233100 3-13 HVAC DUCTS AND CASINGS .docx
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- Solicitation number
- 36C25621R0013
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This document contains a solicitation for a construction project and a related summary of work. The solicitation is for Project 629-18-127 to remodel a pharmacy compounding area and build a new segregated compounding area at the Southeast Louisiana Veterans Health Care System in New Orleans to meet USP 800 requirements. The project value is between $1,000,000 to $5,000,000. The solicitation is a 100% set-aside for service-disabled veteran-owned small businesses, who must be verified in VetBiz. The work includes supervision, labor, materials, tools and equipment to remodel the current pharmacy compounding area and build a new segregated compounding area as a backup. The NAICS code is 236220 and small business size standard is $39.5 million. The work location is New Orleans, Louisiana. The Department of Veterans Affairs Veterans Health Administration VISN 16 is the contracting agency.
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Renovate Pharmacy for USP 800 Requirements 03-01-13 VAMC New Orleans, LA
SECTION 23 31 00
HVAC DUCTS AND CASINGS
PART 1 GENERAL
1.1 DESCRIPTION
| A. | Ductwork and accessories for HVAC including the following: |
| 1. | Supply air, return air and exhaust systems. |
| 2. | Exhaust duct for biological safety cabinets. |
| B. | Definitions: |
| 1. | SMACNA Standards as used in this specification means the HVAC Duct Construction Standards, Metal and Flexible. |
| 2. | Seal or Sealing: Use of liquid or mastic sealant, with or without compatible tape overlay, or gasketing of flanged joints, to keep air leakage at duct joints, seams and connections to an acceptable minimum. |
| 3. | Duct Pressure Classification: SMACNA HVAC Duct Construction Standards, Metal and Flexible. |
| 4. | Exposed Duct: Exposed to weather. |
1.2 RELATED WORK
| A. | Section 07 84 00, FIRESTOPPING: Fire Stopping Material. |
| B. | Section 23 05 11, COMMON WORK RESULTS FOR HVAC: General Mechanical Requirements. |
| C. | Section 23 05 41, NOISE AND VIBRATION CONTROL FOR HVAC PIPING and EQUIPMENT: Noise Level Requirements. |
| D. | Section 23 05 93, TESTING, ADJUSTING, and BALANCING FOR HVAC: Testing and Balancing of Air Flows. |
| E. | Section 23 07 11, HVAC and BOILER PLANT INSULATION: Duct Insulation. |
| F. | Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC: Duct Mounted Instrumentation. |
| G. | Section 23 34 00, HVAC FANS: Return Air and Exhaust Air Fans. |
| H. | Section 23 40 00, HVAC AIR CLEANING DEVICES: Air Filters and Filters' Efficiencies. |
| I. | Section 23 74 13, PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING UNITS: Supply Air Fans. |
| J. | Section 23 82 16, AIR COILS: Duct Mounted Coils. |
| K. | Section 28 31 00, FIRE DETECTION and ALARM: Smoke Detectors. |
1.3 QUALITY ASSURANCE
| A. | Refer to article, QUALITY ASSURANCE, in Section 23 05 11, COMMON WORK RESULTS FOR HVAC. |
| B. | Fire Safety Code: Comply with NFPA 90A. |
| C. | Duct System Construction and Installation: Referenced SMACNA Standards are the minimum acceptable quality. |
| D. | Duct Sealing, Air Leakage Criteria, and Air Leakage Tests: Ducts shall be sealed as per duct sealing requirements of SMACNA HVAC Air Duct Leakage Test Manual for duct pressure classes shown on the drawings. |
| E. | Duct accessories exposed to the air stream, such as dampers of all types (except smoke dampers) and access openings, shall be of the same material as the duct or provide at least the same level of corrosion resistance. |
1.4 SUBMITTALS
| A. | Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES. |
| B. | Manufacturer's Literature and Data: |
| 1. | Rectangular ducts: |
| a. | Schedules of duct systems, materials and selected SMACNA construction alternatives for joints, sealing, gage and reinforcement. |
| b. | Sealants and gaskets. |
