Last seen: Oct 11, 2025
@alfapat some installers try and set up the heat pump to run like a conventional boiler with TRVs. It’s an incredibly expensive way of doing it but ea...
Yes thats right, although I dont totally use all my battery capacity and its closer to 4.5 kWh charging rather than 5kWh per night I think what Im s...
@alfapat Hi Pat, sorry Ive been away for a few days so havent had a chance to catch up. Im not sure you are doing the radiator valves correctly. The...
@alfapat I will be interested to see how the flow and return from the buffer compares with that of the heat pump.
@alfapat It is larger than it looks at 200+ m2 but didn’t you say that was the old EPC before the insulation improvements? Im just struggling to se...
@goody I couldn’t agree more! I just meant they usually get it wrong in the opposite direction and leave a grossly oversized heat pump 😁
@alfapat No it wasn’t attached to the email. Can you resend it please.
@alfapat Im even more confused now as looking at the house I wouldnt have guessed more than 8kW would be needed. Thats not an exact science I know but...
@alfapat The lockshield valve is the one opposite the TRV. Heat pumps dont play well with TRVs and they are not necessary when using water law. Just s...
@alfapat So the EPC pretty much matches the heat calculation. By all means tweak and see it that helps. If it doesnt then try to look at any upgrade...
@cathoderay I think you should qualify this with Air to Water heat pumps. Air to Air are quite capable of rapid heating for short periods of time in a...
@goody Its unusual for a heat pump to be undersized under the MCS protocols, its usually vastly the opposite. Cant you just swap it out for a bigger o...
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