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I've had a bit of a look, yes.
I'm half considering one to replace my aging boiler but as I understand it the lower operating temperature means my house will be permanently freezing without major alterations elsewhere. I'm also a bit unsure of the performance in very cold spells. All a bit of a shame as I like the idea.
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It works and keeps the temp more at a constant temp but means you need to have blending values Probs underfloor heating or giant radiators to keep the temp at a decent range.
Gimme a boiler over that shite, they are pushing this trying for folk to get bought on but I’ll certainly not be getting one anytime soon.
You seen the price of them, you could do your full heating and still be a cheaper than buying air source.