The Basics - Heat Pumps

What is Heat Pump

Heat pump is device that move heat from one place to another. Heat pump uses a small amount of energy and is typically used to pull heat out of the air or ground to heat a home or office building, but they can be reversed to cool a building. During the heating season, heat pumps move heat from the cool outdoors into your warm house and during the cooling season, heat pumps move heat from your cool house into the warm outdoors.

Types of Heat Pumps

There are three types of heat pumps: air-to-air, water source, and geothermal. They collect heat from the air, water, or ground outside your home and concentrate it for use inside.
The most common type of heat pump is the air-source heat pump, which transfers heat between your house and the outside air. Today’s heat pump can reduce your electricity use for heating by approximately 50% compared to electric resistance heating such as furnaces and baseboard heaters.
Geothermal (ground-source or water-source) heat pumps achieve higher efficiencies by transferring heat between your house and the ground or a nearby water source. Although they cost more to install, geothermal heat pumps have low operating costs because they take advantage of relatively constant ground or water temperatures.

How Heat Pumps Work

Heat pumps work the same way a refrigerator does–by having a gas condense to liquid and then expand again, within a loop of rigid tubing that extends from the hot side to the cold side. This moves heat because of the ideal gas law, which says that as pressure increases, temperature increases; as pressure decreases, temperature decreases.

Heating, cooling, and dehumidifying, heat pumps have it all.

Learn more about Heat pumps:
The Basics
Improving Performance
Installing a New Heat Pump
Maintaining and Servicing
Operating a Heat Pump
Selecting a Heat Pump

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