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Home arrow Resources arrow ASHRAE Glossary
Glossary

 

The terms and definitions included in this glossary were taken from "ASHRAE Terminology of Heating, Ventilation, Air Conditioning & Refrigeration".
To access the complete glossary please visit ASHRAE's Bookstore.


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Term Definition
electropneumatic device

one that converts an electric signal to a pneumatic signal.

 

 
ELF

electric load factor

 
EMCS


energy monitoring and control system 

 
EMCS architecture

structure that links hardware units, software packages, sensors, control devices, and other EMCS components into a system dedicated to perform the required control, energy management, and management information functions on HVAC processes in buildings.

 
emf

electromotive force 

 
EMI (electromagnetic interference)

electrical interference generated at radio frequencies inside systems. Compare RFI.

 

 
emissive power (emittance)

ratio of the radiant flux emitted by a body to that emitted by a blackbody at the same temperature and under the same conditions.

 

 
emissivity

radiation property of a material, evaluated with its surface optically smooth and clean, and of sufficient thickness to be opaque 

 
emulsion

relatively stable suspension of small but not colloidal particles of a substance in a liquid with the suspended particles undissolved 

 
endothermic reaction

one in which heat must be supplied to further the reaction. Compare exothermic reaction.

 




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