24-411-R-JDL-2026-06-23 Norfeldt Elementary IAQ Report.pdf

Prepared by:

Sustainable Engineering Solutions, LLC 865 Brook Street Rocky Hill, CT 06067

(860) 270-0413 www.sustainable-eng.com

IAQ Verification Report Norfeldt Elementary School West Hartford, CT

SES Project No. 24-211 June 23rd, 2026

Sustainable Engineering Solutions, LLC 865 Brook Street Rocky Hill, CT 06067 sustainable-eng.com

Table of Contents Executive Summary

IAQ Verification Process

Filter Evaluation

Ventilation Evaluation

Demand Control Ventilation

Project Approach

Participants

Facility Description

Building

Occupancy

Building Automation System Description

HVAC Systems Description

Air Handling Units

Unit Ventilators

Exhaust Fans

Recommendations

Initial Recommendations

Recommendation #1: Add Mechanical Ventilation To Unventilated Spaces

Recommendation #2: Recalibrate VAVs Associated with RTU-1 & Rebalance Outdoor Air

Recommendation #3: Rebalance Outside Air For AHU-1 and Portable Classroom RTUs

Recommendation #4: Rebalance Unit Ventilators

Recommendation #5: Filter Improvements

Recommendation #6: Rebalance Exhaust Fans

Additional Findings

Finding #1: Implement Demand Control Ventilation For Air Handling Unit – RTU-1 and AHU-1 & 2

Next Steps

Review Recommendations

Appendix A IAQ Evaluation Sheet Appendix B International Mechanical Code Minimum Ventilation Rates (2021) per ASHRAE 62.1

Executive Summary Sustainable Engineering Solutions, LLC (SES) and Trueflow Testing and Balancing were retained by the Town of West Hartford to provide professional engineering and test and balancing (TAB) services to meet the indoor air quality (IAQ) verification requirements of the state legislation Public Act No. 23-167 at Norfedlt Elementary School facility. This combined effort successfully completed the required verification as outlined in the legislation. With a focus on validating and improving indoor air quality, SES and Trueflow systematically assessed each air handling system to measure current ventilation rates, filtration rates and distribution levels compared to current ventilation standards.

Overall, the majority of spaces within the school building do not have any means of mechanical ventilation. Although this may meet typical ventilation requirements, the lack of control and manipulation of outside air conditions allows for unpredictable outside air control and conditioning. Equipment in the remainder of the building varies in age and condition, ranging from 10- 30+ years old.

A review of the testing and balancing data indicates that a majority of spaces served by air handling equipment are not brining in the proper amount of outside air. However, all equipment remains operational, and it is the belief that with proper repairs, calibration and balancing, all existing equipment can meet their spaces ventilation requirements. In sections of the building lacking mechanical ventilation, an equipment installation project must be undertaken to optimize ventilation.

Note that throughout this report the term “ventilation” air and “outside” are used interchangeably and are one in the same.

IAQ Verification Process Filter Evaluation As required by the law, the team reviewed the current level of filtration installed on each air handling system and analyzed the feasibility of increasing the filter ratings to MERV 13. A filter’s minimum efficiency reporting value, or MERV, is a rating system that measures how efficient a filter is at trapping harmful particulate matter, dust, and debris in the air. This rating system categorizes filters into a ranking from 2 to 20, with a MERV 8 being the standard. A higher MERV rating means that a filter is more efficient and MERV 13 is recommended for many commercial and industrial buildings and by state code. At its minimum, a MERV 13 filter traps less than 75% of air particles that are 0.3 to 1.0 microns in size and is at least 90% effective when the particles increase to 3 to 10 microns in size. Along with assessing the filter efficiencies, the condition of unit’s filters and proper sealing of the filter banks to eliminate bypass air was also evaluated.

Ventilation Evaluation The amount of ventilation air delivered into interior occupied spaces is governed by the 2022 Connecticut State Building Code, which references ASHRAE Standard 62.1. This code prescribes the flow rate of ventilation air that must be supplied mechanically, or otherwise, to occupied areas based on occupancy classifications. Depending on the type of use of a space and total space area, outdoor air flow rates in cubic feet per minute (CFM) per person and square foot are defined when the parameters are known. When total occupants per space are unknown, the code defines occupant density for each classification type in number of occupants per space floor area. The final flow rate in CFM for every occupied space can thus be calculated.

As an alternative to providing outside air mechanically to occupied spaces, the building code also allows for outside air to enter occupied areas naturally through operable windows. If the area of operable windows for an occupied space is at least 4% of the space’s floor area, mechanical ventilation for that space is not required by code. However, although spaces with sufficient operable window area may satisfy code requirements, this is not a realistic way of providing adequate ventilation during periods of cold or hot weather.

