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Last seen: Nov 3, 2025
Oh, 260m2 house
In short, Radiators - although the upstairs ones basically never come on as it never gets cold up there Buffer tank 20l and 210l unvented cylinde...
@heacol the house is pretty well insulated. Our losses are around 30w/m2 with an EPC score of 93. So no idea which mode is best. I don't think we have...
@heacol the weather compensation is directly on the heat pump which is connected to the Nest so it preadjusts the water temperature before the thermos...
@heacol the table had a min, mean and max COP. I took the mean as my number. It will be interesting to see the outcome, especially as the system has w...
@derek-m yes that's true, but there is a pretty big difference between wholesale costs to generators and retail costs to residential heating - my poin...
I got these figures from Midea for the 12kw unit Water Temp COP 30 35 40 45 50 55 Outdoor air temp -25 2.29 ...
@derek-m if gas remains the cheapest method of heating, no one will switch. That's just straight fact. Gas heating has to be made more expensive in co...
@derek-m the only way to out gas will be to make it expensive. Move the industry costs for carbon off electricity and onto gas. From my understanding ...
@derek-m little more complex than that. Most batteries have a "peak charge" power - mine is 3.2kw, tesla is a little higher at 5kw. This essentially c...
@stevebrockie3 do the insulation first then you'll need a smaller ASHP. Our house is 260m2 and we only have a 12kw unit. Plus it'll allow you to use l...
@info how would you store that heat in a battery? You would need a buffer tank of some kind. I know it's possible, but it would need a tank and heat e...
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Degrees of Separation
Latest Posts
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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 , 1 hour 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 , 21 hours 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
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RE: Is the "divide by 2900" rule still valid?
Really flow rate is a pipework limitation not a water p...
By JamesPa , 6 days ago
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