Archived copies of the article: archive.today ghostarchive.org web.archive.org
The paper the article is about is here and its press release
Archived copies of the article: archive.today ghostarchive.org web.archive.org
The paper the article is about is here and its press release
We hit 0 degrees a month ago and the heat pump was not running. Only the furnace would run when it was that cold. I’ve read that they can work down to 0 though, so I think the installer might have configured it wrong. I’ve been meaning to call them to get that looked into.
From what I read there are ones that work in the negatives mostly around -10 as the limit though.