Attachment_X-DGS_Standard_Specifications_and_Owner’s_Project_Requirements.pdf

SUPPLEMENTAL DESIGN GUIDELINES

DISTRICT OF COLUMBIA DEPARTMENT OF GENERAL SERVICES

CAPITAL CONSTRUCTION SERVICES

Version: 2023.12.21

[PROJECT NAME]

[PROJECT ADDRESS 1]

[PROJECT ADDRESS 2]

DGS – CAPITAL CONSTRUCTION SERVICES [PROJECT NAME]

SUPPLEMENTAL DESIGN GUIDELINES December 21, 2023

1. PURPOSE

The purpose of these Design Guidelines is to supplement the technical specifications and provide information to designers, contractors and consultants that may not be found in the technical specifications and owners project requirements. If there is a conflict between these Design Guidelines and the technical specifications and/or owner’s project requirements, then these Design Guidelines shall take precedence.

These Design Guidelines shall in no way be interpreted to modify or take precedence over any part of a contract a designer, contractor or consultant may have with the Department of General Services (“DGS”).

2. MECHANICAL

2.1. No VRF systems are permitted on school projects unless approved in writing by the DGS Project Manager.

3. ELECTRONIC LOCKDOWN HARDWARE

3.1. No wireless lockdown hardware systems are permitted; all systems MUST be hard wired. DGS will not accept a wireless system as an alternate.

3.2. For school projects, a wired lockdown hardware system must include the following spaces:

• Classrooms

• Academic support spaces

• “Big box” assembly spaces, such as an auditorium, gym or cafeteria.

• Library

• Administrative suite

• Health suite

4. DOORS, FRAMES AND HARDWARE

4.1. Center mullions are required on all double-doors. Mullions must be removable.

4.2. No vertical rods permitted as part of door hardware package are permitted.

4.3. No hollow metal exterior frames are permitted.

4.4. Technical specification section 08 1113 shall be assumed to pertain to INTERIOR use only.

4.5. For school projects, classrooms shall have a storeroom hardware function with no thumb turn and no closers unless required by code.

4.6. All exterior doors shall have card readers.

4.7. One (1) single exterior door shall be hard keyed to provide to building staff.

4.8. Two (2) exterior doors shall be hard keyed for DGS access. One shall be for standard building entry and the other shall be for exterior boiler room access, if such a door exists. If no exterior boiler room door, then only one (1) exterior door shall be hard keyed for DGS access.

4.9. All other exterior doors not keyed per section IV (G) and (H) shall have no cylinders or blank cylinders.

4.10. All mechanical, electrical and IT closets shall be keyed alike.

4.11. ADA push operators must be installed at every main entrance, even if not required by code. Wall mounting of the buttons is preferred; if not feasible, freestanding pedestal may be utilized with Owner approval (see attached spec). Wired is required; if not feasible; a wireless button with adequate signal strength is acceptable.

5. SECURITY

5.1. Two video door stations shall be installed at each facility: one (1) shall be at the main entrance and one (1) shall be at the loading dock area or the kitchen service entrance.

5.2. Door phones (base station) shall be installed at both the security desk and at the main office to respond to the main entrance door station and one in the kitchen to alert staff to deliveries. Only the door phones for the main entrance shall be programmed to remotely unlock the door. Kitchen staff are required to physically respond to door station requests.

5.3. Key tracers are required on all school projects. The KeyTracer device shall be mounted near the main entrance in a public space.

5.4. All access control system elements shall be installed by an RS2 certified vendor. All intrusion detection system elements shall be installed by a DMP or Bosche certified vendor.

6. INTERIOR PLANTINGS

6.1. No interior plantings are allowed.

7. PROJECTORS

7.1. For assembly spaces provide permanent mounted projectors. If the application does not allow for permanent type provide mobile cart with projection screen.

8. ARTIFICIAL TURF FIELDS AND PLAY AREAS

8.1. Painted game lines and striping is not acceptable. All game lines, letters, and logos shall be artificial turf carpet fibers provided in the colors shown on the approved shop drawings.

9. ATHLETIC EQUIPMENT

9.1. Soccer goals shall be equipped with both metal anchors and water weights.

10. SPECIAL WARRANTIES

10.1. The following minimum warranties must be part of the specifications, and, unless otherwise noted, cover installation and manufacturers warranties:

Minimum General Requirements

Maintenance Contract | Agreement Requirements

Enclosed Switches 2-year installation 2-year manufacturer

Surge Protection 5-year manufacturer Grounding and Bonding for Communications System

20-year manufacturer

Wireless Access Points 20-year manufacturer Audio Visual Systems Varies per manufacturer 12-month, by-annual inspections

Optional 5-year service contract Intercom and Master Clock System

2-year 12-month, by-annual inspections Optional 5-year service contract

Alarm and Access Control Hardware/ Equipment

2-year 12-month, quarterly inspections Optional 5-year service contract

Telephone and Data Systems

2 years 12-month, quarterly inspections Optional 5-year service contract

VSS and CCTV 2-year 12-month, by-annual inspections Optional 5-year service contract

Poured-in-place Rubber Surfacing

5 years manufacturer

Turf and Grasses 2-year Seed 60 days and sod 30 days from Substantial Completion Watering through growing season

Plantings 2 years on District Property 3 years on Public Right-of-way

Watering through end of growth season

Self-Adhering Sheet/ Waterproofing

2 years on installation 5 years manufacturer

Metal Wall Panels 5 years manufacturer Metal Composite Material/ Wall Panels

5 years manufacturer

Roofing 5 years on installation 30 years manufacturer

Roofing Insulation 15 years manufacturer Green Roof 2-year installation and manufacturer 2-year service contract with minimum of 8-annual visits Optional 5-year single-source warranty including extended overburdened warranty