| c. | Access doors. |
| d. | Instrument test ports. |
| 2. | Round and flat oval duct construction details: |
| a. | Manufacturer's details for duct fittings. |
| b. | Sealants and gaskets. |
| c. | Access sections. |
| d. | Instrument test ports. |
| e. | Installation instructions. |
| 3. | Volume dampers, back draft dampers. |
| 4. | Upper hanger attachments. |
| 5. | Fire dampers, fire doors, and smoke dampers with installation instructions. |
| 6. | Flexible ducts and clamps, with manufacturer's installation instructions. |
| 7. | Flexible connections. |
| 8. | Instrument test fittings. |
| 9. | Details and design analysis of alternate or optional duct systems. |
| C. | Samples: Provide one complete sample of remotely adjustable volume balancing damper including damper, worm drive, drive shaft, and adjustment termination. |
| D. | Coordination Drawings: Refer to article, SUBMITTALS, in Section 23 05 11, COMMON WORK RESULTS FOR HVAC. |
| E. | Shop drawing and catalog parts list of all components for DOP Injection Port detailed on drawings. |
1.5 APPLICABLE PUBLICATIONS
| A. | The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only. |
| B. | American Society for Testing and Materials (ASTM): |
| A16799 withdrawn | Standard Specification for Stainless and HeatResisting ChromiumNickel Steel Plate, Sheet, and Strip |
| A653/A653M-2017 | Standard Specification for Steel Sheet, ZincCoated (Galvanized) or Zinc-Iron AlloyCoated (Galvannealed) by the Hot-Dip Process |
| B2092014 | Standard Specification for Aluminum and AluminumAlloy Sheet and Plate |
| C. | National Fire Protection Association (NFPA): |
| 90A-2018 | Standard for the Installation of AirConditioning and Ventilating Systems |
| D. | Sheet Metal and Air Conditioning Contractors National Association (SMACNA): |
| 2005 | HVAC Duct Construction Standards - Metal and Flexible, 3rd Edition |
| 2012 | HVAC Air Duct Leakage Test Manual, 2nd Edition |
| 2003 | Fibrous Glass Duct Construction Standards, 7th Edition |
| E. | Underwriters Laboratories, Inc. (UL): |
| 1812013 | Standard for FactoryMade Air Ducts and Air Connectors |
| 5552006 (R2014) | Standard for Fire Dampers |
| 555S2014 | Standard for Smoke Dampers |
PART 2 PRODUCTS
2.1 DUCT MATERIALS AND SEALANTS
| A. | General: Except for systems specified otherwise, construct ducts, casings, and accessories of galvanized sheet steel, A653/A653M, coating G90; or, aluminum sheet, ASTM B209, alloy 1100, 3003 or 5052. |
| B. | Specified Corrosion Resistant Systems: Stainless steel sheet, ASTM A167, Class 302 or 304, Condition A (annealed) Finish No. 4 for exposed ducts and Finish No. 2B for concealed duct or ducts located in mechanical rooms. |
| C. | Joint Sealing: Refer to SMACNA HVAC Duct Construction Standards, paragraph S1.9. |
| 1. | Sealant: Elastomeric compound, gun or brush grade, maximum 25 flame spread and 50 smoke developed (dry state) compounded specifically for sealing ductwork as recommended by the manufacturer. Generally provide liquid sealant, with or without compatible tape, for low clearance slip joints and heavy, permanently elastic, mastic type where clearances are larger. Oil base caulking and glazing compounds are not acceptable because they do not retain elasticity and bond. |
| 2. | Tape: Use only tape specifically designated by the sealant manufacturer and apply only over wet sealant. Pressure sensitive tape shall not be used on bare metal or on dry sealant. |
| 3. | Gaskets in Flanged Joints: Soft neoprene. |
| D. | Approved factory made joints may be used. |
2.2 DUCT CONSTRUCTION AND INSTALLATION
| A. | Regardless of the pressure classifications outlined in the SMACNA Standards, fabricate and seal the ductwork in accordance with the following pressure classifications: |
| B. | Duct Pressure Classification: |
| 0 to 50 mm (2 inch) |
> 50 mm to 75 mm (2 inch to 3 inch) > 75 mm to 100 mm (3 inch to 4 inch) Show pressure classifications on the floor plans.