The amount of outside air supplied to occupied spaces is important for occupant comfort and health because contaminants generated by people and materials in the space must be removed or they will build up to unhealthy levels. Diluting interior air with outside air reduces the concentration of carbon dioxide, volatile organic compounds (VOCs) along with various airborne viral and bacterial contaminants.

Demand Control Ventilation In certain applications, the amount of outside air delivered to a space can be reduced if occupancy and indoor air quality can be safely monitored and controlled. This is most typically accomplished through monitoring carbon dioxide (CO2) and occupancy sensors in the space, otherwise known as “Demand Control Ventilation” or DCV. As occupancy rises in a space, so does the amount of CO2 as a result of the occupant’s natural respiration and exhalation of CO2. By monitoring CO2 and occupancy status, an HVAC system can reduce the amount of outside air to a zone when levels and occupancy are low. If CO2 levels rise above a certain threshold or occupancy is detected, the HVAC system can then increase the amount of fresh air until the levels fall back below an acceptable level. Having an operational demand control ventilation strategy in place will help reduce energy consumption of a facility while simultaneously ensuring all spaces are achieving the required fresh air requirements.

Project Approach During the review of the school, SES took the following steps to complete the study:

• Develop an IAQ evaluation plan and conduct a kickoff meeting with the client and Trueflow to review the plan, project schedule, access, etc.

• Perform a walkthrough of the building to review the HVAC systems providing ventilation air for a condition assessment of the systems and understand any maintenance issues that may be related.

• Review available documentation for the HVAC systems that includes:

o As-built drawings or original design drawings o O&M documentation for systems performance data o Review any previous testing adjusting and balancing reports from the HVAC systems o Review documentation describing the chronology of known problems, system failures, complaints, and alterations.

• Develop IAQ evaluation documentation for field evaluation of equipment.

• Perform field evaluation of equipment for ventilation sequence of operation and verify calibration of CO2 sensors where used (+/- 50 PPM).

• Review Trueflow’s completed ventilation rate verification sheets for each space for compliance with ASHRAE 62.1

• Review the Trueflow’s completed unit data sheets for each system providing ventilation air for ventilation airflows, filter condition and efficiency, damper conditions and maintenance adequacy.

• Prepare a report that summarizes the verification process, identifies any deficiencies that require correction and any recommendations to address the deficiencies found and next steps.

Participants The participants in the IAQ verification process for this project are identified below.

Owner

West Hartford Public Schools 50 South Main Street West Hartford, CT 06107 Contact: Robert Palmer Email: Robert.palmer@westhartfordct.gov

Engineer

Sustainable Engineering Solutions, LLC 865 Brook Street Rocky Hill, CT 06067 Contact: Jake Lyga, CEM Email: jlyga@sustainable-eng.com

TAB Provider

Trueflow 121 Broadway Street, Suite 1 Colchester, CT 06415 Contact: Bonnie Deschaine Email: bonnie@trueflowct.com

Facility Description Building

Building: Norfeldt Elementary School

Credit: West Hartford News

Location: 35 Barksdale Rd, West Hartford, CT 06117

Building Size (gross): 62,846 ft2 Year Constructed: 1957 Building Use (current): Education

Norfeldt Elementary School is a K-5 elementary school originally opened in September of 1957. The school was named in honor of Eric G. Norfeldt, who widely promoted sportsmanship and character development throughout the district. The school building contains general education classrooms, administrative offices, library/media spaces, a gymnasium, cafeteria, and supporting educational spaces designed to support both academic and social-emotional learning. The campus also includes outdoor recreational and play areas that support elementary physical education and student activities.

Occupancy The building is occupied Monday through Friday between 8 a.m. and 5 p.m. Special events are held on the weekends and after hours as needed for school extracurricular activities. In addition, the school hosts summer school activities during the summer break.

Building Automation System Description The HVAC system is controlled by an SNE building automation system. This system has graphics for several pieces of HVAC equipment and is capable of trending and performing custom control algorithms. Several air handling units and exhaust fans are not on the building automation system.

HVAC Systems Description

Air Handling Units Ventilation air is supplied to the building by eight air handling units consisting of three distinct system configurations: three mixed-air rooftop units (RTUs), four mixed-air air handling units (AHUs), and one 100% outside air energy recovery ventilator

(ERV).

Of the three RTUs, RTU-1 is connected to the building management system (BMS) and is equipped with DX cooling, gas heating, and a variable frequency drive (VFD) to modulate supply fan speed in order to maintain a fixed static pressure setpoint. RTU-1 serves four fan-powered VAV boxes and five standard VAV boxes. The remaining two RTUs serve the portable classroom areas and are standalone packaged units that are not integrated with the BMS.

