Hitachi launches CO2 heat pump water heaters with solar-friendly tariff controls4tthelastgallon about 4 hours ago 1 commentsRead Article on pv-magazine.com FR version is available. Content is displayed in original English for accuracy.
Discussion (1 Comments)Read Original on HackerNews
* https://en.wikipedia.org/wiki/R-744
It's just not as prevalent in the residential HVAC market (which this product serves?), and more in the commercial/industrial space (probably because of the higher pressures needed to get into a liquid state).