As the heat is transferred into the home, the gasoline falls in temperature, triggering it to return to your liquid condition. With a world warming prospective of only 3, it is a whole lot better than R32 but it really does have a single issue. R290 is propane and, therefore, https://high-temperature-heat-pum67889.blazingblog.com/31014506/the-2-minute-rule-for-heat-pumps