snap in fastener
(See fixing accessory for an air terminal device)
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sound attenuating section
[EN 12792-2003, 335]:section in which a sound transferred into ductwork or to ambient is reduced.
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[EN 12792-2003, 336]:element inserted into the air distribution system and intended to reduce the airborne noise in the system,
Continue reading →sound reduction (attenuation)
[EN 12792-2003, 337]:reduction of sound energy
Continue reading →source (in air pollution)
[ASHRAE Standard 62.2]:an indoor object, person, or activity from which indoor air contaminants are released, or a route of entry of contaminants from outdoors or sub-building soil. [ISO 16814:2008, 3.39]:persons, materials or processes (activities) from which indoor air contaminants are … Continue reading →