My friend Richard installed a heatpump aircon in his garden office, and has included some notes on use for heating at various times of the year at the end of the writeup:
FWIW, I had a very poor experience with that particular supplier... but that was a long time ago, so they may have improved since.
Very thorough installation description and very similar to my requirement. Interesting that the temperature control is not more precise.
Ta.
Yes, I'm not suggesting that supplier specifically, merely that they're good at actually quoting prices, rather than 'ooh, ahh, well, it depends'. While the units are 'easy install' you're supposed to have an F-gas ticket to do it, so it's not a DIY job anyway. (But you could run all the electrics and pipework and just have a 'fridge technician do the pressure test and connection. Much like you might farm out the gas bit of a heating install)
PS Don't ask for a connection in the middle of summer, when suddenly everyone wants aircon :-)
Theo
And also able to get spectacularly hot when it is in the sun which is what affects my well insulated main garage doors. Paint films don't get on with being baked (too hot to touch) in summer and frozen in winter.
There certainly were (and probably still is) places you can hire the vacuum pump kit to make a full self install doable if you have access to the refrigerants.
The 'easy install' ones come pre-gassed with enough refridgerant for something like 5m of pipe. But it isn't legal to install them without an F-gas ticket, presumably because there's no guarantee that a random DIYer is going to make a vacuum tight pipe and evacuate it correctly.
Theo
DIYer is
Many of the pre-gassed ones have push fit couplings that make it pretty much impossible to make a bad connection. There is also no purging down etc.
Still being only lowly DIYes I am sure none of us would attempt to avoid paying for the professional to come and do it for us. (Much the same as we would not dream of re-wiring our own house, installing GSH, or fitting a hot water cylinder!)
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