Aluminum Windows 10-year manufacturer Wood Windows 5-year manufacturer Laminated Glazing 5-year manufacturer Door Hardware 1-year installation

3-year manufacturer

Flooring 2-year installation Manufacturer varies per product type

Kitchen Equipment 2-year 2-year refrigeration service

Follow up demonstration in addition to training requirements 3 months after kitchen

Playground Equipment 2-year installation 5-year manufacturer

Cabinets and Casework 5-year manufacturer Elevators 2-year 12-month Plumbing Fixtures 5-year Mechanical Systems 2-year min. system-wide

Manufacturer warranties vary per parts/systems

HVAC Water Treatment 2-year 1 year including chemical supply HVAC Compressors 5-year installation

Heat Exchange Equipment 25-year manufacturer Energy Recovery Wheels 5-year manufacturer Generator 2-year installation

5 years (?)

Lighting Controls 2-year installation

Switchboards 2-year installation

Panelbaords 2-year installation

Electricity Metering 2-year installation 10-year manufacturer

Metal and Ornamental Fencing

10 years

Electric Charging Stations

1-year installation 3-year manufacturer

Optional 5-year service contract

11. EMERGENCY EVACUATION MAP

11.1. Evacuation maps shall be prepared and furnished per Exhibit A. Any deviation from the standard exhibit shall be approved by DGS.

• Page Layout: Landscape, unless portrait suited better for the overall floorplan

• Min Size: 11” x 8.5”

• Finish: Laminated

• Develop plan for each room/space. Some assembly spaces may require more than 1 plan depending on quantities of egress doors.

• Mounting: Provide surface mounted signage interchangeable inserts

EXHIBIT A – Emergency Evacuation Map

12. FURNITURE, FIXTIRE AND EQUIPMENT

12.1. Kitchen equipment

• No combi-ovens are allowed

13. ATTIC STOCK

13.1. Provide one set of filters adequate for one round of filter changes throughout the facility or campus.

13.2. Attic stock should be kept at a minimal. Coordinate with owner on type and quantity.

14. FIRE ALARM SYSTEMS

14.1. Specify non-proprietary and networkable fire alarm system

• Approved manufacturers: Honeywell and Miracom

• Fire Alarm panels are required to be able to communicate via analog and the IT ethernet network.

14.2. Systems are required to integrate to the network

15. PHONES LINES

15.1. Minimum of five (5) POTS (analog) lines are required at each facility.

16. STANDBY GENERATOR

16.1. Standy generator shall have capacity to power at a minimum below systems and equipment:

• All emergency lighting

• Electrical lockdown system

• Security desk area

• Security panel

• Access control panels

• All receptacles within IT closets

• HVAC Split systems within all IT rooms

• IT Closets (MDF is priority, secondary IDF)

• Elevator shaft lighting and receptacles

• Elevator car lighting & HVAC

• Sump Pumps

• Kitchen Freezer (lighting, heater, alarm, blower coil, compressor rack)

• Kitchen Cooler (lighting, heater, alarm, blower coil, compressor rack)

• Health Suite Refrigerator

• BMS Workstation

• Fire Pump (if needed)

• Main Fire Alarm control panel

• Generator components (battery heater, service receptacles/lighting, etc.)

16.2. Any exceptions to the minimum requirements shall be approved by DGS.

17. PLUMBING

17.1. Sump pump and sewage ejectors in new construction:

• Sump pumps and sewage ejectors are not preferred. If necessary, must be approved by

DGS.

18. FOUNDATION AND SUBSURFACE DRAINAGE

18.1. 4-inch perforated 8LF O.C. drain tile is required for below slab under drain system along perimeter. Sump pump is recommended for this application. Coordinate with DGS.

19. EXPANSION JOINTS

19.1. Transition cover plates are required at expansion joints.

19.2. Material selection for the transition cover shall coordinate with the floor finishes.

20. WATERPROOFING

20.1. Drainage boards, protection boards, waterstops, blindside & post-applied waterproofing details:

20.1.1. Below-grade blind-side waterproofing is not preferred. Coordinate with DGS.

20.1.2. Include specification requirements for early submissions within 30/60 days of project specific shop drawings, detailing transitions with interfacing building envelope components such Air Barrier, SF-CW window openings, doors and entrances.

20.1.3. Specify required number and frequency of manufacturer site visits at pre-defined stages of construction – to review at commencement substrate preparation; during insulation installation, membrane, penetrations and final inspections prior to backfill/cover up by other envelope components such as brick veneer/panels/aluminum storefronts etc.

21. PLAYGROUND EQUIPMENT AND SURFACIS STANDARDS

21.1. Standards for Poured in place rubber:

21.1.1. The poured in place (PIP) top layer mix shall consist of 100% color granules; no black granules are permitted.

21.1.2. PIP binder shall be aliphatic.

21.1.3. High traffic areas shall have 1 inch wear surface.

21.2. ATM Standards:

• ASTM F1487 Standard Consumer Safety Performance Specification for Playground

Equipment for Public Use.

• ASTM F2373 Standard Consumer Safety Performance Specification for Public Use Play

Equipment for Children 6 Months through 23 Months.

• ASTM F1292 Standard Specification for Impact Attenuation of Surface Systems Under and Around Playground Equipment.

• ASTM F2075 Standard Specification for Engineered Wood Fiber for Use as a

Playground Safety Surface Under and Around Playground Equipment.

• ASTM F2223 Standard Guide for ASTM Standards on Playground Surfacing.

• ASTM F2479 Standard Guide for Specification, Purchase, Installation and Maintenance of Poured-In-Place Playground Surfacing.

• ASTM F1951 Standard Specification for Determination of Accessibility of Surface

Systems Under and Around Playground Equipment.

