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Last seen: Nov 3, 2025
@rv3 Its just your heat loss per m2 of the outside of the building e.g. what is the replacement number. You can then multiply this by the size of your...
Your w/m2 losses is shocking. As a comparison our renovated house has a loss of 34 w/m2 and our house is actually bigger at 261m2 I would advise you...
@derek-m it's down at 50° for theb moment. Let's see what the wife says...
@kev-m I think everyone has zero idea of how efficient their boiler actually is - I didn't even think about it. My assumption, like anyone, would be t...
I totally forgot the boiler had the feature. I was told when it was put in that it should be 90% efficient. But I can just tap a button to see. To be ...
Hi all, I just checked my current boiler (Ideal Vogue Max 32kW) and I checked the efficiency level which is an option in the menu. Its down at 58%! ...
I track my system month my month and then break it down into an annual sheet (attached). When I installed my PV I opted for a hybrid invertor (Sofar M...
I cannot see how it would hurt. I am surprised an installed recommended that space given how tight it is. Ours discounted the side of our house for th...
In my view (I have 7kwh of batteries and solar PV) batteries are totally worth it. Mine provided 31% of my supply last year and "paid back" £233 of th...
@sam pretty sure I've been told that ASHP's need a lot of space to ensure they get a good flow of air around them. If its intaking air at 10 degrees y...
I already have a PV to immersion diverter, however with an ASHP this isn't really worth it. the ASHP will be much more efficient. On the battery the...
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Degrees of Separation
Latest Posts
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Switch suitable to change between two inverter CT's
My setup has the Heat pump and EV wallbox seperated fro...
By Jancold , 3 hours ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@batpred They offered both, I went with Pro. As an amat...
By baroquebank , 9 hours ago
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RE: To re-pipe or not to re-pipe? Moving from oil boiler to air source heat pump.
@penval, really useful update. After all the discussion...
By Mars , 1 day ago
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RE: Who's your electricity provider and what's your tariff?
@papahuhu I prefer to look at it simplistically. We d...
By Old_Scientist , 2 days ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
D'oh - of course. I shouldn't post before my brain is f...
By Old_Scientist , 2 days ago
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RE: Questions about A2A for heating as well as cooling
@rob-of-york I would concur with the underfloor insulat...
By Toodles , 2 days ago
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RE: New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless
Nothing attached! I have rads but UFH makes the case ...
By JamesPa , 2 days ago
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RE: Cooling with air to water heat pumps
Passive cooling should always be the first call. Keep ...
By JamesPa , 2 days ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
@rob-of-york Thank you, I’m thinking along these same l...
By Toodles , 3 days ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 3 days ago
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?
@dave, I think @jamespa has probably identified the mos...
By Mars , 4 days ago
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RE: Plug and play solar. Thoughts?
My thought is simple. Bring it on and bring on plug in...
By JamesPa , 4 days ago
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RE: Heat Geek mini store vs pump size
Yes I agree, that’s why Heat Geek have most likely sele...
By Tomtheheatingengineer , 5 days ago
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@tomtheheatingengineer, thank you, and welcome to the f...
By Mars , 5 days ago