Four AHUs serve the elementary school spaces. Two units, AHU-1 and AHU-2, serve the north and south gymnasium areas and are connected to the BMS. These units are heating-only systems equipped with outside air and return air dampers, filtration, and variable-speed exhaust fans that modulate based on space temperature and CO₂ concentration. The remaining two AHUs serve the auditorium and music areas and are not connected to the BMS. These units are locally controlled through push-button controls located within the served spaces and are equipped with outside air and return air dampers, filtration, and hot water heating coils.

A single ERV, designated ERV-1, is installed on the roof and serves the office area below. The unit was installed approximately 10–15 years ago as part of a renovation project intended to provide cooling and ventilation to the main office area. ERV-1 is connected to the BMS and includes a duct heater to temper ventilation air downstream of the unit’s integral heat exchanger prior to delivery to the occupied spaces. The unit is capable of operating at both occupied fan speed and elevated high-CO₂ fan speed modes.

Unit Tag Serves Type AHU-1 Gymnasium – North Single Zone Variable Volume AHU-2 Gymnasium - South Single Zone Variable Volume AHU Auditorium / Music Single Zone Constant Volume AHU Auditorium / Music Single Zone Constant Volume

RTU-1 Classroom VAVs Multi-Zone Variable Volume RTU Portable Classrooms Single Zone Constant Volume RTU Portable Classrooms Single Zone Constant Volume

ERV-1 Office Area 100% Outside Air

Air Handling Unit – RTU-1 Air Handling Unit – Graphic – RTU-1

Air Handling Unit – AHU-1 Air Handling Unit – Graphic – AHU-1

Unit Ventilators Unit ventilators with outside air intakes were found in the school. These units mix outside air with return air and heat as needed to satisfy space temperature setpoint. Units are not currently integrated into the BMS.

Exhaust Fans Exhaust fans are located throughout the roof area of the school building. All exhaust fans are controlled via BMS and select exhaust fans have push buttons to temporarily enable.

Recommendations The following recommendations were made based on the review of TAB report, ventilation comparisons to the IMC Minimum Ventilation Rates (2021) and industry best practices. Additional supporting information can be found in the Appendices of the report.

Due to the limited area of focus of the required IAQ verification and this review, SES strongly recommends verifying the condition of all related HVAC equipment components and control functionality outside of the scope of this verification, prior to implementing any modifications to the HVAC systems.

Initial Recommendations

• Recommendation #1: Add Mechanical Ventilation To Unventilated Spaces

• Recommendation #2: Recalibrate VAVs Associated with RTU-1 & Rebalance Outdoor Air

• Recommendation #3: Rebalance Outside Air For AHUs & RTUs

• Recommendation #4: Rebalance Unit Ventilators

• Recommendation #5: Filter Improvement

• Recommendation #6: Rebalance Exhaust Fans

Recommendation #1: Add Mechanical Ventilation To Unventilated Spaces The majority of spaces found throughout the building are not supplied with outdoor ventilation and only meet indoor air quality requirements via operable windows. Although operable windows are an acceptable means of ventilating a space, it is not a recommended method as it requires frequent occupant intervention and exposes the space to unfavorable and unconditioned ventilation air. For this reason, it is recommended that the spaces seen below are equipped with mechanical ventilation through an air handling unit, roof top unit, energy recovery unit or other means.

Room Required OA (CFM) Room Required OA (CFM) Cafeteria 2,075 Room 104A 116

Nurse Office 10 Room 104 411 Nurse

Treatment Area 100 Room 106 332

Music Room 5 321 Staff Lounge 150 Custodial 6 24 Room 200A 27

Room Required OA (CFM) Room Required OA (CFM) Room 7 36 Room 200 284 Room 8 32 Room 202 352

PE Office 21 Room 204 382 Room 111 376 Room 206 332 Room 109 292 Room 208 322 Room 107 316 Room 210 312 Room 105 302 Room 201 294 Room 103 390 Room 203 362 Room 101 352 Room 205 332 Room 100 334 Room 207 382 Room 102 332 Room 209 223

Shared Kitchen Between 100 &

32 Room 211 312

Room 102A 121 Room 212 68 Room 213 312 X X

Recommendation #2: Recalibrate VAVs Associated with RTU-1 & Rebalance Outdoor Air The survey revealed that multiple VAVs/fan powered VAVs served by RTU-1 are uncalibrated. As a result, SES recommends the airflow stations for the VAVs in the following table are recalibrated to ensure that the actual quantity of air supplied to the space matches what is measured by the BMS. Any resulting O&M issues identified should be repaired and a point-to-point checkout should be conducted to ensure the readings shown on the BMS reflect the actual quantity of air delivered to space.

