African ebony
See ebony.
Glossary
Glossary
afterfilter, final filter
In an air-conditioning system, a high-efficiency filter located near a terminal unit.
Glossary
after-flush
The residue of water in a toilet flush tank after it has been flushed; after flushing, the residue gradually drains
Glossary
aerodynamic noise
Noise resulting from the flow of air; often generated in an airconditioning system when an airstream encounters protuberances, rough surfaces,
Glossary
aerofilter
A bed of coarse material used for the rapid filtering of sewage; recirculation of the effluent may be employed.