• ASTM F1816 Standard Safety Specification for Drawstrings on Children's Upper

Outerwear.

22. ENERGY DASHBOARD

22.1. Requirements for Energy Dashboard:

22.1.1. Breakdown on energy use submetering unless otherwise specified (for example refer Exhibit D):

• Total Building KWH

• HVAC KWH

• Lighting KWH

• Plug Load KWH

• Kitchen KWH

• Cafeteria KWH

• Gymnasium KWH

• Large Assembly Spaces: Media Center, Aquatic Facility and similar KWH

• IT, MDF and IDF Rooms KWH

• Renewable Energy KWH

22.2. Water metering for the overall facility

22.3. Energy Dashboard proposed system shall be non-proprietary open-source system. Prior procurement of such systems coordination with DGS and OCTO departments are required for compatibility and maintenance.

EXHIBIT D – Energy Dashboard

FACILITY | BUILDING NAME

OWNER’S MEP PROJECT REQUIREMENTS

DISTRICT OF COLUMBIA DEPARTMENT OF GENERAL SERVICES

CAPITAL CONSTRUCTION SERVICES

Version: 2023.12.21

[PROJECT NAME]

[PROJECT ADDRESS 1]

[PROJECT ADDRESS 2]

DGS OWNER'S PROJECT REQUIREMENTS December 21, 2023

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1. INTRODUCTION

The District of Columbia Department of General Service (DGS) and DC Public Schools (DCPS) have always made sustainable, high-performance schools for their students a priority. With the introduction of the Clean Energy DC Omnibus Amendment Act of 2018, which targets to increase the Renewable Portfolio Standard to 100% by 2032, and establishes a solar energy standard post 2032, DGS recognizes that its public schools play a considerable part in the District s energy reduction goals.

As the District continues to push its sustainable initiatives even further, with the goal of eliminating all fossil fuel use in public buildings, it is important that DGS, in collaboration with Design Teams, take a critical look at the systems that it designs for all modernized and new school buildings.

This document is meant to serve as a guideline and reference for Project Teams to use in the design of all DGS projects including DC public school facilities, but it is not the only reference material available to teams. The following documents, issued by the Department of General Services and DC Public Schools with each project solicitation, should also be referred to, and considered as complimentary to this OPR:

• Department of General Services (DGS) Division 01 Specifications

• DC Public Schools Educational Specifications

• DGS ADA Compliance Quality Control Manual

• DGS MEP Systems-Commissioning-TAB Quality Control Manual

This document is intended to be used as reference for basis of design for all DGS projects. Any specifications and design recommendations changes shall be coordinated with the client and/or user agency and DGS.

2. SCOPE

2.1 Overview and Definition

The Owner s Project Requirements (OPR) provide an explanation of the ideas, concepts and criteria that are considered to be very important to the Owner, coming out of the programming and conceptual design phases and which are desired to be tracked throughout design and construction. The OPR is developed by the owner, not the design team, but includes an area for the Design Team and Owner to include project specific targets and goals.

The OPR document sets the functional goals that the design is judged against and establishes the basis of the criteria used during construction to verify actual performance.

The OPR does not list items that are already required by code. The OPR is generally not a description of what specifically will be included in the project design, but is the more general feature and categorical performance criteria to be met by the design. Where practical and known, the OPR includes measurable indicators used to verify that the performance requirements were met.

The OPR will be followed by the basis of design or design narrative written by the design team and included with design package submissions. The basis of design documents the

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primary thought processes and assumptions behind the design decisions and describes the design elements being incorporated to meet the OPR.

2.2 Scope

This document includes requirements for the building systems that are more likely to be included under the formal commissioning umbrella or be impacted by their interactions. For reference, systems not included in this project and OPR that are typically commissioned and should have an OPR developed for them include: process mechanical and plumbing, exterior envelope performance, and other moving mechanical devices.

This document is not a comprehensive project OPR, and does not include all project requirements and directives to the design team which could include: other disciplines such as fire protection, structural, landscaping, civil, geotechnical and other earth work, utilities, Division 01 specification requirements, demolition, all the materials, furnishings and special construction disciplines, drawing, specification and calculation requirements, codes and references, etc.

This document focuses on the mechanical, energy and comfort related systems and on the sustainability requirements of the project. This document does not replace the Commissioning OPR, but rather should serve as a guide in its development.

2.3 Procedures

All products included in this document or the referenced appendix documents are Basis of Design (BOD) only.

2.3.1 Substitutions

Substitutions or deviations can be considered by the Owner on a case by case basis and should be communicated to the Owner and DC Public Schools during Concept or Schematic Design for evaluation and approval. Substitutions requested by bidders after Design Development must be submitted per the Division 01 specification requirements.

Under each area or building system is a list of pertinent questions and data needed to be answered. Blue, indented italicized text indicates the answers to the questions and specific information about the project requirements for this project.

2.3.2 Submittal Review

Submittal requirements outlined in the DGS Division 01 specifications and DGS MEP Quality Control Manual should be followed.

3. GENERAL PROJECT REQUIREMENTS

This section of the OPR is intended for the Owner and Design Team to input project specific information that may assist in the design and scheduling, as well as describe project specific goals and objectives.

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3.1 Overall Objectives

Describe this project, including the general overall objectives: Click or tap here to enter text.

3.2 Existing Site Conditions:

Describe any existing conditions of the site that may aid in, or impair, the ability to meet project objectives: Click or tap here to enter text.

3.3 Occupants

What grades / age ranges does the school serve?

Early Childhood (0 to 30 months)

Pre-Kindergarten (Pre-K3 and Pre-K4)

Elementary School (Kindergarten through 5th Grade)

Middle School (6th Grade through 8th Grade)

High School (9th Grade through 12th Grade)

Other Click or tap here to enter text.

