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Last seen: Oct 27, 2026
Great work. Have you subtracted the fixed contribution from the final figure. Remember the loss is what the house loses to the outside world, the h...
I bought it, read it, enjoyed it. Despite my earlier comments I think it should be compulsory reading for everyone in the industry, and everyone who ...
Agree with the first paragraph (I said roughly the same above). Average indoor temp probably about 20-21C but I cant be absolutely sure. The data w...
Because the plot is against degrees days not OAT, with an assumed base of 15.5, this is most likely an indication that my house has a base a bit highe...
@rob-of-york Great data and analysis. Im personally convinced that, intelligently used, this is a sound way to assess heat loss. FWIW h...
Great. You just need to find a way of cranking up your circulator (if necessary) until either the target flow rate is reached or its too noisy, or pl...
There may be a 'max temp for heating' parameter. Alternatively you could extrapolate the curve to a higher OAT point and set the T4H2 parameters acco...
Could be, but of course that will cause the IAT to rise. There again you might, quite possibly do, open the door/windows to compensate. I set my min...
There arent many of these hitachi pumps around here so you may not get an answer. I had a not dissimilar fault with my Vaillant albeit I did get a (...
No it cant, but it could be a (material) fixed or quasi-fixed consumption by the heat pump, or a variable loss elsewhere in the pipework (eg the PHE) ...
Absolutely agree. When I did my heat loss determination I averaged over a day and found that the fit was better, albeit only marginally, if...
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Degrees of Separation
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RE: Tradespeople on Their Phones: What’s Acceptable When They’re Working in Your Home?
Actually, that's a very important point. I've only ev...
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RE: The Changing Jet Stream Could Challenge UK Air Source Heat Pumps
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RE: Aerotherm and weather compensation
These are likely inked. The basic explanation is tha...
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RE: Electrical works for air to air heat pump
agree with above. I have not had extra costs added wh...
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Good to hear that you found a solution. Absolutely a...
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RE: Are there any comparisons of DHW heat stores around?
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RE: How will removing the standing charge on gas bills benefit heat pumps?
The BUS grant funding for 2026/27 will run out at the c...
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RE: Say hello and introduce yourself
@e-a-west as the good Major said, welcome to the forums...
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@editor Hi, To resolve this, please tap on the A...
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