Split-System Heat Pump Water Heater With Refrigerant
For a while I have considered the Sanden CO2 Heat pump as the bees knees as far as heat pump water heaters are concerned.
I recently realized that the water connections go outside, which makes the safety of the system reliant on heat trace during periods when the outdoor air temp is below freezing.
This further gives a reliance on having electric power for the system to not have a potential for catastrophic failure.
These are non-starters in a cold climate.
The tank only options are nice, with the only drawback being that they cool the conditioned space.
Another alternative I have found is this one: https://www.theradiantstoreinc.com/solar-assisted-heat-pumps
Which apparently qualifies for the solar thermal federal tax credit, and has an added coil so you can integrate it as a preheat for a ASHP for space heating.
Are there other options for a split system for DHW that use refrigerant as the exchange medium between the units?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part