The Engineering Guide to LEED: New Construction: Sustainable Construction for Engineers

Appendix C: Units

The following is a list of abbreviations or notations for units as found throughout this text.

Angstrom (1 10 -10 m)

acre

acre ACH air changes per hour (see App. B)

atm

atmosphere

Btu

British thermal units

cf

cubic feet

cu. ft.

cubic feet

cfm

cubic feet per minute

cfs

cubic feet per second

cm

centimeter

fc

footcandles

fpm

feet per minute ft feet

ft/min

feet per minute

ft 2

square feet

ft 3

cubic feet

ft 3/min

cubic feet per minute

ft 3/s

cubic feet per second

g gram

gal

gallon

gal/min

gallons per minute

gpf

gallons per flush

gpm

gallons per minute

h

hour

in

inch

K

kelvin

kBtu

thousand British thermal units

kW

kilowatt

kWh

kilowatthour

L

liter

lb

pound

lf

lineal foot

m

meter

Met

metabolic rate

mg

milligram

mils

millimeters

mm

millimeter

MMBtu

million British thermal units

mol

mole

Pa

Pascal (1 Pa is approximately 0.004 in of water)

pm

picometer (1 10 -12 m)

ppb

parts per billion (molar-based for gaseous phase; may be volumetric-based for ideal gases. Usually mass-based for aqueous phases, but should be specified)

ppm

parts per million (Molar-based for gaseous phase. May be volumetric-based for ideal gases. Usually mass-based for aqueous phases, but should be specified)

psia

pounds per square inch absolute

s

second

sf

square feet

sq. ft.

square feet

square

100 ft 2 when referring to roofing

ton ac

ton of cooling (an energy unit: 1 ton ac of...

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