Heating, Ventilating, and Air-Conditioning

FI VAC ductwork and related equipment should conform to the reqnirement of NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems. Note that NFPA 90B referenced in NFPA 101 is not applicable to healthcare facilities. 

NFPA 90A prohibits means of egress corridors in healthcare occnpancies from being ntilized as a portion of supply-air, return-air, or exhaust-air systems serving adjoining areas. Conunercial cooking equipment should conform to requirements of NFPA 96, Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations. 

The requirement does not apply to consumer-type domestic appliances used for warming food or for limited cooking such as in break and nutrition rooms. Ventilating systems found in labs should conform to requirements found in NFPA 45. 

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R. W. Haines, Control Systems for Heating Ventilating and Air Conditioning, Van Nostrand-Reinhold, New York, 4th ed., 1987. 

I oise Transmission Reduction in HVACSystems. One common use of sound-absorbing treatment is to reduce noise transmission in heating, ventilating, and air-conditioning (HVAC) systems (6). The treatments ate used to reduce the transmission of fan noise and air turbulence noise through ducts into occupied spaces. Noise transmission reduction in duct systems is described in terms of insertion loss, the difference in sound power level or sound pressure level measured at a given location before and after installation of the treatment or sound attenuation, the reduction in sound power between two locations affected by a sound source. The units ate decibels. 

HVAC The heating, ventilation and air conditioning system that circulates and delivers filtered, humidified or dehumidified, and cooled or warmed air to the interior of a building. 

Conditioning Engineers. (1996). ASHRAE Handbook Heating, Ventilating, and Air Conditioning Systems and Equipment. Atlanta Author. 

Chartered Institution ofBuildiiig Seivices Engineers. (1994). The International Dictionary of Heating, Ventilating, and Air Conditioning. London Author. 

Howell, R. Saner, H. and Coad, W. (1998). Principles of Heating, Ventilating and Air Conditioning. Atlanta ASHRAE, Inc. 

Trethwiey, Richard. (1994). This Old House Heating, Ventilation, and Air Conditioning. Boston Little, Brown. Weinberger, Herbert. (1992). Residential Oil Burners. Albany, NY Delmar Publishers. 

Figure 12-142. ASHVE Friction chart for air in duct. (Used by permission Heating, Ventilating and Air Conditioning Guide, 1949. American Society of Heating and Ventilating Engineers, reprinted with permission Air Movement and Control Association International, Inc. All rights reserved.)...

Compact and quiet running. Used on heating, ventilation and air-conditioning work... 

In heating, ventilation, and air-conditioning (HVAC) system designs, the hydronic heating systems also may incorporate cooling or chilled water circuits, laid out as two-pipe or four-pipe systems. These terms typically refer to ... 

HEPA HVAC high-efficiency particulate air heating, ventilation, and air conditioning... 

Point Release Versus Attack on the Heating, Ventilation, and Air Conditioning System... 

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