3.4 Zoning

What are the floor number and/or building height requirements, and zoning limitations of the site?

Click or tap here to enter text.

3.5 Community Use

What community function / activities must this facility accommodate?

3.6 Energy Efficiency Goals

What are the overall energy efficiency goals and objectives?

EUI of Click or tap here to enter text.

International Energy Conservation Code Click or tap here to enter text.

Energy Star

Net Zero Energy (NZE)

LEED version: Click or tap here to enter text.; Certification Target: Choose an item.

Other Click or tap here to enter text.

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3.7 Sustainability Goals

What other environmental goals and requirements are there?

3.8 Schedule

Describe the expected phasing of the project for construction and occupancy:

4. HEATING, VENDTILATION AND AIR CONDITIONING

4.1 Owner s Preferred Building Systems

4.1.1 HVAC System Performance and Design Considerations

The HVAC design must comply with all applicable DC Construction Codes and standards.

Occupant health and thermal comfort shall be provided by HVAC system that must be designed to maintain the thermal and humidity parameters as described in Section 4.5 below.

Outdoor Air (OA) ventilation for the thermostatic zones must be in accordance with latest edition of ASHRAE Standard 62.1: Ventilation for Acceptable Indoor Air Quality .

Historically almost all large central HVAC systems showed poor part-load efficiencies.

In order to reduce annual power consumption and improve building HVAC system energy performance DGS considers de-centralized building HVAC system design approach to be most energy efficient for their new construction and modernization projects.

For a consistent HVAC system energy conservation design, the engineer should consider terminal units in each thermostatic zone/room coupled with Dedicated Outdoor Air System (DOAS) terminals.

Water Source Heat Pumps and Geothermal Heat Pumps are best suited for this application.

DOAS unit(s) shall be Direct Expansion (DX) cooling with electric heat and integral total heat recovery equipment.

4.1.2 Water Source Heat Pump (WSHP) System

Geothermal Heat Pumps (GHP) and Water Source Heat Pumps (WSHP) are the preferred HVAC system for both school modernization and new school projects.

• Geothermal Loop: Where acreage, construction phasing, and programming allows, geothermal heat pump systems should be used.

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• Cooling Towers:

o Cooling Towers with remote basins or below grade basins should be used when

GHP system is not feasible.

o Cooling Towers shall be designed such that freeze protection is unnecessary or minimized.

o Boilers shall be utilized for providing heat to the heat pump hydronic system

4.1.3 Dedicated Outdoor Air System (DOAS)

DOAS unit(s) shall be capable of pre-filtering, pre-conditioning and delivering OA to all school building zones served by WSHP or GHP system. DOAS unit(s) shall operate during occupied mode to meet ASHRAE Std. 62.1 requirements and shall be off during un-occupied mode. DOAS unit(s) shall modulate their respective supply fan(s) and deliver needed amount of OA in response to demand by each individual control zone. Each zone OA quantity demand shall be controlled by the level of CO2 as measured by the zone CO2 censor.

Whenever possible, DOAS units should be located within the building so as to preserve rooftop area for photovoltaics. Acoustic performance of the units so as not to disturb classrooms when located inside the building, or neighbors if located on the roof, are a priority. The highest level of internal acoustical dampening and isolation shall be specified for either instance.

4.2 Potential Alternate Building Systems

4.2.1 Variable Refrigerant Flow (VRF) Systems – not allowed

4.2.2 Variable Air Volume (VAV) system with Hydronic Terminal Reheat

The VAV system with Hydronic Terminal Reheat may be an acceptable alternate for use in select projects with DGS approval. The VAV system represents a central system that is inherently less energy efficient than Water Source or Ground Source Heat Pumps. The design team will need to offset the increased energy use by the VAV system equipment with premium efficiency motors and energy reduction measures elsewhere, or by additional onsite renewable energy sources which has a potential added cost to the project.

4.3 Zoning and Distribution

On projects where the Building Automation System (BAS), connectivity, and enteliWEB® integration allows, the building should be zoned by use and occupancy to the greatest extent possible, to allow for different spaces (floors, wings, cafeterias, auditoriums, gyms, administrative areas, and lobbies) to be programmed to different setpoints and occupancy schedules as appropriate.

Different program areas may require different systems, and each should be evaluated against how it may affect the space available for the program.

4.3.1 Water Source Heat Pump Closets

Water Source Heat Pump units are well suited to academic and administrative spaces.

WSHP units shall be ducted type to allow for even air distribution to the spaces served.

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• Indoor vertical ducted type water source heat pump units are preferred to large rooftop equipment because it allows more rooftop area to be available for photovoltaic panels. WSHP units shall be placed in a dedicated heat pump closets to allow for easy maintenance access. Heat pump closet quantity and distribution should be carefully evaluated before a decision is made to ensure they are not taking too much interior space away from what is needed to meet the DC Public School Educational Specifications.

• If excess floor space is not available, concealed horizontal ducted type water source heat pumps could be located in the ceiling plenum. Accessibility to above ceiling units should be planned carefully. Heat pumps require routine filter replacement.

4.3.2 Direct Expansion (DX) rooftop systems

Direct Expansion packaged rooftop systems with gas or electric heating can be considered for large program spaces such as gymnasiums, cafeterias and auditoriums. For those systems minimum code required OA will be mixed with return air at the rooftop unit mixed air section.

4.4 Occupancy

4.4.1 Time of day schedules

Buildings will be considered in occupied mode during the standard school day. A school will be set to unoccupied mode for any hours outside of the standard school day, weekends, DC Government holidays, and during scheduled school closures.

