Fun fact: my brother lives a stone's throw from Dale Vince's house in the Cotswolds, and his 500-year-old iron forge gets an excellent coefficient of performance from this Mitsubishi heat pump.

A 500-year-old forge is unlikely to be well insulated. It's remarkable that a heat exchanger would have enough power to overcome that. How is the coefficient of performance measured?

Is that air to air?

*misinformation from Dave Vetter here, my brother informs me the house is only 300 years old.

Isn't Vince the octopus guy? I thought they were pushing their own ASHP?

Brilliant! @janrosenow.bsky.social@annieleymarie.bsky.social@nickhedley.bsky.social