ASHRAE-90.1-2022- - Page 025
Extracted Content
and not exceeding a width of 30 ft to either side of the drive aisle centerline and not extending beyond adjacent walls.
parking garage section: a part of a parking garage where airflow is restricted from other parts of the garage by solid walls.
party wall: a fire wall on an interior lot line used or adapted for joint service between two buildings .
PEICL: the pump energy index for a constant load, hp.
PEIVL: the pump energy index for a variable load.
PERCL: the pump energy rating for a constant load, hp, determined in accordance with either testing for bare pumps, pumps sold with single-phase induction motors, and pumps sold with drivers other than electric motors, or testing for pumps sold with motors and rated using the testing-based approach, or testing for pumps sold with motors and rated using the calculation-based approach.
PERSTD: the PERCL for a pump that is minimally compliant with U.S. DOE energy conservation standards with the same flow and specific speed characteristics as the tested pump (hp).
PERVL: the pump energy rating for a variable load, hp, determined in accordance with testing for pumps sold with motors and continuous or noncontinuous controls rated using the testing-based approach, or testing for pumps sold with motors and continuous controls rated using the calculation-based approach.
Performance Rating Method: a calculation procedure that generates an index of merit for the performance of building designs that substantially exceeds the energy efficiency levels required by this standard or when using the Performance Rating Method as an alternative path for minimum standard compliance in accordance with Section 4.2.1.1.
permanently installed: equipment that is fixed in place and is not portable or movable.
photosensor: a device that detects the presence of visible light, infrared (IR) transmission, and/or ultraviolet (UV) energy .
photosynthetic photon efficacy (PPE): photosynthetic photon flux emitted by a light source between 400 and 700 nm divided by its electrical input power, expressed in units of micromoles per joule as defined by ANSI/ ASABE S640-2017.
piping: the pipes or tubes interconnecting the various parts of a fluid distribution system, including all elements that are in series with the fluid flow, such as pumps, valves, strainers, and air separators, but not including elements that are not in series with the fluid flow, such as expansion tanks, fill lines, chemical feeders, and drains.
plenum: a compartment or chamber to which one or more ducts are connected, that forms a part of the air distribution system, and that is not used for occupancy or storage. A plenum often is formed in part or in total by portions of the building .
point thermal bridge: see thermal bridge.
pool: any structure, basin, or tank containing an artificial body of water for swimming, diving, or recreational bathing. The term includes (but is not limited to) swimming pools, whirlpools, spas, and hot tubs.
power roof/wall ventilators (PRV): a fan consisting of a centrifugal or axial impeller with an integral driver in a weather-resistant housing and with a base designed to fit, usually by means of a curb, over a wall or roof opening.
primary sidelighted area: see daylight area .
process application: a manufacturing, industrial, or commercial procedure or activity where the primary purpose is other than conditioning spaces and maintaining comfort and amenities for the occupants of a building .
process energy: energy consumed in support of a process application .
process load: the load on a building resulting from the consumption or release of process energy .
projection factor (PF): the ratio of the horizontal depth of the external shading projection divided by the sum of the height of the fenestration and the distance from the top of the fenestration to the bottom of the farthest point of the external shading projection, in consistent units.
property: building or site.
proposed building performance: the annual energy cost calculated for a proposed design .
ANSI/ASHRAE/IES Standard 90.1-2022 (I-P) 23