Last seen: Feb 11, 2025
What's funny is the heat pump says its only using 21kwh a day but I know our normal use is around 10, so any idea where the remaining 20kwh might be b...
You can do some ballpark maths to see if it is doing OK. E.g. if the outside temperature is -2 over a 24 hour period and your flow temperature was 4...
Cycling might happen if it is controlled by a room thermostat. The heat pump runs hard (and noisily) to get to a high +40 LWT until the room stat stop...
Yes, you would need to reduce the pressure to the correct value for your system (usually 1 to 1.5 bar when cold). And as @jamespa says, disconne...
The heat loss differs depending on the pipe diameter (and flow temperature, presumably). Here are some of the numbers I could find: 15mm 7.89 W/m22m...
Something similar happened to me once with a gas system boiler. The filling loop hadn't been closed properly and it was pushing up the pressure over t...
I guess I'm wrong about the efficiency but the sound power level of the Grant is 65 dB vs 54 dB for the Vaillant and 52 dB for the Logic. More than 10...
I'm far from an expert, @dorkypark, but my understanding is that openings like air bricks are only an issue if within 1m of the bottom of an R290 heat...
Latest Posts
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RE: If a heat pump can only heat DHW to 50C then what? Issue with 18KW Heliotherm heat pump
Hi, No, we're currently in a situation where there is...
By errmm , 2 hours ago
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RE: Say hello and introduce yourself
Welcome to the forums, and it's going to be super inter...
By Mars , 3 hours ago
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@bart No need to apologise, you didn't cause offence, c...
By JamesPa , 4 hours ago
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RE: Kronoterm Versi-i loft sited heat pump installs
@damon, oops, my mistake. Maybe I just saw you commenti...
By Mars , 5 hours ago
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RE: The good, the bad and the not that great – my heat pump installation
And another Fault again this afternoon Joys
By Burtis , 8 hours ago
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RE: Five Years of Renewable Heating Hub
Happy birthday and thank you @editor for everything you...
By JohnnyB , 8 hours ago
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RE: Midea ASHP Issues with Smart Home App losing connectivity with the Wall Unit
OK, that’s clearer. Assuming the wifi is provided by ...
By Majordennisbloodnok , 8 hours ago
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RE: Heat Pump Training vs. Real-World Installation
@majordennisbloodnok That of course, is how it should b...
By Toodles , 9 hours ago
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!
The buzzing is back...
By razz , 9 hours ago
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RE: Help needed to adjust weather compensation on Vaillant air source heat pump
To comment on this I would need to know a lot more abou...
By JamesPa , 10 hours ago
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RE: Optimising LG Therma V R32 using AI
@bontwoody yes, but also be easily reversed! I think ...
By Tim441 , 12 hours ago
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RE: Rate the quality of your heat pump design and installation
I disagree that the technology is too geeky, but its im...
By Majordennisbloodnok , 14 hours ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
In fairness, I would find those temperatures too cold a...
By AndrewJ , 14 hours ago
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RE: ASHP Energy Consumption: Aira 12kW heat pump
Interesting January stats @chandykris and @wally For...
By npru , 14 hours ago
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RE: Help me keep the faith with my air source heat pump installation
Sorting the sensors - get them to swap them round or pu...
By JamesPa , 14 hours ago
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RE: High Temp Heat Pumps for fast warm-up of house
Several years ago we went away for a weekend in the mid...
By JohnnyB , 1 day ago
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@sune, will you be easy to identify and are you still s...
By Mars , 1 day ago
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RE: Gaslighting in the heat pump industry – has anyone else experienced this?
What’s remarkable from this very short thread is just h...
By Mars , 1 day ago
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RE: Testing new controls/monitoring for Midea Clone ASHP
@benson I am using the met.no forecast integration and ...
By Grantmethestrength , 1 day ago
