ASHRAE-90.1-2022- - Page 037
Extracted Content
PPE photosynthetic photon efficacy
PRV power roof/wall ventilator
PSZ-AC packaged single-zone air conditioner
PSZ-HP packaged single-zone heat pump
PTAC packaged terminal air conditioner
PTHP packaged terminal heat pump
R R-value ( thermal resistance )
RAT return air temperature (dry-bulb unless wet-bulb is specified)
Rc thermal resistance of a material or construction from surface to surface
RCR room cavity ratio
Ru total thermal resistance of a material or construction including air film resistances
rpm revolutions per minute
RSV radially split, multistage, vertical, inline diffuser casing
SAT supply air temperature (dry-bulb unless wet-bulb is specified)
SC shading coefficient
SEER / SEER2 seasonal energy efficiency ratio
SERR series energy recovery ratio
SHGC solar heat gain coefficient
SHW service hot water
SL standby loss
SMACNA Sheet Metal and Air Conditioning Contractors’ National Association
SPVAC single-package vertical air conditioner
SPVHP single-package vertical heat pump
ST submersible turbine
SZ single zone
Tdb dry-bulb temperature
TDA total display area
TSPR total system performance ratio
TSPRp TSPR of a proposed design
TSPRr TSPR of a TSPR reference building design
Twb wet-bulb temperature
UPS uninterruptible power supply
VAV variable air volume
VRF variable refrigerant flow
VSD variable-speed drive
VT visible transmittance (also known as visible light transmittance [VLT])
V&T verification and testing
W watt
wb wet-bulb
W/ft [2] watts per square foot
WF well factor
Wh watt-hour
ANSI/ASHRAE/IES Standard 90.1-2022 (I-P) 35