Seasonal Energy Efficiency Ratio. A measure of seasonal or annual efficiency of a central air conditioner or air conditioning heat pump. It takes into account the variations in temperature that can occur within a season and is the average number of BTU (British thermal units) of cooling delivered for every watt-hour of electricity used by […]
A chemical substance that produces a refrigerating effect while expanding and vaporizing.
A compressor that uses pistons driven by a crankshaft to deliver gases at high pressure.
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Polyvinyl chloride; a type of plastic. In recent years, PVC has been replacing traditional building materials such as wood, concrete and clay in many areas.
A heating and cooling system contained in one outdoor cabinet. This package unit is typically installed on the roof, beside, or sometimes in the attic of a home.
