Water Source Heat Pump

Carrier Aquazone Water Source Heat Pumps (WSHP) are a great solution for year-round multi-zone heating and cooling. Our wide range of WSHP models deliver efficient, reliable temperature and humidity control for a variety of applications. Utilizing the earth’s natural resources along with our engineered operating flexibility, Aquazone heat pumps deliver Energy Efficiency Ratios (EER) up to 31.5. Carrier WSHPs let you put heating and cooling capacity exactly where and when you need it. Aquazone units are available in numerous sizes and configurations with several standard and factory-installed options allowing you to configure systems for today as well as for expansion in the future.

How it works

WSHP systems are designed to take advantage of the fact that the earth’s resources (ground or water) remain at a relatively constant temperature at a certain depth. Instead of using a conventional heat source, the ground water can be used as the heat sink for absorption or rejection of heat. Geothermal Earth Loops come in several different configurations depending on space availability and soil properties. Geothermal heat pumps can work with closed or open loops. Open loops work best with well, river, or lake water applications. Closed loops can be installed in vertical or horizontal ground configurations, or submerged in a pond or lake.


Carrier Aquazone heat pumps are designed to reduce utility costs, especially under part-load conditions and over a lifetime of operation. Puron refrigerant two-stage models offer Energy Efficiency Ratios (EERs) up to 18.5 in boiler/tower applications.

High-efficient heat pumps in a geothermal application, where they simply move heat within the earth that already exists can achieve EERs up to 31.5 along with 3.5 to 5 units of energy for every unit used to power the heat pump system.


Built with heavy-gage, galvanized steel sheet metal cabinets and featuring a corrosion-resistant, powder-painted finish, Carrier Aquazone WSHPs are durable and long lasting. All water and air coils, plus drain pans are available with coating options to protect against corrosion and airborne chemicals, plus state-of-the-art compressor technology yields the highest efficiency and reliability. Team these components with solid-state digital controls and eight standard safeties plus a standard five-year warranty on most units for added peace of mind.

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