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Last seen: Nov 3, 2025
@derek-m we already have 200mm of rockwool between the floors. It's more just an issue that the top of the house is super insulated so hangs onto heat...
@derek-m thanks for that - as an FYI our heat loss is 8774w and our emitters are 12,115w in power From this, on the coldest day of winter we would u...
@derek-m below is the 90th percentile coldest day where I live. Its very mild here as we are on the coast and I imagine this would have a big effect o...
@derek-m I do have a calculated heat loss with room by room radiators - would this be useful in your scenario? Our primary living is in one room (12m ...
@derek-m looks like it works. As an FYI you can use the formula FORECAST in Excel to estimate a data point from available data e.g. off number tempera...
As an FYI this is the temperature range where I live - as you can see we are mild pretty much the whole year, with the odd cold day. The coldest point...
@derek-m there is definitely some kind of issue with the file - wont open for me either
@derek-m that's amazing. Thank you! As an FYI I already copied most of that COP and temperature data into Excel, if that helps?
I've just found a whole section on heat pumps for Nest thermostats - quite interesting!
@morgan
@derek-m I've emailed the guy who installed the system to ask
@derek-m I would assume it controls both, as there is little point running the ASHP and not the central heating pump and vice versa. The Nest will cal...
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Degrees of Separation
Latest Posts
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
Not a problem; that’s why I left it as it was. The pers...
By Majordennisbloodnok , 10 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 , 19 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 , 3 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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