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Last seen: Oct 27, 2026
It may make sense but its not as expected, it should be negative. You are plotting delivered energy to the house vs DT and if there is a positive con...
I think trying to deduce flow rate from an instantaneous measurement of deltaT on a system where you dont know the house loss is a stretch to say the ...
That may not be the case, because its not necessarily the case that PWM = 100% means that the flow rate is 1200l/hr as depending on the pump character...
I thought so Whether you have to take them into account or not depends on the thing you are measuring/the calculation you are doing! A simple drawi...
Or where you can fix the pwm% as you can eg with Vaullant and doubtless others I'm now confused. I thought that there was no point in your syst...
@cathoderay and others. I think there may be some confusion over the contributions from external sources creeping in. They may be a variable propor...
@rob-of-york I think this a very reasonable way to approach the problem. Whilst I dont like determining things based on a single measurement point ...
@cathoderay Good bit of analysis. Daily would suffice for consumption (as you say more frequently is needed for temperature); my main tool...
I am amazed that there is not something out there to measure depth, either by float or laser. I can buy a laser distance meter for £30, it wouldn't t...
Take a guess, do the head loss calculations at the flow rate for DT 5. If it's ok with some margin, stop worrying about head loss. If this is the c...
I would too if it were easy, but he says it isn't. In that circumstance I would probably 'suck it and see.'. Assuming the circulator head is suffic...
... which hopefully you don't have to do if there is a reasonable amount of headroom! But if there isn't then fun awaits I would be willing to b...
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Degrees of Separation
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@editor I completely forgot to document wha...
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@trebor12345 That curve looks healthy to me. I woul...
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RE: Tradespeople on Their Phones: What’s Acceptable When They’re Working in Your Home?
Actually, that's a very important point. I've only ev...
By Majordennisbloodnok , 18 hours ago
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RE: The Changing Jet Stream Could Challenge UK Air Source Heat Pumps
@susannasaunders can I just add to @rob-of-york s comm...
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RE: Aerotherm and weather compensation
These are likely inked. The basic explanation is tha...
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RE: Electrical works for air to air heat pump
agree with above. I have not had extra costs added wh...
By Batpred , 23 hours ago
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Good to hear that you found a solution. Absolutely a...
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RE: Are there any comparisons of DHW heat stores around?
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RE: How will removing the standing charge on gas bills benefit heat pumps?
The BUS grant funding for 2026/27 will run out at the c...
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RE: Say hello and introduce yourself
@e-a-west as the good Major said, welcome to the forums...
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Yes I actually have a copy of a tool that whenever a ce...
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@editor Hi, To resolve this, please tap on the A...
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