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: Performance of Heat Pumps in Mild Weather
@robs Thank you. Interesting! I presume that the switc...
By Heatgeek , 7 hours ago
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RE: Ideal Logic ASHP - change from 55°C to 35°C Heating?
@phil-s is this something you could potentially advise ...
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RE: Thermistor for a Grant QRSC180SL
@neil is this something you could advise or assist with...
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RE: Questions on my Hitachi Yutaki SCombi Heat Pump
OK, thats good and low. With low flow temperatures lik...
By JamesPa , 13 hours ago
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RE: Help me keep the faith with my air source heat pump installation
@jamespa “They are all equal but, some are more equal t...
By Toodles , 14 hours ago
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RE: Is it KISS or constant – weather compensation vs. set flow temperature?
@cliffhanger Mine has a 'space heating off' setting! O...
By JamesPa , 18 hours ago
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RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's
Thank you, that helped in my understanding. I believe ...
By trebor12345 , 19 hours ago
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RE: Solar Power Output – Let’s Compare Generation Figures
@old_scientist As another example of errors / differenc...
By Toodles , 19 hours ago
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RE: Replacing Worcester oil boiler with an ASHP
Is this something you are thinking of doing? Or has thi...
By Cliff-Arnold , 1 day ago
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RE: Say hello and introduce yourself
Hi Mars Thanks for inviting me to join the forum, I h...
By Cliff-Arnold , 1 day ago
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RE: Who's your electricity provider and what's your tariff?
@agentgeorge Not with Eon Next. The only reson I left O...
By Andris , 2 days ago
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RE: How hard and expensive would it be to change panel and add battery?
The difficulty with this discussion is that it's referr...
By Transparent , 2 days ago
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@rhh2348 it’s clear you are wanting to run your heat pu...
By SUNandAIR , 2 days ago
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Is this normal? Click of the DHW returning to space heating
This has been bugging me for a while and I just wanted ...
By Grantmethestrength , 3 days ago
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@sandman1600 you need to measure whats going on real...
By davidnolan22 , 3 days ago
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@brandon-r is this a project that you could assist with...
By Mars , 4 days ago
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Has anyone installed these on their ASHP fed radiator s...
By Grantmethestrength , 4 days ago
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Just an update on the responses received by Smart Heati...
By Eliuccio , 5 days ago
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RE: Is your gut better than Math
By SUNandAIR , 5 days ago
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RE: Would You Find Value in a Premium Installer-Supported Forum?
We are very pleased to announce that Brendon Uys (@heac...
By Mars , 5 days ago
