(4) Use low temperature radiators with the air to water system
This is a common installation for smaller new builds or existing builds like yours.
The main thing to consider before switching to A2W or A2A is that your overall air tightness is good meaning you can actually use either system
Thanks for the feedback!I have an air to water heat pump, with old rads and it works great. Cost less to run than gas.
I do have a good level of insulation in the walls and roof. But I did not need to have the house air tight, which I see a lot of commentators on AAM say that you do.
The actual important thing to do, is a proper heat loss calculation so that you can correctly size you heat pump and your radiators.
For what it’s worth, I got my 1974 house upgraded via a one stop shop this year. Ditched gas for heat pump and got house replumbed as part of that work. Also got external insulation added with new triple glazed windows. We couldn’t (practically) do underfloor heating so had to go with bigger rads downstairs, upstairs remained pretty much similar size to originals. Could have done with the extra wall space but frankly being warm is a bigger gain as our house was freezing. I agree with other poster that a well designed heating system is key. Our house had the advantage that its is small so this probably helped with running costs. We went from E2 to A2. System only went in at end of Feb so haven’t put it through a full winter in terms of costs. But March was pretty cold and the running costs were far less than I was paying for gas. Overall, the cost worked out well because of the grants. I found quoted prices varied greatly from one company to another too.
Most of the work was external so didn’t really bother us, the heat pump installation part was trickier because of the replumbing. The company doing it were happy to work around us and said they had done this before. But we thought the cat might get in the way so we opted to move to a friends for three days. I talked to another lady on my estate who also got her house replumbed (for gas) and she said she managed fine without moving. I would talk to some companies and see what they say. The big reason I went with one stop shop was that you got a lot more grants. And the company I went with didn’t ask us to pay for the entire amount, only the cost after the grant. So that really helped with costs too. Hope that helps, I was very wary of all this before work began but am delighted I did now. I found the pre work technical assessment useful too.Hi,
Thanks so much for providing your feedback!
Always good to see how others tackled it with similar circumstances.
Sounds like you got a deep retrofit via the one stop shop which usually involves moving out for a while?
I'm trying to avoid that if possible so leaning towards spreading out the upgrades and doing them one at a time.
Most of the work was external so didn’t really bother us, the heat pump installation part was trickier because of the replumbing. The company doing it were happy to work around us and said they had done this before. But we thought the cat might get in the way so we opted to move to a friends for three days. I talked to another lady on my estate who also got her house replumbed (for gas) and she said she managed fine without moving. I would talk to some companies and see what they say. The big reason I went with one stop shop was that you got a lot more grants. And the company I went with didn’t ask us to pay for the entire amount, only the cost after the grant. So that really helped with costs too. Hope that helps, I was very wary of all this before work began but am delighted I did now. I found the pre work technical assessment useful too.
We prefer recommendations be made in public so that others might also benefit.Would you mind pming me the one stop shop you used so I can check if I can get a quote for my location?
Okay my bad.We prefer recommendations be made in public so that others might also benefit.
The company doing it were happy to work around us and said they had done this before
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