The school building occupancy schedule is as follows:

Day of Week State Morning Occupied Unoccupied Special Event

School Year Weekdays

On 5:00 a.m. 6:30 a.m. 5:00 p.m. 5:00 p.m.

Off 6:30 a.m. 5:00 p.m. 5:00 a.m. 10:00 p.m.

School Year Weekends

On 8:00 a.m. 8:00 a.m. 5:00 p.m. 5:00 p.m.

Off N/A 5:00 p.m. 8:00 a.m. 10:00 p.m.

Summer Break

On 8:00 a.m. 8:00 a.m. 5:00 p.m. N/A

Off N/A 5:00 p.m. 8:00 a.m. N/A

Winter Break

On 8:00 a.m. 8:00 a.m. 5:00 p.m. N/A

Off N/A 5:00 p.m. 8:00 a.m. N/A

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The anticipated occupancy schedules per zone are as follows:

Zone Morning Start Occupied Unoccupied Evening Stop

Administration, Library, Gymnasium, & Cafeteria

6:00 a.m.

8:00 a.m.

5:00 p.m.

5:00 p.m.

Kitchen 4:30 a.m. 6:30 a.m. 1:30 p.m. 2:30 p.m.

Classrooms 6:30 a.m. 8:00 a.m. 3:30 p.m. 4:30 pm

All Other Areas

6:30 a.m. 8:00 a.m. 3:30 p.m. 4:30 pm

4.5 Setpoints

The setpoints outlined below have been developed by DGS and are in alignment with peer municipalities, institutions, and ASHRAE Standard 55-2020: Thermal Environmental Conditions for Human Occupancy. Note these standards only address temperature and relative humidity setpoints for terminal equipment serving various building zones and do not address ventilation requirements. Ventilation equipment is not intended to provide for local comfort changes.

4.5.1 Temperature and Humidity

Heating Season (Starting October 15):

• Occupied Mode:

o Classrooms and offices shall heat to 70oF DB. Where terminal equipment and controls allow, a comfort band shall be established which provides local adjustments of +/- 2oF o Gymnasiums and hallways shall be set to 68oF DB o Relative humidity will not be controlled

• Unoccupied Mode:

o All spaces shall be set back to 55oF

Cooling Season (Starting April 15):

• Occupied Mode:

o All spaces shall cool to 75oF DB. Where terminal equipment and controls allow, a comfort band shall be established which provides local adjustment of +/- 2oF.

o Gymnasiums and hallways shall be set to 72oF DB

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o Relative Humidity shall be 50% +/- 10%

• Unoccupied Mode:

o All spaces shall be set back to 85oF DB o Relative humidity will not be controlled

4.6 HVAC Performance Requirements

4.6.1 WSHP units

WSHP and GHP unit s efficiency ratings (CoP and EER) shall meet or exceed values prescribed in ASHRAE Std. 90.1 Chapter 6 and latest adopted edition of International Energy Conservation Code (IECC).

4.6.2 Acoustics

Acoustics is a critical component of creating a successful, high-performance classroom environment. It is as critical that students are able to hear what their teachers are saying without the teacher straining their voice as it is to prevent distractions from noises that come from adjacent spaces, corridors, or equipment. Studies performed on DCPS occupied classroom conditions in non-modernized buildings regularly exceeded the industry benchmark standard AS/NZS recommended levels for acoustics and that even unoccupied conditions failed to meet the requirements for the United States Green Building Council (USGBC) LEED credit for Enhanced Acoustics. However, pre- and post-occupancy studies of DCPS schools have also shown that student and teacher satisfaction with acoustics in the modernized schools continues to remain low after renovation. This could be due to more active, contemporary learning styles that make for a more dynamic and louder learning environment. It is very important therefore to keep any additional background sound from HVAC equipment low, within the recommended dB values.

Acoustics of rooftop equipment should also be carefully considered at school sites located in tight residential communities. The highest level of internal, integral, sound attenuation available for the equipment shall be specified.

Whenever possible, it is DGS preference for major HVAC equipment to be located within the building envelope, so as to reserve rooftop area for photovoltaic panels. However, if building size or other conditions do not allow this, the acoustical qualities of the proposed rooftop equipment will be carefully considered. Water source rooftop equipment is preferred by DGS. It is quieter and requires less sound isolation measures than air source units.

4.7 Indoor Environmental Quality (IEQ)

Over the past few years, wellness has become a common topic of concern and focus in public school modernizations. Recent research performed in conjunction with District of Columbia Public Schools suggests that the Indoor Environmental Quality (IEQ) of a learning space can have a large impact on student and teacher happiness and performance.

Measurable components of IEQ include the amount of natural daylight, thermal comfort, acoustics, and air quality. This OPR will focus on two of these: Thermal Comfort and Air

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Quality.

4.7.1 Thermal Comfort

Thermal discomfort can cause feelings of fatigue, irritability, and depression. Studies have shown that for every decrease of 1.8-degree F between 77-degree F and 68-degree F, students speed performance on tests was improved from 2-4% in all tasks (D.Wyon & P.

Wargocki, Indoor Environmental Effects On The Performance of School Work By Children, ASHRAE, 2007). In a study conducted by the Harvard TH Chan School of Public Health, they found that test scores increased by 4% when the temperature in the space did not exceed the upper acceptable thermal limit.

Learning environments shall be designed that promote thermal comfort and health of the students and faculty. The HVAC system design shall allow for this acceptable temperature range to be maintained, while at the same time being cognizant of the energy use of the building and allowing the spaces to drift in the unoccupied time when students are not present.

Access to natural daylight in the classroom can also have a significant impact on a student s concentration and general wellbeing. Proper daylighting should be studied to ensure that not only is there enough light getting into the space, but also to make sure that there’s not too much light, which can lead to unnecessary heat gain within the space, as well as glare problems.

