Cold climate air-to-water heat pumps—Part 2, 2016-07-27

Last month, in the first part of this article we discussed the rationale and emerging market potential of air-to-water heat pumps designed for cold climate applications. We also took a look at the enhanced vapor injection (EVI) refrigeration cycle that allows these heat pumps to operate at sub-0º F temperatures with reasonable performance. This month we’ll look at the technical issues associated with applying these heat pumps. Performance variations The heating capacity and coefficient of performance of any heat pump are strongly dependent on the . . ..

An emerging renewable heat source for North American hydronic systems.

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PDF] Cold Climate Heat Pumps Using Tandem Compressors

Cold climate air-to-water heat pumps—Part 2, 2016-07-27

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PDF) Analysis of air-to-water heat pump in cold climate: comparison between experiment and simulation

PDF] Cold Climate Heat Pumps Using Tandem Compressors

EVI heat pump with DC Inverter. Works down to -15 F (-25 C). This air to water heat source is the most efficient cold weather heat pump on the M

EVI Low Temperature Heat Pump 020A – 29,000 BTU