If after recalibration and repairs, the space continues to not meet airflow requirements, it is recommended that the VAV and controller are reviewed for a potential replacement.

Space Min Required Supply Airflow Current Supply Airflow (CFM) Room 1 55 504 Room 2 55 541 Room 3 52 329

Corridor A108 19 0 Media Center 496 228 Media Center 489 110 Room A103 18 38 Room A104 177 0

Once recalibrated, the minimum outside air CFM for RTU-1 should be rebalanced to a position that coincides with the calculated airflow in the table below. This new minimum outside air percentage should then be integrated into BMS programming.

Recommendation #3: Rebalance Outside Air For AHU-1 and Portable Classroom RTUs

In review of the TAB data, measurements reveal that AHU-1 and the two RTUs serving the portable classrooms are not providing the minimum required outdoor airflow. These three units require outdoor air damper rebalancing to increase ventilation air delivery to their respective spaces. The table below identifies the calculated minimum outside airflow for each of the three units required to satisfy ventilation requirements for the spaces based on the spaces size and occupancy. A new minimum outside air damper position should be set to correlate with the calculated minimum outside air value in the table below.

Space Min Required Supply Airflow Current Supply Airflow (CFM) Room A106 283 84

Specialty Classroom 4 76 281

Unit Tag Calculated Min OA (CFM)

RTU-1 1730

Unit Tag Measured Min OA (CFM) Calculated Min OA (CFM)

AHU-1 279 1,380

Left Portable RTU 0 330 Right Portable RTU 0 470

Recommendation #4: Rebalance Unit Ventilators

Two of the three spaces served by unit ventilators require further evaluation to determine the cause of apparent mechanical deficiencies. Based on the testing and balancing (TAB) report, the unit ventilators serving Room 112 and the rear cafeteria area are not providing measurable ventilation air to their respective spaces. While both areas are equipped with operable windows that can provide natural ventilation, reliance on occupant-operated windows is not considered a preferred long-term ventilation strategy. Natural ventilation requires consistent occupant intervention and may introduce unconditioned outdoor air, potentially resulting in occupant discomfort and reduced control over indoor environmental conditions.

Recommendation #5: Filter Improvements Currently all AHUs are equipped with filters below MERV 13. SES recommends replacing and upgrading all final filters to at least MERV 13 for increased filtration efficiency.

Recommendation #6: Rebalance Exhaust Fans During review of TAB data, some bathrooms do not meet exhaust ventilation requirements. Existing conditions involving the exhaust fans should be reviewed, existing conditions include but are not limited to operation of associated exhaust fan, condition of existing exhaust fan, duct condition and more.

Space TAB Measured Exhaust (CFM) Required Exhaust (CFM) Girls BR 0 150 Boys BR 41 250

PE Office BR 0 25

Additional Findings In addition to the above-mentioned recommendations specific to the focus of this program, SES has identified the following operational deficiencies that we recommend are further reviewed and possibly implemented.

Finding #1: Implement Demand Control Ventilation For Air Handling Unit – RTU-1 and AHU-1 & 2 Libraries and gymnasiums are characterized by highly transient occupancy. To accommodate fluctuating ventilation needs, AHUs serving these spaces commonly employ demand control ventilation (DCV) systems. These systems dynamically adjust ventilation rates based on occupancy levels, ensuring optimal indoor air quality (IAQ) while conserving energy during periods of low usage.

SES recommended implementing a demand control ventilation control sequence for each AHU as follows:

1. A space CO2 sensor should be installed for each unit that is not currently equipped with one.

2. A TAB contractor should determine new MIN-OAD and MAX-OAD damper percentages that correspond to the airflows listed in the table below. (Note: Minimum OAD percentage established in R2 & R3 shall be the new MAX- OAD % for RTU-1 and AHU 1 & 2)

3. A sequence should be programmed for the AHUs as follows: “Under normal conditions, the unit operates at the minimum outside air damper position (MIN-OAD). When space CO2 levels exceed the setpoint (to be initially set at 1100ppm), the outside air damper modulates to the maximum damper position (MAX-OAD); subject to a low mixed air temperature of 50°F (adj.). As CO2 levels drop below the setpoint, the damper position returns to MIN-OAD.”

Unit Tag Served MIN-OAD (CFM) MAX-OAD (CFM) AHU-1 Gymnasium

1,380 AHU-2 Gymnasium

1,380 RTU-1 Library

1,730

Next Steps Review Recommendations It is recommended that the client review this report and the proposed recommendations for further clarification, if needed and decide a course of action. SES can provide additional assistance if needed, to further analyze and develop these recommendations for future implementation, and if desired, provide commissioning of the implemented measures.