4.7.2 Air Quality

Fresh air is very important to the ability to effectively teach in the classroom settings, and to the cognitive learning of students, and on student attendance. There have been national studies on this effect as well as the independent study performed on modernized and non-modernized DCPS schools. the importance of good indoor air quality on the cognitive learning of students and student attendance.

The ASHRAE 62.1 requirements for ventilation stipulate a maximum CO2 levels for schools at 1000 ppm. Ventilation designs should maintain levels in classrooms and education spaces below the threshold, while also balancing the operation and life cycle costs of required systems to make this an optimal learning environment.

Demand Control Ventilation (DCV)

Demand Control Ventilation (DCV) is an energy-saving control strategy that responds to the actual demand for ventilation in a zone by varying the rate at which outdoor air is delivered to that zone.

Per ASHRAE 90.1-2013 DCV is required for spaces larger than 500 sq. ft. and a design occupancy for ventilation higher than 25 people per 1,000 sq. ft. School classrooms, cafeterias, and auditoriums are all suited for this control strategy.

DCV should be incorporated into HVAC system design so that ventilation air amounts are distributed according to the actual occupant load. Classrooms and all high

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occupancy spaces shall include CO2 censors to regulate the amount of fresh air required.

4.8 Maintainability

4.8.1 Access / Equipment Locations

Ease of access is critical for ensuring that routine maintenance takes place, and that equipment continue to operate smoothly.

Water Source Heat Pumps: WSHP are preferred option to rooftop equipment as they are located within the building instead of on the roof. It is preferable that they be installed in closets, with filters located within reach. If floor area is at a premium, it is acceptable to install WSHP in the ceiling plenum. The ceiling should be acoustical ceiling tile to allow for easy access above the ceiling grid and provide acceptable level of noise attenuation from WSHP fans. Identification tags should be provided on acoustical ceiling grid.

Installation of WSHP above drywall ceilings is not preferred, but if necessary, access panels should be sized and located as necessary for maintenance access. Locations of access panels should be included on as-built documentation.

Rooftop Ductwork: The use of exposed duct work on the roof should be limited to the greatest extent possible, for maintenance, longevity, and to preserve as much rooftop area as possible for photovoltaic panels.

Unit Wall Heaters: The use of wall mounted unit heaters in stairwells should be avoided. They are prone to vandalism and large amounts of maintenance.

4.8.2 Identification

Equipment labels and tags shall be visibly located within the room.

4.8.3 Materials

The use of mechanical fittings for refrigerant piping is prohibited.

4.9 Operations and Maintenance Documentation

Refer to the Department of General Services Division 01 specifications for the projects Operation and Maintenance (O&M) documentation requirements.

4.10 Training

Refer to the Department of General Services Division 01 specifications for the project s requirements around training and building turnover.

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5. ENTERPRISE BUILDING AUTOMATION SYSTEM (eBAS)

5.1 Remote Monitoring

The BAS system shall allow remote monitoring of all electrical, water, and gas meters and services, as well as allow DGS to remotely control all functional equipment.

The BAS system should be BACnet compatible and follow ASHRAE Standard 135 protocols and be capable of connecting to the DGS enteliWEB® system.

5.2 Thermostatic Zoning Layout

The quantity and layout of a buildings HVAC thermostatic zones has a direct impact on meeting the Owner s energy saving goals and should be carefully considered during the early design phases. It can also assist in increasing the longevity of the building s equipment by only turning on and off parts of systems when occupancy demand needs them. A total of six (6) to twelve (12) zones are reasonable for the public schools depending on site orientation and envelope thermal gain / loss, physical layout of the rooms and program spaces, and occupancy schedule.

5.3 Point Naming Standards

5.3.1 Room Numbering

The Architect shall develop the room numbers and room naming standard in collaboration with the DCPS Design Manager and Project Coordinator during the Schematic Design phase of the project.

The following are the recommended room numbering protocol. This should be confirmed with DGS and DCPS on a project by project basis. Some unique situations may require adjustments to this system.

• The first number shall refer to the floor level (1, 2, 3, etc.). For basement levels, use the letter B.

• If the school has been divided into zones by use (academic wing, athletic wing, etc.) the second position should be reserved for the letter representing that zone (A, B, C, etc.)

• The following 2 digits should refer to the room number (00, 01, 02, etc.). Rooms should be numbered sequentially in a movement around the building agreed to by DCPS and the school administration.

• Rooms within larger program suites should use the same number as the main room, with a letter suffix designation to differentiate it (A, B, C, etc.).

Once approved by DCPS, the approved room numbers shall be distributed to the design team for use in schedules, equipment and controls naming. The Architect shall be responsible for keeping the team updated on any changes to room names or numbers.

5.3.2 Point Naming and Tagging

DGS utilizes Project Haystack as its standard for point naming and tagging. Design teams should utilize the Project Haystack website at www.project-haystack.org. Project Haystack and all of its associated intellectual property is managed as an open source project using the Academic Free License (AFL) 3.0. Anyone is free to participate as long as contributed IP is licensed under the

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AFL.

5.3.3 Equipment and Controls Naming Standards

DGS utilizes the GSA Data Normalization standard as a basis for its equipment naming. Controls naming should follow the standards outlined in the DGS Unified Controls Specification.

The Controls contractor is required to get final approval and sign off on the equipment and controls naming from DGS Facilities and Maintenance Division and the DGS Sustainability & Energy Division during the submittal review process.

Refer to APPENDIX B and C at the end of this OPR for the referenced standards.

5.3.4 At Closeout

For projects incorporating enteliWEB®, a copy of the architectural floor plans with final building room names has be provided with the Controls Operation & Maintenance (O&M) manuals required for project closeout. Refer to DGS Division 01 specifications for all closeout requirements.

