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  2. ASHRAE 90.1 - Wikipedia

    en.wikipedia.org/wiki/ASHRAE_90.1

    ANSI/ASHRAE/IES Standard 90.1: Energy Standard for Buildings Except Low-Rise Residential Buildings is an American National Standards Institute (ANSI) standard published by ASHRAE and jointly sponsored by the Illuminating Engineering Society (IES) that provides minimum requirements for energy efficient designs for buildings except for low-rise residential buildings (i.e. single-family homes ...

  3. Air changes per hour - Wikipedia

    en.wikipedia.org/wiki/Air_changes_per_hour

    Q = Volumetric flow rate of air in cubic feet per minute (cfm) Vol = Space volume L × W × H, in cubic feet; In metric units = where: ACPH = number of air changes per hour; higher values correspond to more ventilation; Q = Volumetric flow rate of air in liters per second (L/s)

  4. Template:Convert/list of units/area - Wikipedia

    en.wikipedia.org/wiki/Template:Convert/list_of...

    default conversion combinations SI: square kilometre: km2 Q712226: km 2: US spelling: square kilometer: 1.0 km 2 (0.39 sq mi) km2 sqmi; square hectometre: hm2 Q35852: hm 2: US spelling: square hectometer: 1.0 hm 2 (2.5 acres) square decametre: dam2 Q23931040: dam 2: US spelling: square dekameter: 1.0 dam 2 (1,100 sq ft) square metre: m2 Q25343 ...

  5. Public Land Survey System - Wikipedia

    en.wikipedia.org/wiki/Public_Land_Survey_System

    Many local zoning laws are defined in feet/square feet. Conversion of units for surveyors are not simple, and complex decisions are frequently required (such as non-universal conversion factors, soft/hard conversions, number rounding). Example of road system in a PLSS area; Nebraska Example of road system in a non-PLSS area; North Carolina

  6. Acre - Wikipedia

    en.wikipedia.org/wiki/Acre

    One acre equals 1 ⁄ 640 (0.0015625) square mile, 4,840 square yards, 43,560 square feet, [2] or about 4,047 square metres (0.4047 hectares) (see below).While all modern variants of the acre contain 4,840 square yards, there are alternative definitions of a yard, so the exact size of an acre depends upon the particular yard on which it is based.

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  8. Infiltration (HVAC) - Wikipedia

    en.wikipedia.org/wiki/Infiltration_(HVAC)

    The infiltration rate is the volumetric flow rate of outside air into a building, typically in cubic feet per minute (CFM) or liters per second (LPS). The air exchange rate, (I), is the number of interior volume air changes that occur per hour, and has units of 1/h.

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