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Last seen: Apr 21, 2026
@jamespa Thanks again for the great comparison. Yes, I certainly was not considering the 9kW one! And I did notice they had the units wrong on there (...
... the property was built in aprox 2020, about 170 sq M, ground floor plus two above, the top floor being essentially a pre-converted loft room, but ...
Wow, thanks for that @jamespa! I actually did 15.0 degrees for the degree day output, so can adjust slightly. I have a feeling that a calculated he...
Thanks @jamespa for showing the variability. Unfortunately for me taking a gas meter reading involves a trip outside the house! I did gather data over...
@editor Good work Mars!
Mythic Beasts are great!
Thanks @jamespa and @toodles. This company has done work for me before so I am pretty comfortable with them.
Ok... I did another one, still not using the DegreeDays concept, but using another snapshot. From 11:55pm on March 3rd to 8:55am on March 4th I used 2...
but an AI gives me a slightly different value (maybe due to Calor rounding that L x 7.1 figure): To calculate the kWh from 2.39 cubic meters...
Hi @bobtskutter ! Thanks for your reply -- I'll have to take some time to digest it, some new concepts in there for me. The kWh figure I arrived at th...
according to degreedays.net, that 16th date (at Gatwick observation station) was about 14.3 heating degree days for the 15.5 base temperature. The 21s...
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Latest Posts
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We kept ours and Heat Geek would have been in touch if ...
By Batpred , 2 hours ago
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RE: Who's your electricity provider and what's your tariff?
Hope you are hearing from a good source? Call me old ...
By Batpred , 2 hours ago
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RE: Missing flow temperature in Heat Geek proposal
The Heat geek contract had various get-out clauses with...
By Batpred , 4 hours ago
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RE: Why are ASHP installs so expensive?
It seems a quite comprehensive breakdown. I will try to...
By Batpred , 4 hours ago
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
@ian-s I would encourage you to have a conversation ...
By Rob of York , 10 hours ago
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RE: Is it the house or the equipment?
Thanks @jamespa The last hard to fix draughts in the...
By springswood , 11 hours ago
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RE: Vaillant Arotherm – Using Heating
@l8again Mine is typically using 11w including the i...
By Batpred , 13 hours ago
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RE: Next steps on my ASHP journey: Radiators and Pipework
If you have a flowmeter and two temperature probes, the...
By bobflux , 22 hours ago
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RE: Siting of the external sensor on a heatpump
@jamespa Absolutely. Even if the same mistake was mad...
By Batpred , 1 day ago
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RE: Recommendations in Ely (Cambs) area for Full setup checks on Nibe HP setup for House.
In fairness all heating has cost a lot to run in recent...
By JamesPa , 2 days ago
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RE: Navigating the World of Refrigerants In Heat Pumps: A Guide for Homeowners
Indeed we are invvestigating AC at present and are havi...
By Toodles , 3 days ago
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RE: Daikin ESPAltherma and Home Assistant installation
It's laziness lol The PV system is very chatty, meter...
By bobflux , 4 days ago
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RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
R (The R Project for Statistical Computing, I use it wi...
By cathodeRay , 4 days ago