5.4 Emergency Notifications

Emergency notifications for critical systems shall be automatically generated and distributed via text message or other electronic message delivery service to the appropriate DGS and/or DCPS personnel. The following critical alarm notifications shall be provided:

Equipment: Event: Point of Contact:

Kitchen Walk-In Units Power Failure DGS First Team

Vaccination / Medication Refrigerators Power Failure DGS First Team

Sump Pumps Power Failure DGS First Team

Roof Leak Detection Moisture detection DGS First Team

Elevators Power Failure DGS First Team

Emergency Generator Failure DGS First Team

5.5 Local HVAC Control

Local HVAC controls for classrooms and offices need to contain easy to understand labels and/or graphics so teachers and staff can operate them without training. They also need to be durable, and mechanically attached to walls and partitions. Readout on the local control device must accurately match the conditions of the space they are connected to. (i.e. a temperature reading of 72 degrees F should match the physical condition of the air temperature in the space.). It is important that the Building Automation System (BAS) program range, and what the local control

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can do, should match.

The following spaces should always be controlled only by the BAS:

• Corridors

• Stairwells

• Gymnasium

• Cafeteria

• Natatorium

Corridors, Gymnasiums, Cafeterias, and Natatoriums may contain keyed or otherwise locked / protected override switches.

6. ELECTRICAL SYSTEMS

6.1 General

The District of Columbia is moving towards eliminating all fossil fuel use in public buildings.

This means that there will be an ever-increasing demand on a building s electrical service to provide power for HVAC and water heating systems. It is also important that Design Teams check early in design process that the available electrical service to the building is adequate to support all of the building’s electrical needs.

If the electrical service to a site is not sized to support the building loads, PEPCO should be engaged immediately in order to discuss options for a service upgrade.

6.2 Power Monitoring

Metering in the public schools is essential to evaluate the performance of the systems, and to assist with Commissioning, and Net Zero Energy certification efforts. Proper metering also allows the Owner to ensure that billing for different utilities are being properly tracked and distributed to responsible parties.

All meters should be integrated with the eBAS.

6.2.1 Campus Level Metering

Campus Level Metering should be considered for project sites that will have multiple agencies or tenants using the premises, and separate utility billing is required.

Some site amenities, such as Electric Vehicle (EV) charging stations, or recreational pools and splash pads, require separate metering for use tracking and billing.

In some instances, running separate utility services to the site may be preferable to campus level metering. The Design Team should engage DGS during the Concept and Schematic Design phases to discuss the options and decide what makes the most sense for the Owner s billing and tracking needs.

6.2.2 Whole Building Meters

Whole Building Metering should be used for:

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• Incoming Electrical Service

• Domestic Water Service

• Gas Service

• On-site Renewables

• Emergency Natural

• Gas Generators

On-Site Renewables: Metering of on-site renewables, such as photovoltaic panels and wind turbines, allows DGS to be able to compare the actual amount of power generation at each site against what is being billed. Metering of renewables should be compatible with the LOCUS software platform which connects via API to meters. On-site renewables that should be metered include:

Emergency Natural Gas Generators: Metering of emergency natural gas generators is a requirement of the net zero energy certification process, to allow for the separate tracking of gas use for emergency purposes versus general building use.

6.2.3 Single-Point Sub-meters

Single-Point Submeters are used by DGS to evaluate the efficiencies and performance trending of specific portions of, or equipment used in, the building s systems. Data from single-point meters should be able to be pulled in the Owner s enteliWEB® platform.

The following components should be sub-metered, with the specified tracking intervals:

• Central Plant Chillers: GPM (Gallons per minute), Supply / Return Water Temperature

(Degrees F), BTU per hour at 15-minute interval

• Cooling Tower Make-up Water: GPM at 5-minute intervals and totalized gallons must be stored

• Cooling Tower Blow Down (as required by jurisdiction): Totalized gallons must be stored

• Boilers: BTU per hour at 15-minute intervals

• Geothermal Well Field Generation: BTU per hour at 15-minute intervals

• Domestic Hot Water: Totalized Gallons per day

• Recirculation Pumps: GPM at 15-minute intervals

• Hose Bibs: GPM at 5-minute interval o Discuss the need for hose bib metering with DGS prior to including, as this is not typical, but may be required depending on site location and security

• Site Water Features (make-up water): GPM at 5-minute intervals and totalized gallons must be stored for at least a year

• Interior Lighting: kWh used per day, week, month must be stored for at least a year

• Exterior Lighting: kWh used per day, week, month must be stored for at least a year

• Plug Loads: kWh used per day, week, month must be stored for at least a year

6.2.4 Branch Circuit Submeters

Branch circuit sub-metering is required where the Owner desires to track the energy use and performance of either specific areas of the building, or systems across the entire building. The following branch circuit sub-meters should be included:

• Kitchen Electrical

• Building Plug Loads

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• Interior Lighting

• Exterior Lighting - Single point sub-meters may be required by DGS to track security, parking, and athletic field lighting separately. Project Teams should coordinate needs with the DGS and DCPS project management teams.

• IT Loads (MDF/IDF) HVAC Loads

• Domestic Water Heating

6.3 Lighting

6.3.1 Lamps

All interior and exterior lighting should be LED.

6.3.2 Locations and Access

Lights in Gymnasiums, Natatoriums, Atriums, and over Auditorium fixed seating are hard to access and provide maintenance issues for DGS. Lifts to reach high bay areas in occupied schools are not always available, so light fixture access for occasional maintenance should be carefully considered in these situations. Whenever the option is available, remote drivers for high bay and difficult to reach lights should be used, with the drivers installed in readily accessible locations.

