> Less efficient but still functional means my home was 50 degree inside instead of 67 when it was -1 for two weeks here. No, that's just not functional. "Les

> Less efficient but still functional means my home was 50 degree inside instead of 67 when it was -1 for two weeks here. No, that's just not functional. "Less efficient" means consuming more joules of electricity but still providing the required function. > Heat pumps are great, but they absolutely need some kind of emergency heat back up. They include it. You were sold an inadequate pump for your situation.