| C. | Seal Class: All ductwork shall receive Class A Seal. |
| D. | Biological Safety Cabinet, H12, Hood Exhaust and Associated Ductwork: 1.3 mm (18 gage) all welded stainless steel. |
| E. | Round and Flat Oval Ducts: Furnish duct and fittings made by the same manufacturer to insure good fit of slip joints. When submitted and approved in advance, round and flat oval duct, with size converted on the basis of equal pressure drop, may be furnished in lieu of rectangular duct design shown on the drawings. |
| 1. | Elbows: Diameters 80 through 200 mm (3 through 8 inches) shall be two sections die stamped, all others shall be gored construction, maximum 18 degree angle, with all seams continuously welded or standing seam. Coat galvanized areas of fittings damaged by welding with corrosion resistant aluminum paint or galvanized repair compound. |
| 2. | Provide bell mouth, conical tees or taps, laterals, reducers, and other low loss fittings as shown in SMACNA HVAC Duct Construction Standards. |
| 3. | Ribbed Duct Option: Lighter gage round/oval duct and fittings may be furnished provided certified tests indicating that the rigidity and performance is equivalent to SMACNA standard gage ducts are submitted. |
| a. | Ducts: Manufacturer's published standard gage, G90 coating, spiral lock seam construction with an intermediate standing rib. |
| b. | Fittings: May be manufacturer's standard as shown in published catalogs, fabricated by spot welding and bonding with neoprene base cement or machine formed seam in lieu of continuous welded seams. |
| 4. | Provide flat side reinforcement of oval ducts as recommended by the manufacturer and SMACNA HVAC Duct Construction Standard S3.13. Because of high pressure loss, do not use internal tierod reinforcement unless approved by the COR. |
| F. | Casings and Plenums: Construct in accordance with SMACNA HVAC Duct Construction Standards Section 6, including curbs, access doors, pipe penetrations, eliminators and drain pans. Access doors shall be hollow metal, insulated, with latches and door pulls, 500 mm (20 inches) wide by 1200 - 1350 mm (48 54 inches) high. Provide view port in the doors where shown. Provide drain for outside air louver plenum. Outside air plenum shall have exterior insulation. Drain piping shall be routed to the nearest floor drain. |
| G. | Volume Dampers: Single blade or opposed blade, multilouver type as detailed in SMACNA Standards. Refer to SMACNA Detail Figure 2-12 for Single Blade and Figure 2.13 for Multi-blade Volume Dampers. |
| H. | Remotely Adjustable Volume Dampers: |
| 1. | Damper assembly as specified above in item 2.2-G. |
| 2. | Operator self-locking gear and worm gear assembly with vertical drive shaft. |
| 3. | Drive shaft: Multi-stranded flexible steel shaft rated at 50 lbs of torque. Shaft shall connect operator to drive terminal. Length as needed. |
| 4. | Drive terminal: Drive shaft attached to steel C bracket that is fastened to ceiling framing system allowing turning of drive shaft by TAB contractor with 1/4 inch socket from below ceiling. Provide cap in ceiling access hole when installed above hard ceilings. |
| I. | Duct Hangers and Supports: Refer to SMACNA Standards Section IV. Avoid use of trapeze hangers for round duct. |
2.3 DUCT ACCESS DOORS, PANELS AND SECTIONS
| A. | Provide access doors, sized and located for maintenance work, upstream, in the following locations: |
| 1. | Each duct mounted coil and humidifier. |
| 2. | Each fire damper (for link service), smoke damper and automatic control damper. |
| 3. | Each duct mounted smoke detector. |
| B. | Openings shall be as large as feasible in small ducts, 300 mm by 300 mm (12 inch by 12 inch) minimum where possible. Access sections in insulated ducts shall be doublewall, insulated. All doors shall be of the gasketed clamping type with hand operated star knobs to tighten and loosen the mounting clamps. |
2.4 DUCT INSTRUMENT TEST PORTS
A. Cast zinc alloy construction with heavy gauge zine plated screw on cap. Minimum 1” port opening, 1” extension for uninsulated duct, 2” extension for insulated duct. Provide with flat neoprene mounting gasket.