For pendent fixtures, the following mounting heights should be observed:

• Elementary Schools: minimum of 8’- 6” AFF to bottom of light fixture

• Middle &High Schools: minimum of 9’- 0” to bottom of light fixture

6.3.3 LED Temperature

Lights in the 5000K range are optimal for the majority of school related tasks requiring high levels of focus and concentration.

The ability to tune the color temperature in classrooms to specific tasks and activity can benefit the learning environment. Higher temperatures around 5500K can assist with concentration during testing, and when engaged in math and science activities. Lower temperatures in the 4000K range are recommended during group activities and classroom discussions. Even lower settings, around 3000K, help to calm students down after stimulating activities such as gym, lunch, and recess.

The design team should discuss the potential use of color tuning lighting with DGS and DCPS during the Concept and Schematic Design phases of the project, to determine which program areas could benefit the most from its use.

6.3.4 Lighting Levels

Required average maintained light levels for this project are listed below. For spaces not listed, the current IESNA light level recommendations shall be followed.

• Classrooms: 35 FC at desk level

• Offices: 35 FC at desk level

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• Lobbies: 20 FC

• Corridors and means of egress: 20 FC while occupied. Gradual dimming to 10 FC allowed with input from daylight and occupancy sensors.

• Conference rooms: 35 to 50 FC

• Group Toilet Rooms and Locker Rooms: 30 FC

• Mechanical / Electrical Rooms: 35 FC

• Science Labs & Prep Rooms: 50 to 75 FC

• Art Rooms: 50 to 75 FC

• Instrumental Band Rooms: 50 to 75 FC

• Gymnasiums: Elementary / Middle School = 50 FC, High School = 80 FC

• Fitness Rooms: 20 to 30 FC

• Exterior lighting at building entrances, walkways, and parking lots: 2 to 5 FC

6.3.5 Lighting Controls

Central lighting control systems should be universal and non-proprietary. The system should be BACnet compatible, and able to connect to DGS enteliWEB® system. Cellular communication will not be accepted.

Local lighting control systems should be user friendly, with easy to understand words or symbols on the light switch faceplates.

6.3.6 Sequence of Operations Local Lighting Controls:

Space Type: Main Switch @ Primary Door:

Secondary Occupancy Control Specialty

Auditorium House Lights

ON / OFF

RAISE/LOWER

N/A Manual ON, Vacancy Sensor

OFF

Classroom ON / OFF

RAISE/LOWER

If 2nd door present, include

ON / OFF

Manual ON, Vacancy Sensor

OFF

Daylight Harvesting

Cafeteria ON / OFF

RAISE/LOWER

If 2nd door present, include

ON / OFF

Manual ON, Vacancy Sensor

OFF

Daylight Harvesting

Conference Rooms

ON / OFF

RAISE/LOWER

If 2nd door present, include

ON / OFF

Manual ON, Vacancy Sensor

OFF

Daylight Harvesting

Gymnasiums

ON / OFF If 2nd door present, include

ON / OFF

Manual ON, Vacancy Sensor

OFF

Daylight Harvesting

Library ON / OFF

RAISE/LOWER

If 2nd door present, include

ON / OFF

Manual ON, Vacancy Sensor

OFF

Daylight Harvesting

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Offices At Door:

ON / OFF

RAISE/LOWER

N/A Manual On / Vacancy Off 15 minutes

Daylight Harvesting

MEP Closets ON / OFF N/A Manual ON, Vacancy Sensor

OFF

N/A

Storage (General)

ON / OFF N/A Manual ON, Vacancy Sensor

OFF

N/A

Toilets Single User

ON / OFF N/A Manual ON, Vacancy Sensor

OFF

N/A

** Alternative See Central Lighting Controls

6.3.7 Sequence of Operations Central Lighting Controls

All interior lighting shall be turned off in any area that will be unoccupied for more than fifteen (15) minutes, except in corridors, stairwells, and exits as required by DCPS or the building code.

Space Type:

Auditoriums As the program requires.

Corridors Control via time clock, with local key switch override located in corridor. Non-key switches allowed if located in a staff-controlled space (i.e. at Welcome Center desk). Lights should turn on with security alarm signal.

Exterior - Building Controlled via astronomical time clock with photosensor override

Exterior Fields Controlled via time clock. Include remote control capabilities.

Exterior - Parking Controlled via astronomical time clock with photosensor override.

Gymnasium Control via time clock, with local key switch override located in gymnasium. Lighting for after-hours use and special event will have to be scheduled with the DGS. Alternative see Local Control options.

Locker Rooms Night Lights with Occupancy Override: Emergency lighting always on 24/7 to provide a minimum average lighting level of 15 FC.

Occupancy sensor near entrance turns all lights on. Lights return to night light mode after 15 minutes of no activity.

Toilets Group Night Lights with Occupancy Override: Emergency lighting always on 24/7 to provide a minimum average lighting level of 15 FC. Occupancy sensor near entrance turns all lights on. Lights return to night light mode after 15 minutes of no activity.

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Exterior decorative lighting is defined as lights that are not part of the building s security lighting at building entrances and exits, or illuminating the parking lots. It may be used to accent walkways or plazas, or for accenting landscape features. Decorative lighting should be circuited and programmed so whereas it may all come on at the same time via a time clock, it can be controlled and turned off separately depending on location.

6.4 Emergency Generator and UPS

The following equipment and systems are required to be connected to the emergency generator:

• All emergency lighting

• Classroom electrical lockdown hardware

• Security desk power and data

• Security panel

• Building Access panel

• All receptacles within IDF and MDF closets

• Cooling system for IDF and MDF closets

• MDF closet

• IDF closet (if possible)

• Elevator shaft lighting and receptacles

• Elevator car lighting and HVAC

• Sump pumps

• Kitchen Freezer (Lighting, heater, alarm, Blower…