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Geothermal and Water-Source Heat Pumps


Resources

Staff Contact: Rupert Alfiler



Direct Geoexchange Heat Pumps
Direct Geoexchange Heat Pumps may consist of one or more factory made assemblies normally include an indoor conditioning coil with air moving means, compressor(s) and refrigerant-to-earth heat exchanger(s), including means to provide a heating function or a cooling function or both. It is defined as a continuous sealed underground closed loop heat exchanger with one refrigerant supply tube and one refrigerant return tube. Where such equipment is provided in more than one assembly, the separate assemblies are to be designed to be used together and the requirements of rating outlined in the standard are based upon the use of matched assemblies.

This program applies to all factory made residential, commercial and industrial production models of Direct Geoexchange Heat Pumps, rated up to 100,000 Btu/h at AHRI Standard Rating Conditions (Cooling). A “production model” is a model for which a manufacturer regularly publishes data, catalogs,


Water-Source Heat Pumps
Water-source Heat Pumps may consist of one or more factory-made assemblies that include indoor space conditioning and/or domestic water heating heat exchanger(s), compressor(s), and a liquid-side heat exchanger. When provided in more than one assembly, the separate assemblies are designed to be used together. Water-source Heat Pumps may provide space heating, space cooling, domestic water heating, or a combination of these functions and may also include the functions of liquid circulation, thermal storage, air circulation, air cleaning, dehumidifying or humidifying. There are two classes of water-source Heat Pumps.

Water-to-air Heat Pumps
Water-to-air Heat Pumps provide space conditioning primarily by the use of an indoor air heat exchange coil. Water-to-air models may also provide domestic water heating and hydronic space heating by using desuperheater and/or demand water heating functions.

Water-to-water Heat Pumps
Water-to-water Heat Pumps provide space conditioning and/or domestic water heating by the use of indoor refrigerant-to-water heat exchanger(s). Water-to-water models may provide domestic water heating by using desuperheater and/or demand water heating functions.

This program applies to all production models of water-source Heat Pumps rated below 39,500 W [135,000 Btu/h] at ISO Standard Rating Conditions (Cooling), manufactured for sale in North America and as covered by the Standard, shall be included for those participating in the certification program. Each consists of one or more factory-made assemblies, which may include an indoor conditioning coil with air moving means, compressor(s), and refrigerant-to-water heat exchanger(s), including means to provide both cooling and heating, cooling only, or heating only functions. When such equipment is provided in more than one assembly, the separate assemblies shall be designed for use together, as the requirements of rating outlined in the Standard are based upon the use of matched assemblies.