ASHRAE-90.1-2022- - Page 022
Extracted Content
single-phase applications, kVA is the product of the line current (amperes) times the nominal system voltage (kilovolts).
kilowatt (kW): the basic unit of electric power, equal to 1000 W.
labeled: equipment or materials to which a symbol or other identifying mark has been attached by the manu- facturer indicating compliance with specified standards or performance in a specified manner.
lamp: a generic term for a man-made light source, often called a “bulb” or “tube.”
high-intensity discharge (HID) lamp: an electric discharge lamp in which light is produced when an electric arc is discharged through a vaporized metal such as mercury or sodium. Some HID lamps may also have a phosphor coating that contributes to the light produced or enhances the light color.
light-to-solar-gain ratio (LSG): the ratio of the center-of-glass visible transmittance to the center-of-glass solar heat gain coefficient .
lighting, decorative: lighting that is ornamental or installed for aesthetic effect. Decorative lighting shall not include general lighting .
lighting, general: lighting that provides a substantially uniform level of illumination throughout an area. General lighting shall not include decorative lighting or lighting that provides a dissimilar level of illumination to serve a specialized application or feature within such area.
lighting, horticultural: electric lighting used for horticultural production, cultivation, or maintenance with either plug-in or hard-wired connections for electric power.
lighting power allowance (LPA), exterior: the maximum lighting power in watts allowed for the exterior of a property .
lighting power allowance (LPA), interior: the maximum lighting power in watts allowed for the interior of a building .
lighting power density (LPD): the lighting power per unit area of a building, space, or outdoor area expressed in W/ft [2] .
lighting system: a group of luminaires circuited or controlled to perform a specific function.
liner system (Ls): a continuous vapor barrier liner installed below the purlins and uninterrupted by framing members.
linear thermal bridge: see thermal bridge.
low-rise residential buildings: single-family houses, multifamily structures of three stories or fewer above grade, manufactured houses (mobile homes), and manufactured houses (modular).
lumen maintenance: a lighting control strategy that increases light source power over time to maintain light levels as sources age, dirt accumulates in luminaires, or both. Also known as “lumen depreciation compensation” or “constant lumen output.”
luminaire: a complete lighting unit consisting of a lamp or lamps together with the housing designed to distribute the light, position and protect the lamps, and connect the lamps to the power supply.
makeup air (dedicated replacement air): outdoor air deliberately brought into the building from the outside and supplied to the vicinity of an exhaust hood to replace air, vapor, and contaminants being exhausted. Makeup air is generally filtered and fan-forced, and it may be heated or cooled depending on the requirements of the application. Makeup air may be delivered through outlets integral to the exhaust hood or through outlets in the same room.
manual (nonautomatic): requiring personal intervention for control. Nonautomatic does not necessarily imply a manual controller, only that personal intervention is necessary. (See automatic .)
manufacturer: the company engaged in the original production and assembly of products or equipment or a company that purchases such products and equipment manufactured in accordance with company specifications.
mass floor: see floor .
mass wall: see wall.
mean temperature: one-half the sum of the minimum daily temperature and maximum daily temperature.
20 ANSI/ASHRAE/IES Standard 90.1-2022 (I-P)