dual-fuel system
A heating system in which the boiler can burn either of two fuels, usually oil and gas in the US; […]
Glossary
Glossary
dual-flush water closet
A water closet providing a choice of two flushing mechanisms. One button makes a full flush available; the other uses
Glossary
dual-fiber cable
Optical fiber cable composed of two single-fiber cables enclosed in an extruded plastic overjacket; may have a rip cord for
Glossary
dual-element fuse
A fuse which has currentresponsive elements of two different fusing characteristics in series.
Glossary
dual-duct system
An air-conditioning system in which two supply ducts run to each space being conditioned, one for cold air, the other