Second, A. O. Smith's Voltex X:
https://cleantechnica.com/2026/08/10/a-o-smith-partners-with-panasonic-to-bring-a-co2-split-hpwh-to-market/
https://www.hotwater.com/products/split-system-outdoor-heat-pump-voltex-x/hpaco-45-100/100397647.html

It's a split heat pump water heater, with the compressor outdoors. It uses #CO2 #refrigerant and therefore has a GWP of exactly 1.

Pros:
* Can use less indoor space, house is small
* Does not cool house in winter
* No need for resistance heat

Cons:
* Uses outdoor space, yard is also small
* More expensive, outdoor unit needs 240v
* Outdoor water lines could freeze

#HeatPumps #WaterHeaters #AOSmith #VoltexX

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