2.5 FIRE DAMPERS
| A. | Galvanized steel, interlocking blade type, UL listing and label, 11/2 hour rating, 70 degrees C (160 degrees F) fusible line, 100 percent free opening with no part of the blade stack or damper frame in the air stream. |
| B. | Fire dampers in wet air exhaust shall be of stainless steel construction, all others may be galvanized steel. |
| C. | Minimum requirements for fire dampers: |
| 1. | The damper frame may be of design and length as to function as the mounting sleeve, thus eliminating the need for a separate sleeve, as allowed by UL 555. Otherwise provide sleeves and mounting angles, minimum 1.9 mm (14 gage), required to provide installation equivalent to the damper manufacturer's UL test installation. |
| 2. | Submit manufacturer's installation instructions conforming to UL rating test. |
2.6 SMOKE DAMPERS
| A. | Maximum air velocity, through free area of open damper, and pressure loss: Low pressure and medium pressure duct (supply, return, exhaust, outside air): 450 m/min (1500 fpm). Maximum static pressure loss: 32 Pa (0.13 inch W.G.). |
| B. | Maximum air leakage, closed damper: 0.32 cubic meters /min/square meter (4.0 CFM per square foot) at 750 Pa (3 inch W.G.) differential pressure. |
| C. | Minimum requirements for dampers: |
| 1. | Shall comply with requirements of Table 6-1 of UL 555S, except for the Fire Endurance and Hose Stream Test. |
| 2. | Frame: Galvanized steel channel with side, top and bottom stops or seals. |
| 3. | Blades: Galvanized steel, parallel type preferably, 300 mm (12 inch) maximum width, edges sealed with neoprene, rubber or felt, if required to meet minimum leakage. Airfoil (streamlined) type for minimum noise generation and pressure drop are preferred for duct mounted dampers. |
| 4. | Shafts: Galvanized steel. |
| 5. | Bearings: Nylon, bronze sleeve or ball type. |
| 6. | Hardware: Zinc plated. |
| 7. | Operation: Automatic open/close. No smoke damper that requires manual reset or link replacement after actuation is acceptable. See drawings for required control operation. |
| D. | Motor operator (actuator): Provide pneumatic or electric as required by the automatic control system, externally mounted on stand-offs to allow complete insulation coverage. |
2.7 COMBINATION FIRE AND SMOKE DAMPERS
A. Combination fire and smoke dampers: Multiblade type units meeting all requirements of both fire dampers and smoke dampers shall be used where shown and may be used at the Contractor's option where applicable.
2.8 FIRE DOORS
A. Galvanized steel, interlocking blade type, UL listing and label, 71 degrees C (160 degrees F) fusible link, 3 hour rating and approved for openings in Class A fire walls with rating up to 4 hours, 100 percent free opening with no part of the blade stack or damper frame in the air stream.
2.9 FLEXIBLE AIR DUCT
| A. | General: Factory fabricated, complying with NFPA 90A for connectors not passing through floors of buildings. Flexible ducts shall not penetrate any fire or smoke barrier which is required to have a fire resistance rating of one hour or more. Flexible duct length shall not exceed 1.5 m (5 feet). Provide insulated acoustical air duct connectors in supply air duct systems and elsewhere as shown. |
| B. | Flexible ducts shall be listed by Underwriters Laboratories, Inc., complying with UL 181. Ducts larger than 200 mm (8 inches) in diameter shall be Class 1. Ducts 200 mm (8 inches) in diameter and smaller may be Class 1 or Class 2. |
| C. | Insulated Flexible Air Duct: Factory made including mineral fiber insulation with maximum C factor of 0.25 at 24 degrees C (75 degrees F) mean temperature, encased with a low permeability moisture barrier outer jacket, having a puncture resistance of not less than 50 Beach Units. Acoustic insertion loss shall not be less than 3 dB per 300 mm (foot) of straight duct, at 500 Hz, based on 150 mm (6 inch) duct, of 750 m/min (2500 fpm). |
| D. | Application Criteria: |
| 1. | Temperature range: -18 to 93 degrees C (0 to 200 degrees F) internal. |
| 2. | Maximum working velocity: 1200 m/min (4000 feet per minute). |
| 3. | Minimum working pressure, inches of water gage: 2500 Pa (10 inches) positive, 500 Pa (2 inches) negative. |
| E. | Duct Clamps: 100 percent nylon strap, 80 kg (175 pounds) minimum loop tensile strength manufactured for this purpose or stainless steel strap with cadmium plated worm gear tightening device. Apply clamps with sealant and as approved for UL 181, Class 1 installation. |
2.10 FLEXIBLE DUCT CONNECTIONS
A. Where duct connections are made to fans and air handling units, install a noncombustible flexible connection of 822 g (29 ounce) neoprene coated fiberglass fabric approximately 150 mm (6 inches) wide. For connections exposed to sun and weather provide hypalon coating in lieu of neoprene. Burning characteristics shall conform to NFPA 90A. Securely fasten flexible connections to round ducts with stainless steel or zinccoated iron draw bands with worm gear fastener. For rectangular connections, crimp fabric to sheet metal and fasten sheet metal to ducts by screws 50 mm (2 inches) on center. Fabric shall not be stressed other than by air pressure. Allow at least 25 mm (one inch) slack to insure that no vibration is transmitted.
