An Aquatherm heat pump utilizes proven refrigerant technology to capture the heat in the outside air and transfer it to the pool water. Refrigerant is used because of its ability to absorb and transfer heat energy. The fan circulates air through the evaporator coil that acts as a heat collector. The liquid refrigerant in the air coil absorbs the available heat in the ambient air, transforming it into a gas.
The refrigerant gas is then pumped into the compressor. When this warmed gas is compressed, it intensifies or concentrates the heat, like a magnifying glass in the sun. The intensely hot gas is then pumped into the heat exchanger condenser, where the actual heat transfer takes place. As the pool water passes through the heat exchanger, the hot gas gives up its heat to the cooler pool water.
The refrigerant returns to a liquid state and is pumped through the expansion valve then into the evaporator air coil to start the process all over again. The result: a warm pool!