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A water-source heat pump in a condo works much like a traditional air-source heat pump, except that it extracts and dissipates heat by way of building a water loop rather than air. Water-source heat pumps cut operational costs by only conditioning occupied areas of the building, and recovering heat from interior zones and transferring it to the perimeter of the building.
Modern water-to-water heat pumps utilize a water-cooled condenser, eliminating the blower and ducted air delivery system of water-to-air heat pumps. Significantly less electrical power is required to operate the delivery system as well. These systems are extremely efficient, reliable, and can be applied in ways that are not feasible with systems that depend on air to carry heat to or from the heat pump.
In the heating mode, hot refrigerant flows through the air coil. The heat pump supplies warm air to the conditioned space. The heat added to the room air is removed from the water flowing through the coil, plus rejected compressor heat.
In the cooling mode, cold refrigerant flows through the air coil. The heat pump supplies cool air to the conditioned space. The heat removed from the room air is transferred to the water flowing through the water coil.
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