2.11 PREFABRICATED ROOF CURBS
A. Galvanized steel or extruded aluminum 300 mm (12 inches) above finish roof service, continuous welded corner seams, treated wood nailer, 40 mm (11/2 inch) thick, 48 kg/cubic meter (3 pound/cubic feet) density rigid mineral fiberboard insulation with metal liner, builtin cant strip (except for gypsum or tectum decks). For surface insulated roof deck, provide raised cant strip (recessed mounting flange) to start at the upper surface of the insulation. Curbs shall be constructed for pitched roof or ridge mounting as required to keep top of curb level.
2.12 FIRESTOPPING MATERIAL
A. Refer to Section 07 84 00, FIRESTOPPING.
2.13 DUCT MOUNTED TEmperature sensor (AIR)
A. Refer to Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC.
2.14 INSTRUMENT TEST FITTINGS
| A. | Manufactured type with a minimum 50 mm (two inch) length for insulated duct, and a minimum 25 mm (one inch) length for duct not insulated. Test hole shall have a flat gasket for rectangular ducts and a concave gasket for round ducts at the base, and a screw cap to prevent air leakage. |
| B. | Provide instrument test holes at each duct or casing mounted temperature sensor or transmitter, and at entering and leaving side of each heating coil, cooling coil, and heat recovery unit. |
part 3 - execution
3.1 INSTALLATION
| A. | Comply with provisions of Section 23 05 11, COMMON WORK RESULTS FOR HVAC, particularly regarding coordination with other trades and work in existing buildings. |
| B. | Fabricate and install ductwork and accessories in accordance with referenced SMACNA Standards: |
| 1. | Drawings show the general layout of ductwork and accessories but do not show all required fittings and offsets that may be necessary to connect ducts to equipment, boxes, diffusers, grilles, etc., and to coordinate with other trades. Fabricate ductwork based on field measurements. Provide all necessary fittings and offsets at no additional cost to the government. Coordinate with other trades for space available and relative location of HVAC equipment and accessories on ceiling grid. Duct sizes on the drawings are inside dimensions which shall be altered by Contractor to other dimensions with the same air handling characteristics where necessary to avoid interferences and clearance difficulties. |
| 2. | Provide duct transitions, offsets and connections to dampers, coils, and other equipment in accordance with SMACNA Standards, Section II. Provide streamliner, when an obstruction cannot be avoided and must be taken in by a duct. Repair galvanized areas with galvanizing repair compound. |
| 3. | Provide bolted construction and tierod reinforcement in accordance with SMACNA Standards. |
| 4. | Construct casings, eliminators, and pipe penetrations in accordance with SMACNA Standards, Chapter 6. Design casing access doors to swing against air pressure so that pressure helps to maintain a tight seal. |
| C. | Install duct hangers and supports in accordance with SMACNA Standards, Chapter 4. |
| D. | Install fire dampers, smoke dampers and combination fire/smoke dampers in accordance with the manufacturer's instructions to conform to the installation used for the rating test. Install fire dampers, smoke dampers and combination fire/smoke dampers at locations indicated and where ducts penetrate fire rated and/or smoke rated walls, shafts and where required by the COR. Install with required perimeter mounting angles, sleeves, breakaway duct connections, corrosion resistant springs, bearings, bushings and hinges per UL and NFPA. Demonstrate resetting of fire dampers and operation of smoke dampers to the COR. |
| E. | Seal openings around duct penetrations of floors and fire rated partitions with fire stop material as required by NFPA 90A. |
| F. | Flexible duct installation: Flexible duct shall not be used in supply and exhaust duct systems serving new compounding rooms. Refer to SMACNA Standards, Chapter 3. Ducts shall be continuous, single pieces not over 1.5 m (5 feet) long (NFPA 90A), as straight and short as feasible, adequately supported. Centerline radius of bends shall be not less than two duct diameters. Make connections with clamps as recommended by SMACNA. Clamp per SMACNA with one clamp on the core duct and one on the insulation jacket. Flexible ducts shall not penetrate floors, or any chase or partition designated as a fire or smoke barrier, including corridor partitions fire rated one hour or two hour. Support ducts SMACNA Standards. |
