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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...
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Degrees of Separation
Latest Posts
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RE: Heat pump installation quotations
@batpred The only draughty place is in the living ro...
By sttpd1917 , 15 minutes ago
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Don't you dare. You just carry on as you are; as @batpr...
By Majordennisbloodnok , 31 minutes ago
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RE: Heat pump design review please: 5 kW Vaillant aroTHERM Plus heat pump
@ragtime27 some rooms in our house only have one place ...
By Judith , 36 minutes ago
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RE: Help me keep the faith with my air source heat pump installation
I didn't know about those, they look like good pieces o...
By JamesPa , 4 hours ago
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@mkz, that's very helpful. Even if Urban Plumber are no...
By Majordennisbloodnok , 4 hours ago
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RE: Several AC coupled batteries
That is a good point, a manufacturers can stop trading,...
By Batpred , 4 hours ago
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My first question is why bother with the auto balancin...
By JamesPa , 5 hours ago
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RE: Indevolt Batteries UK Support & Info Thread
Hi @hanno - good question. The range of hybrid invert...
By Transparent , 5 hours ago
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RE: GivEnergy inverter tripping due to over-voltage?
@transparent the inverter was installed in 2021 and afa...
By Tim441 , 5 hours ago
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I share the same experience as @majordennisbloodnok hav...
By Old_Scientist , 6 hours ago
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RE: Say hello and introduce yourself
I hope so, @toodles. It's not often that we see a situa...
By Majordennisbloodnok , 9 hours ago
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RE: Electricity price predictions
Good point, I do expect the bonus of putting my energy ...
By Batpred , 1 day ago
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RE: Daikin ESPAltherma and Home Assistant installation
@bash, something we haven't touched on already relates ...
By Majordennisbloodnok , 1 day ago
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RE: Air source heat pump roll call – what heat pump brand and model do you have?
Vaillant arotherm plus 12kW. Installed March 2025. Ex...
By Harebell , 2 days ago
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