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Viewing results 0 - 10 of 155 matches for "H" Back   |   Next
habitable space
building space intended for continual human occupancy; such space generally includes areas used for living, sleeping, dining, and cooking but does not generally include bathrooms, toilets, hallways, storage areas, closets, or utility rooms.
halide torch
device to detect gas leaks using the color changes of a flame in the presence of a halogenated hydrocarbon.
halocarbon
a hydrocarbon derivative containing one or more of the halogens bromine, chlorine, or fluorine; hydrogen also may be present.
halogen
one of the electronegative elements of Group VIIA or Group 17 of the periodic table of the elements (the group also includes fluorine, chlorine, bromine, iodine, and astatine.)
halogenated chlorofluorocarbon
fully halogenated chlorofluorocarbon is one in which all of the hydrogen atoms are replaced by chlorine and fluorine atoms. Atmospheric lifetimes of fully halogenated chlorofluorocarbons are long (75 years for CFC 11 and 111 years for CFC 12).
hand valve
valve that is operated manually by a handwheel attached to the spindle.
hand-washing station
an area that provides a sink with hot- and cold-water supply and a faucet that facilitates easy on/off/mixing capabilities. The station also provides cleansing agents and means for drying hands.
harmonic
a sinusoid whose frequency is an integral multiple of the fundamental frequency.
harmonic order
integer that defines the numerical value of the multiple of the fundamental frequency.
Hartford loop
condensate return arrangement for low-pressure steam heating systems, featuring a constant waterline in the boiler.
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About ASHRAE Terminology

ASHRAE Terminology, a free resource, is a comprehensive online glossary of more than 3700 terms and definitions related to the built environment, with a focus on heating, ventilating, and air conditioning (HVAC), as well as refrigeration, building envelope, electrical, lighting, water and energy use, and measurement terms.

This searchable glossary was designed for use by engineering professionals but is also useful for architects, building owners and operators, educators, public officials, and homeowners.

The terms in ASHRAE Terminology have been assembled and defined and are updated on an ongoing basis by ASHRAE Technical Committee (TC) 1.6, Terminology. TC 1.6 is concerned with terminology, nomenclature, definitions, abbreviations, symbols, and the International System (SI) and Inch-Pound (I-P) units used in the fields of heating, ventilating, air conditioning, water heating, and refrigeration.

To request a free electronic file of the complete list of terms and definitions, email ashraetermseditor@ashrae.org.