air space
The space above private property or public property for which air rights may be granted.
Glossary
Glossary
air test, pneumatic test
A test for leaks in drainage systems, in soil, waste, and ventilating pipe systems, or in ductwork; all openings are
Glossary
air reheater
In a heating system, any device used to add heat to the air circulating in the system.
Glossary
air release valve
A valve, usually manually operated, which is used to release air from a water pipe or fitting.