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alistairgbarron
@alistairgbarron
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Joined: Dec 3, 2022
Last seen: Dec 18, 2022
Profile Activity
Topics: 1 / Replies: 24
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Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

Well we had the contractor visit on Friday to do their heat loss and radiator calcs. They use a piece of software that is way more complicated than pl...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@transparent I have 2 installers I am considering both not so far away from me, they are both experienced, competent and well spoken for. However prob...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@cathoderay well done - good to know the provenance of things like that - and simple suits me fine 🤣

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

I spoke with them a couple of years ago and quickly realised that they were still selling double glazing. However they are "popular" and spend a lot o...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@cathoderay oops - yes I was using 0.304 and now I realise that he is multiplying up by 3.35 so does get back to close to the ∆50 output. Fortunatel...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

My spreadsheet with 21C and a water temperature of 45C gives a DeltaT24 and with 40C a DeltaT19. This morning my favoured contractor came back at me...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@derek-m Likewise a single measurement point does not work at all well in a multi room house either. Place it in the centre and the periphery will hav...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@transparent I am hoping we can find a reliable pressure sensing pump although the system already has the bypass. The Bosch EC adapter basically tak...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@cathoderay I don't envey your difficulties, ours are nothing like that. Although it amazes me the difficulty of retrofitting to a modern property. Th...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@transparent as I understand it (and I have yet to see it) the Daikin HP deals with the temperature of the buffer tank keeping that to the exchange te...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@derek-m yes & thx. Now I have my spread sheet of radiators calculating output of existing while I vary Delta T. At 45C I have 134% of heat lo...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@transparent I expect to run the system continuously with a slightly lower night time than day. However not with a single temp thermostat for the whol...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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