Appendix A: IAQ Evaluation Sheet

Tag AREA SERVED Type Pre-Filter

Condition

Final Filter

Conditon Unit Condition Outside Air Control Method CO2 Control? Supply Airflow Min. Outside Airflow3 % OA

Summated OA

Airflow

Calculated Min.

Outside Airflow % OA2 Comments

AHU-1 Gymnasium Single Zone Variable Volume - No Access Good Fixed Minimum Yes 2,915 279 10% 1,377 1,380 47%

AHU-2 Gymnasium Single Zone Variable Volume - No Access Good Fixed Minimum Yes 3,532 1,283 36% 1,377 1,380 39%

RTU-1 Library Muti Zone Constant Volume 1 Fair Fixed Minimum No 2,155 55 3% 1,722 1,730 80%

Right Portable RTU Portable 1 Single Zone Constant Volume - No Access Poor Fixed Minimum No 1,614 - 0% 463 470 29%

Left Portable RTU Portable 2 Single Zone Constant Volume - No Access Poor Fixed Minimum No 1,424 - 0% 320 330 23%

Left Auditorium AHU Auditorium Single Zone Constant Volume - 1 Fair Fixed Minimum No 3,744 3,532 94% 806 810 22%

Right Auditorium AHU Auditorium Single Zone Constant Volume - 1 Fair Fixed Minimum No 4,654 2,915 63% 801 810 17%

ERV-1 Main Office Multi Zone Constant Volume - 3 Good Fixed Minimum Yes 501 375 75% 137 140 28%

TAB Measured Filters (1 = clean, 2 = partially loaded, 3 = dirty)

IMC 2021 Ventilation Assessment

Unit Tag Room # Category Infiltration ZoneArea, Az, per space (SF)

Zone

Population, Pz, per space

People OA Rate in

Breathing Zone, Rp

(CFM/person)

Area OA Rate in

Breathing Zone, Ra

(CFM/SF)

Default Occupant

Density

Breathing Zone OA

(CFM) Vbz=RpPz+RaAz

Table 6-2 Zone Air

Distribution

Effectiveness

Zone OA Flow, Voz Min. Ventilation

Airflow (CFM)

Actual Supply

Airflow (CFM)

% OA

Actual Ventilation

Airflow (CFM)

Ventilation Difference

(CFM)

Ventilation

Difference (%)

Code Satisified?

Comments

ERV-1 Main Office Main entry lobbies Yes 382.5 8 5 0.06 10 63 1 63 63 333 75% 249 186 296% Yes

ERV-1 Principal's Office Office spaces Yes 196 9 5 0.06 5 57 1 57 57 92 75% 69 12 22% Yes

ERV-1 Copy Room Office spaces No 126 2 5 0.06 5 18 1 18 18 76 75% 57 39 225% Yes

AHU-1 Gymnasium Spectator areas Yes 2455 164 7.5 0.06 150 1,377 1 1,377 1,377 2915 10% 292 (1,086) -79% Yes*

AHU-2 Gymnasium Spectator areas Yes 2455 164 7.5 0.06 150 1,377 1 1,377 1,377 3532 36% 1272 (106) -8% Yes*

Right Portable RTU Portable 1 Classrooms (ages 9 plus) Yes 855.5 36 10 0.12 35 463 1 463 463 1614 0% 0 (463) -100% Yes*

Left Portable RTU Portable 2 Classrooms (ages 9 plus) Yes 1003 20 10 0.12 35 320 1 320 320 1424 0% 0 (320) -100% Yes*

Left Auditorium AHU Leftside of Auditorium Auditoriums No 1123.5 120 5 0.06 150 667 1 667 667 3744 94% 3532 2,865 429% Yes

Left Auditorium AHU Stage Left Auditoriums No 400 23 5 0.06 150 139 1 139 139 287 94% 271 132 95% Yes

Right Auditorium AHU Right Side of Auditorium Auditoriums No 1123.5 120 5 0.06 150 667 1 667 667 4654 63% 2915 2,248 337% Yes

Right Auditorium AHU Stage Right Auditoriums No 400 22 5 0.06 150 134 1 134 134 120 63% 76 (58) -44% No

Other Cafeteria Cafeteria/fast-food dining Yes 1,860 232 7.5 0.18 100 2,075 1 2,075 2,075 0 0% 0 (2,075) -100% Yes*

Other Nurse Office Office spaces Yes 76.5 1 5 0.06 5 10 1 10 10 0 0% 0 (10) -100% Yes*

