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Last seen: May 20, 2026
In my cynical opinion the customer having faith is not the purpose of the survey. The purpose is to protect the installer by following a process set ...
How would that explain the temp difference across the LLH which you measure? More likely the air is in his head!
So what have they done 'cos its got to be serious to get what you measure. Faulty secondary pump? Valve left closed? Fitted a bypass loop? The heat...
Thats exactly how I sized my heat pump. Surveys (2 off, each taking 3 hrs, one of which I paid £300 for) said 16kW, measurements of gas consumption s...
I suspect its mainly that you get the views. Upstairs too warm is going to become something of a problem as insulation gets better, particularly giv...
Good, what Id expect, you may need to tweak the WC as the temperature cools down, but hopefully thats it As you obviously realise there is nothin...
You might not be able to, but your installer definitely could. If you swap flow and return either on the primary side or the secondary side then basi...
With that drop its clear that very little hot water is getting from the primary into the secondary so either pump problem or piping problem. Has he p...
Really sorry to hear this, I was expecting no change not a deterioration and I must therefore eat humble pie following my comment that swapping a smal...
made of brass not plastic, proper square hole same shape as bleed screw. I did a quick search and they seem relatively rare, most seem to be a (pres...
Definitely. 8C DT is higher than the default design DT for most heat pump systems which is 5 This has the effect of reducing the average flow temp b...
Thats a great analysis and |I doubt any heat loss calculations adequately deal with this. Put another way there is an (probably) unaccounted for loss...
Latest Posts
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RE: Daikin Altherma 3 with Fan Coils in Puglia (Italy)… Sanity Check on System Operation
@bobflux thanks also for your insight and the +1 ! reg...
By Simon_JM , 17 minutes ago
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RE: Loud noises in the night - and one for the toolbox?
Sounds like something expanding somewhere, perhaps then...
By JamesPa , 2 hours ago
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RE: Heat Pump Operation in Summer - Valliant 7kW
Personal choice but without a doubt my heating pump cop...
By JamesPa , 3 hours ago
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RE: MCS 2.0 - Changes in January 2025
I had a few quotes and none of them says much about the...
By Batpred , 4 hours ago
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We’ve had a mention in the Financial Times. 👀 ...
By Mars , 4 hours ago
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RE: Estimating true heat loss from twelve months of consumption data
Got thinking about an easy way to measure heat output o...
By Travellingwave , 7 hours ago
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RE: ASHP Capacity loss with aging
I see where you were also going with this, its is likel...
By ASHP-BOBBA , 9 hours ago
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RE: Renewables & Heat Pumps in the News
Interesting prompt about whether some of the solutions ...
By Jeff , 10 hours ago
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RE: UK warm homes plan - how can it be delivered?
Agree it could sometimes be self inflicted, but I also ...
By Batpred , 16 hours ago
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RE: Lower electric tariffs for heat pump users
I did some modelling using our real consumption figures...
By ChandyKris , 18 hours ago
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RE: Sizing an ASHP; Heat loss and kW
There will be no changes internally; ground floor is al...
By GutoFfowc , 22 hours ago
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OK, here's a rather off-the-wall discovery I've made th...
By Majordennisbloodnok , 22 hours ago
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RE: Indevolt Batteries UK Support & Info Thread
I'd like to re-visit this information from Indevolt. ...
By Transparent , 24 hours ago
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RE: Advice on Vaillant Sensocomfort
I just had an answer from Vaillant technical, they only...
By Batpred , 24 hours ago
