duct sealing compound
A resilient substance used to seal the ends of a cable duct or conduit.
Glossary
Glossary
duct lining
A fiberglass blanket material used as a lining inside a sheet-metal duct of an air-conditioning system; reduces noise which is
Glossary
ductility index
The ratio of the total deformation at maximum load to the elastic limit deformation.
Glossary
ductile-iron pipe
A pipe that is fabricated of a cast-iron alloy in which graphite replaces the carbon that is present in cast-iron;
Glossary
duct furnace
A unit heater having a burner and heat exchanger, but not a fan; located in a duct system which is