Don heat pumps require defrost cycles in the winter that increase my utility bills?
All conventional air-source heat pumps require some method of energy consuming defrost cycle or de-frost means. A de-frost cycle is generally a polite way of telling you that your heat pump is being operated in the cooling (air-conditioning) mode in the winter so as to send hot refrigerant vapor into the exterior air-source heat exchange tubing to melt the ice build-up from frozen air moisture condensation, all while the heat your system is removing from your home is being replaced by expensive electric resistance or fossil fuel heat (this is typically one of the reasons your heating bills are very high when it is very cold). Further, operation in the de-frost cycle is typically hard on the system’s compressor, and helps contribute to more frequent service calls and to eventual compressor failure. The ETA system has no defrost cycle. Thus, the above-mentioned problems, typically associated with air-source heat pumps, are non-existent with the ETA design. This translates into lower heat
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