Last seen: Dec 13, 2025
100m2 5kw £11000-£7500=£3500 pick 3 radiators
I think the theory should be that you save what the difference in heat loss is between normal and lowest temperature that is reached during the setbac...
I didn’t take one out and surprisingly Boxt didn’t try to sell me one. I’m sure they will correct that oversight. The Vaillant guarantee says: Dur...
@chansug for me the survey was done by the engineer that did the installation, but I think that is not a given and the install might be done by a diff...
From my experience I’ve learned the following: the heat loss calculation is definitly an estimate. For starters the u values of the materials and t...
you can play around with the answers to get to the right value. Like you I already knew the heat loss so I changed the build year until I got the righ...
You might want to give Boxt.co.uk a try. At least for me they had octopus level price, but were able to proceed quite quickly. They also give an upfro...
Maybe the analogy is imagining that cars could just drive faster through those single carriage section. All that acceleration and extra friction would...
My answers to your initial questions: 1. They are all close enough and match your usage figure to be right. I’d say the not so local firm is wrong t...
it’s because there are 10kwh hiding in every Liter of oil.
Hi, I think partly the problem is the immediate feedback that the electricity meter provides, versus the oil boiler where (I presume) you just get the...
No answers here, just some observations. Your flow temperature is reasonably high, which maybe indicates slightly smallish radiators and would give ...
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RE: Setback savings - fact or fiction?
No need to create a new thread, @sheriff-fatman. You do...
By Majordennisbloodnok , 1 hour ago
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RE: Power outages and storms: A surprisingly good DNO experience
Well done to Scottish Power for doing a good job. Well ...
By Majordennisbloodnok , 2 hours ago
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RE: Advice for a novice on Mitsubishi Ecodan 6kW
Fair point. The highest frequency of defrosts I'd seen...
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RE: Heatpunk Floor plan issues
It's usually the complete opposite... seldom that Safar...
By Mars , 3 hours ago
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RE: RDSAP10 effect on existing heat pump EPC rating?
@mike-patrick interesting update - thanks.I've been thr...
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RE: Recommended home battery inverters + regulatory matters - help requested
I remember reading in some inverters. They mandate a se...
By Batpred , 4 hours ago
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RE: Fan is clipping ice build up from the front of unit.
@majordennisbloodnok I’ll not go there thanks! Toodles.
By Toodles , 6 hours ago
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RE: Running from backup generaor in powercut?
@majordennisbloodnok Back in the 80’ or 90’ we had a te...
By Toodles , 6 hours ago
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RE: Running my new Nibe ASHP efficiently
I'm new to the forum. Did you get a reply to this last ...
By Mike @ Camelot , 7 hours ago
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RE: ASHP Energy Consumption: Aira 12kW heat pump
@grantmethestrength MCS requirements for DHW capacity h...
By Toodles , 8 hours ago
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RE: New Mitsubishi Ecodan 11.2kW installation - L9 errors and maybe more
Great to hear! I just figured this out a day or tw...
By anotherdaveuk , 9 hours ago
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RE: Help me keep the faith with my air source heat pump installation
@adamk I'm observing my own system at low temperatures ...
By dr_dongle , 14 hours ago
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RE: Free Ecoheat Heat Pump Install
@deltona Yes older houses are problematic like that, bu...
By bontwoody , 1 day ago
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RE: Radiator sizing sanity check
As I mentioned early on the cost of supplying and fitti...
By JamesPa , 1 day ago
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RE: Electricity price predictions
Great point, one of the key ones in my chat with Octopu...
By Batpred , 2 days ago
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RE: New Fogstar 15.5kWh upright solution
Let me point out that there are many Chinese suppliers ...
By Transparent , 2 days ago
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RE: Weather compensation- why you should use it
@majordennisbloodnok — The Two Ronnies Mastermind sketc...
By cathodeRay , 2 days ago
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Just realised that this image of the cylinder cupboard ...
By Sheriff Fatman , 2 days ago
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RE: Rodents! A word of warning for heat pump owners
Two thoughts: 1: Let's ask @david-s if Primary Pro in...
By Transparent , 2 days ago
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RE: Solis S6-EH1P8K-L-PLUS – Why I Chose It and What I’ve Learned So Far
In the diagram below, I describe my understanding of th...
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