Resources: Air-Source Heat Pumps

Part 8 of Air-Source Heat Pumps. The following are sources of additional information on heat pumps. This list is not exhaustive, nor does the mention of any resource constitute a recommendation or endorsement. Ask an Energy Expert DOE’s Energy Efficiency and Renewable Energy Clearinghouse (EREC) P.O. Box 3048 Merrifield, VA 22116 1-800-DOE-EREC (363-3732) Online submittal form. Energy […]

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Maintaining and Servicing

Part 7 of Air-Source Heat Pumps. Heat-pump performance will deteriorate without regular maintenance and service. The difference between the energy consumption of a well-maintained heat pump and a severely neglected one ranges from 10 to 25 percent. Regular Maintenance Either the homeowner or service technician can perform the following routine maintenance tasks: Clean or replace […]

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Operating a heat pump

Part 6 of Air-Source Heat Pumps. Like combustion heating systems, you control heat pumps using thermostats. If you leave and return at regular times everyday, you’ll save money by using automatic thermostats, which minimize energy use during the times the home is unoccupied. However, choosing an automatic thermostat’s reactivation time requires considering the duration of […]

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Improving Performance

Part 5 of Air-Source Heat Pumps. Poor installation, duct losses, and inadequate maintenance are more of a problem for heat pumps than for combustion furnaces. A growing body of evidence suggests that most heat pumps have significant installation or service problems that reduce performance and efficiency. According to a report on research funded by Energy […]

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Installing a New Heat Pump

Part 4 of Air-Source Heat Pumps. A heat pump’s performance and energy efficiency not only depend on the selection and planning of the equipment but also on careful installation. Consumers and home builders alike tend to accept the lowest bid for heating and air-conditioning work. This unfortunate choice can often leave a system lacking 10 […]

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Selecting a Heat Pump

Part 3 of Air-Source Heat Pumps. When selecting an air-source heat pump, consider the following three characteristics carefully: the energy efficiency rating, sizing, and the system’s components. Energy efficiency rating In the United States, we rate a heat pump’s energy efficiency by how many British thermal units (Btu) of heat it moves for each watt-hour […]

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Types of Air-Source Heat Pumps

Part 2 of Air-Source Heat Pumps. A split-system heat pump heating cycle You can use a central heat pump to heat and cool a whole house. Most central heat pumps are split-systems—that is, they each have one coil indoors and one outdoors (see Fig. 1 below). Supply and return ducts connect to a central fan, […]

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Air-Source Heat Pumps

Part 1 of Air-Source Heat Pumps. There are two common types of heat pumps: air-source heat pumps and geothermal heat pumps (GHPs). Either one can keep your home warm in the winter and cool in the summer. An air-source heat pump pulls its heat indoors from the outdoor air in the winter and from the […]

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