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Viewing results 0 - 10 of 102 matches for "O" Back   |   Next
O&M designer
designer specializing in the operations and maintenance aspects of the project.
object plane resolution
size in the object plane which corresponds to the products of the system’s instantaneous field of view in radians and the distance from the system to the object.
occupant sensor
a device that detects the presence or absence of people within an area and that causes lighting, equipment, or appliances to be regulated accordingly.
occupant-controlled naturally conditioned spaces
those spaces where the thermal conditions of the space are regulated primarily by the opening and closing of windows by the occupants.
occupiable space
(1) any enclosed space inside the pressure boundary (including, but not limited to, all habitable spaces, toilets, closets, halls, storage and utility areas, and laundry areas) and intended for human activities. (2) that portion of the premises accessible to or occupied by people, excluding machinery rooms.
occupied zone
the portion of the space that is normally occupied. The occupied zone is typically defined as encompassing all space from the floor level, excluding the space from the floor to 0.25 ft (0.076 m) above the floor, to 6 ft (1.83 m) above the floor and excluding the space from the wall to 2 ft (0.61 m) away from any wall.
octave band
a frequency band with an upper frequency limit twice that of its lower frequency limit. Octave and one-third octave bands are identified by their center frequencies, which are the geometric means of the upper and lower band limits. Three one-third octave bands make up one octave band. Octave 1- Center 63 HZ, Low 50 Hz, Upper 80 Hz; 2-100/125/160, 3- 200/250/315, 4-400/500/630, 5-800/1000/1250, 6-1600, 2000, 2500, 7-4000/5000/6300, 8-6300/8000/10000
OD
(1) outside diameter. (2) outside dimension.
ODB
see outdoor dry-bulb temperature.
odor
a quality of gases, liquids, or particles that stimulates the olfactory organ.
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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.