Other Nurse Treatment Area Daycare Sickroom Yes 279 5 10 0.18 25 100 1 100 100 0 0% 0 (100) -100% Yes*

Other Music Room 5 Classrooms (ages 5 to 8) Yes 594 25 10 0.12 25 321 1 321 321 0 0% 0 (321) -100% Yes*

Other Custodial 6 Office spaces Yes 155 3 5 0.06 5 24 1 24 24 0 0% 0 (24) -100% Yes*

Other Room 7 Office spaces Yes 186 5 5 0.06 5 36 1 36 36 0 0% 0 (36) -100% Yes*

Other Room 8 Office spaces Yes 120 5 5 0.06 5 32 1 32 32 0 0% 0 (32) -100% Yes*

Other PE Office Office spaces Yes 101 3 5 0.06 5 21 1 21 21 0 0% 0 (21) -100% Yes*

Other Room 111 Classrooms (ages 5 to 8) Yes 852 20 10 0.12 25 302 1 302 302 0 0% 0 (302) -100% Yes*

Other Cubby Room Conference rooms No 230 12 5 0.06 50 74 1 74 74 0 0% 0 (74) -100% No

Other Room 109 Classrooms (ages 5 to 8) Yes 853 19 10 0.12 25 292 1 292 292 0 0% 0 (292) -100% Yes*

Other Room 107 Classrooms (ages 5 to 8) Yes 853 20 10 0.12 25 302 1 302 302 0 0% 0 (302) -100% Yes*

Other Cubby Room Conference rooms No 60 2 5 0.06 50 14 1 14 14 0 0% 0 (14) -100% No

Other Room 105 Classrooms (ages 5 to 8) Yes 853 20 10 0.12 25 302 1 302 302 0 0% 0 (302) -100% Yes*

Other Room 103 Classrooms (ages 5 to 8) Yes 853 20 10 0.12 25 302 1 302 302 0 0% 0 (302) -100% Yes*

Other Cubby Room Conference rooms No 218.5 15 5 0.06 50 88 1 88 88 0 0% 0 (88) -100% No

Other Room 101 Classrooms (ages 5 to 8) Yes 852.5 25 10 0.12 25 352 1 352 352 0 0% 0 (352) -100% Yes*

Other Room 100 Classrooms (ages 5 to 8) Yes 1116 20 10 0.12 25 334 1 334 334 0 0% 0 (334) -100% Yes*

Other Room 102 Classrooms (ages 5 to 8) Yes 1,101 20 10 0.12 25 332 1 332 332 0 0% 0 (332) -100% Yes*

Other Shared Kitchen Between 100 & 102 Kitchen (cooking) No 96 2 7.5 0.18 20 32 1 32 32 0 0% 0 (32) -100% No

Other 102A Classrooms (ages 5 to 8) Yes 341 8 10 0.12 25 121 1 121 121 0 0% 0 (121) -100% Yes*

Other 104A Classrooms (ages 5 to 8) Yes 216 9 10 0.12 25 116 1 116 116 0 0% 0 (116) -100% Yes*

Other 104 Classrooms (ages 5 to 8) Yes 853 22 10 0.12 25 322 1 322 322 0 0% 0 (322) -100% Yes*

Other Cubby Room Conference rooms No 230 15 5 0.06 50 89 1 89 89 0 0% 0 (89) -100% No

Other Room 106 Classrooms (ages 5 to 8) Yes 852.5 23 10 0.12 25 332 1 332 332 0 0% 0 (332) -100% Yes*

Other Staff Lounge Office spaces Yes 410 25 5 0.06 5 150 1 150 150 0 0% 0 (150) -100% Yes*

Other Room 200A Classrooms (ages 5 to 8) Yes 143.5 1 10 0.12 25 27 1 27 27 0 0% 0 (27) -100% Yes*

Other Room 200 Classrooms (ages 5 to 8) Yes 868 18 10 0.12 25 284 1 284 284 0 0% 0 (284) -100% Yes*

Other Room 202 Classrooms (ages 5 to 8) Yes 852.5 25 10 0.12 25 352 1 352 352 0 0% 0 (352) -100% Yes*

Other Room 204 Classrooms (ages 5 to 8) Yes 852.5 28 10 0.12 25 382 1 382 382 0 0% 0 (382) -100% Yes*

Other 206 Classrooms (ages 5 to 8) Yes 853 23 10 0.12 25 332 1 332 332 0 0% 0 (332) -100% Yes*

Other 208 Classrooms (ages 5 to 8) Yes 853 22 10 0.12 25 322 1 322 322 0 0% 0 (322) -100% Yes*

