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Split heat pump water heaters (HPWH), where the water tank is separated from the compressor, are having a moment. After a decade of just having one model in the US, we have two new technologies that entered the market in the last year and a prize that will announce the winner of a competition to make a low-cost, low-profile split HPWH next month.
A split HPWH is where the compressor is located outdoors and the tank is located indoors. Think: ductless heat pump for hot water.
Let’s take a look at why split HPWHs are an important form factor, what buildings they might work in, and what all has been happening.
The HPWH size issue
