[EVO X]

I live in Canada and we use a Mitsubishi Zuba heat pump and its excellent and good down to-30c.

Just curious. How deep is the HP piping in your yard?

[Gaffer]

Indeed. That’s the only way that thing would work down to -30C. There has to be some kind of heat to pump out that is usable (and recoverable) in the first place. The higher thermal ballast of deep earth is the only way, IMO.

[Antioch]

There are no pipes. It’s an air source heat pump-it will extract heat out of winter air