Other 210 Classrooms (ages 5 to 8) Yes 853 21 10 0.12 25 312 1 312 312 0 0% 0 (312) -100% Yes*

Other 201 Classrooms (ages 5 to 8) Yes 868 19 10 0.12 25 294 1 294 294 0 0% 0 (294) -100% Yes*

Other 203 Classrooms (ages 5 to 8) Yes 852.5 26 10 0.12 25 362 1 362 362 0 0% 0 (362) -100% Yes*

Other 205 Classrooms (ages 5 to 8) Yes 853 23 10 0.12 25 332 1 332 332 0 0% 0 (332) -100% Yes*

Other 207 Classrooms (ages 5 to 8) Yes 853 28 10 0.12 25 382 1 382 382 0 0% 0 (382) -100% Yes*

Other 209 Classrooms (ages 5 to 8) Yes 605 15 10 0.12 25 223 1 223 223 0 0% 0 (223) -100% Yes*

Other 211 Classrooms (ages 5 to 8) Yes 853 21 10 0.12 25 312 1 312 312 0 0% 0 (312) -100% Yes*

Other 212 Classrooms (ages 5 to 8) Yes 150 5 10 0.12 25 68 1 68 68 0 0% 0 (68) -100% Yes*

Other 213 Classrooms (ages 5 to 8) Yes 852.5 21 10 0.12 25 312 1 312 312 0 0% 0 (312) -100% Yes*

RTU-1 Room 1 Office spaces Yes 256 8 5 0.06 5 55 1 55 55 504 46% 232 176 319% Yes

RTU-1 Room 2 Office spaces Yes 256 8 5 0.06 5 55 1 55 55 541 46% 249 194 350% Yes

RTU-1 Room 3 Office spaces Yes 201.5 8 5 0.06 5 52 1 52 52 329 46% 151 99 191% Yes

RTU-1 Corridor A108 Corridors No 318 25 0 0.06 0 19 1 19 19 0 46% 0 (19) -100% No

RTU-1 Media Center Media Center Yes 804 40 10 0.12 25 496 1 496 496 228 46% 105 (392) -79% Yes*

RTU-1 Media Center Media Center Yes 741 40 10 0.12 25 489 1 489 489 110 46% 51 (438) -90% Yes*

RTU-1 Room A103 Office spaces No 135 2 5 0.06 5 18 1 18 18 38 46% 17 (1) -3% No

RTU-1 Room A104 Media Center Yes 225 15 10 0.12 25 177 1 177 177 0 46% 0 (177) -100% Yes*

RTU-1 Room A106 Classrooms (ages 9 plus) No 360 24 10 0.12 35 283 1 283 283 84 46% 39 (245) -86% No

RTU-1 Specialty Classroom 4 Kitchen (cooking) No 173.25 6 7.5 0.18 20 76 1 76 76 281 46% 129 53 70% Yes

UV 112 Office spaces Yes 360 8 5 0.06 5 62 1 62 62 0 0% 0 (62) -100% Yes*

UV 113 Office spaces No 310 12 5 0.06 5 79 1 79 79 910 23% 209 131 166% Yes

UV Back Room of Cafeteria Office spaces Yes 880 26 5 0.06 5 183 1 183 183 0 0% 0 (183) -100% Yes*

Room # Category ZoneArea, Az, per space (SF) TAB Exhaust CFM # of Toilets Calc'd Exhaust CFM

Ventilation Difference

(CFM)