| G. | Where diffusers, registers and grilles cannot be installed to avoid seeing inside the duct, paint the inside of the duct with flat black paint to reduce visibility. |
| H. | Remotely operated volume damper installation: Provide remotely operated volume dampers at all volume damper locations in spaces that have hard ceilings. Locate the remotely operated damper drive terminal (adjustment socket) on the hard ceiling as near as possible to the diffuser or grill which it adjusts. |
| I. | Coordinate with DOP Test Contractor and provide quantity of instrument test ports as required to accurately test HEPA filters. |
| J. | Control Damper Installation: |
| 1. | Provide necessary blankoff plates required to install dampers that are smaller than duct size. Provide necessary transitions required to install dampers larger than duct size. |
| 2. | Assemble multiple sections dampers with required interconnecting linkage and extend required number of shafts through duct for external mounting of damper motors. |
| 3. | Provide necessary sheet metal baffle plates to eliminate stratification and provide air volumes specified. Locate baffles by experimentation, and affix and seal permanently in place, only after stratification problem has been eliminated. |
| 4. | Install all damper control/adjustment devices on stand-offs to allow complete coverage of insulation. |
| K. | Air Flow Measuring Devices (AFMD): Install units with minimum straight run distances, upstream and downstream as recommended by the manufacturer. |
| L. | Protection and Cleaning: Deliver all duct to site in shrink wrapped plastic. Do not take off wrap until ready to install duct. After duct is installed wipe interior clean prior to installation of next section. Finally, dust seal openings prior to leaving work area. Adequately protect equipment and materials against physical damage. Place equipment in first class operating condition, or return to source of supply for repair or replacement, as determined by COR. Protect equipment and ducts during construction against entry of foreign matter to the inside and clean both inside and outside before operation and painting. |
3.2 DUCT LEAKAGE TESTS AND REPAIR
| A. | Ductwork leakage testing shall be performed by the Testing and Balancing Contractor directly contracted by the General Contractor and independent of the Sheet Metal Contractor. |
| B. | Ductwork leakage testing shall be performed for the entire air distribution system (including all supply, return, exhaust and relief ductwork), section by section, including fans, coils and filter sections. |
| C. | Test procedure, apparatus and report shall conform to SMACNA Leakage Test manual. The maximum leakage rate allowed is 4 percent of the design air flow rate. |
| D. | All ductwork shall be leak tested first before enclosed in a shaft or covered in other inaccessible areas. |
| E. | All tests shall be performed in the presence of the COR and the Test and Balance agency. The Test and Balance agency shall measure and record duct leakage and report to the COR and identify leakage source with excessive leakage. |
| F. | If any portion of the duct system tested fails to meet the permissible leakage level, the Contractor shall rectify sealing of ductwork to bring it into compliance and shall retest it until acceptable leakage is demonstrated to the COR. |
| G. | All tests and necessary repairs shall be completed prior to insulation or concealment of ductwork. |
| H. | Make sure all openings used for testing flow and temperatures by TAB Contractor are sealed properly. |
3.3 ductwork exposed to wind velocity A. Provide additional support and bracing to all exposed ductwork installed on the roof or outside the building to withstand wind velocity of 145 km/h (90 mph).
3.4 testing, adjusting and balancing (tab) A. Refer to Section 23 05 93, TESTING, ADJUSTING, and BALANCING FOR HVAC.
3.5 operating and performance tests A. Refer to Section 23 05 11, COMMON WORK RESULTS FOR HVAC.
E N D 23 31 00 - 1
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