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A method of heating consisting of system with pipes placed in the floor, wall, or ceiling. Also a method of heating with electrically heated panels.
A colorless, odorless, radioactive gas that comes from the natural breakdown of uranium in soil, rock and water.
A temperature control device, typically found on a wall inside that consists of a series of sensors and relays that monitor and control the function of a heating and cooling system.
A substance that produces a refrigerating effect while expanding or vaporizing.
Combination grille and damper assembly covering an air opening or end of an air duct.
The ratio of the amount of vapor contained in the air. Normally expressed as a percentage.
Air drawn into a heating or cooling unit after having been circulated from the heater or cooler's output supply to a room.
A central air conditioner consisting of two or more major components. This is the most common type of system installed in a home.
The unit of measure used in air conditioning to describe the cooling capacity of a system.
A furnace that pulls return air in from the bottom and expels warm air from the top.
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