Code Satisified? Comments

BR in Specialty Classroom 4 Toilet rooms - private 37.5 112 1 45 67 Yes

Staff BR outside of main office Toilet rooms - private 60 81 1 25 56 Yes

BR in Nurse's Office Toilet rooms - private 33 57 1 25 32 Yes

BR next to custodial office Toilet rooms - private 40 123 1 25 98 Yes

BR across from Nurse's Office Toilet rooms - private 101.25 301 2 50 251 Yes

BR next to Room 8 Toilet rooms - private 108 225 2 50 175 Yes

Girls BR Toilet rooms - public 130.5 0 3 150 (150) No

Boys BR Toilet rooms - public 121.5 41 5 250 (209) No

PE Office BR Toilet rooms - private 20 0 1 25 (25) No

BR across from 111 Toilet rooms - private 51 123 2 50 73 Yes

Left BR Toilet rooms - private 15 112 1 25 87 Yes

Right BR Toilet rooms - private 15 109 1 25 84 Yes

Left BR Toilet rooms - private 15 56 1 25 31 Yes

Right BR Toilet rooms - private 15 40 1 25 15 Yes

Left BR Toilet rooms - private 15 90 1 25 65 Yes

Right BR Toilet rooms - private 15 112 1 25 87 Yes

CubbyRoom/BR Toilet rooms - private 15 203 2 50 153 Yes

Left BR Toilet rooms - private 15 75 1 25 50 Yes

BR in 106 Toilet rooms - private 38.5 76 1 25 51 Yes

BR outside of Staff lounge Toilet rooms - private 59.5 143 1 25 118 Yes

Girls BR next to 204 Toilet rooms - public 242 474 6 300 174 Yes

Boys BR next to 206 Toilet rooms - public 242 400 7 350 50 Yes

BR outside of 212 Toilet rooms - private 48 78 1 25 53 Yes

Appendix B: International Mechanical Code Minimum Ventilation Rates (2021) per ASHRAE 62.1

Minimum Ventilation Rates in Breathing Zone People Outdoor

Air Rate Rp

Area Outdoor Air

Rate Ra

Default Values

(Occupant Density) Air Class OS (6.2.6.1.4) Comments

Occupancy Classification Category cfm/person cfm/sf #/1000sf

Educational Facilities Art Classroom 10 0.18 20 2 No

Educational Facilities Classrooms (ages 5 to 8) 10 0.12 25 1 No

Educational Facilities Classrooms (ages 9 plus) 10 0.12 35 1 No

Educational Facilities Computer Lab 10 0.12 25 1 No

Educational Facilities Daycare Sickroom 10 0.18 25 3 No

Educational Facilities Daycare (through age 4) 10 0.18 25 2 No

Educational Facilities Auditoriums 5 0.06 150 0

Educational Facilities Lecture Classroom 7.5 0.06 65 1 Yes

Per ASHRAE, lecture classrooms are spaces with low space generated emissions and hard surfaces. Little off gassing so reduced levels. Most standard classrooms will be lecture classroom type.

Educational Facilities Lecture hall (fixed seats) 7.5 0.06 150 1 Yes University style (see occupant density)

Educational Facilities Libraries 5 0.12 10 n/a No

Educational Facilities Media Center 10 0.12 25 1 No

Educational Facilities Multiuse assembly 7.5 0.06 100 1 Yes

Educational Facilities Music/theater/dance 10 0.06 35 1 Yes

Educational Facilities Science laboratories 10 0.18 25 2 No

Educational Facilities University/college laboratories 10 0.18 25 2 No

Educational Facilities Sports locker rooms 0 -0.7 0 0 No

Educational Facilities Wood/metal shop 10 0.18 20 2 No

Food and Beverage Bars, cocktail lounges 7.5 0.18 100 2 No

Food and Beverage Cafeteria/fast-food dining 7.5 0.18 100 2 No

Food and Beverage Kitchen (cooking) 7.5 0.18 20 2 No

Food and Beverage Restaurant dining rooms 7.5 0.18 70 2 No

Private Dwellings Toilet rooms - private 0 0 0 0

Offices Conference rooms 5 0.06 50 1 Yes

Offices Main entry lobbies 5 0.06 10 1 Yes

Offices Office spaces 5 0.06 5 1 Yes

Offices Reception areas 5 0.06 30 1 Yes

Offices Telephone/data entry 5 0.06 60 1 Yes

Public spaces Corridors 0 0.06 0

Public spaces Shower room 0 0 0

Public spaces Toilet rooms - public 0 0 0

Public Assembly Spaces Auditorium seating area 5 0.06 150 1 Yes

Public Assembly Spaces Libraries 5 0.12 10 1 No

Public Assembly Spaces Toilet rooms - public 0 0 0

Sports and Entertainment Bowling alley (seating) 10 0.12 40 1 No

Sports and Entertainment Disco/dance floors 20 0.06 100 2 Yes

Sports and Entertainment Gambling casinos 7.5 0.18 120 1 No

Sports and Entertainment Game arcades 7.5 0.18 20 1 No

Sports and Entertainment Gym, sports arena (play area) 20 0.18 7 2 No

Sports and Entertainment Health club/aerobics room 20 0.06 40 2 No

Sports and Entertainment Health club/weight room 20 0.06 10 2 No

Sports and Entertainment Spectator areas 7.5 0.06 150 1 Yes

Sports and Entertainment Stages, studios 10 0.06 70 1 Yes

Sports and Entertainment Swimming (pool and deck) 0 0.48 0 2 No

Minimum Exhaust Rates

Occupancy Classification Category CFM/fixture CFM/SF Comments

Educational Facilities Toilet rooms - public 50 0 20

Educational Facilities Toilet rooms - private 25 0

Educational Facilities Shower rooms 20 0

Educational Facilities Sports locker rooms 0 0.5