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Last seen: Sep 12, 2026
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...
Absolutely, due to a combination of genuine unknowns (eg air change rate, effect of thermal bridging and even uncertainty in U values of certain mater...
Our posts crossed and I have added some more explanation/clarification In answer to your comment - no you dont know where in the range it lies, and ...
Its not perfect but the world isnt perfect . If one were to set up a controlled experiment with comprehensive logging that would be better than any o...
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Degrees of Separation
Latest Posts
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RE: Siting of the external sensor on a heatpump
I agree. However I would also (primarily) expect that ...
By JamesPa , 4 hours ago
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RE: Next steps on my ASHP journey: Radiators and Pipework
You should (almost) always reject having a buffer, by w...
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RE: Navigating the World of Refrigerants In Heat Pumps: A Guide for Homeowners
Indeed we are invvestigating AC at present and are havi...
By Toodles , 11 hours ago
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RE: Is it the house or the equipment?
@majordennisbloodnok I do sympathise. On the original...
By springswood , 13 hours ago
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No, but the heat pump must be capable of delivering a S...
By JamesPa , 16 hours ago
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Sorry to hear about the problems, its going to be somet...
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RE: Daikin ESPAltherma and Home Assistant installation
It's laziness lol The PV system is very chatty, meter...
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RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
R (The R Project for Statistical Computing, I use it wi...
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RE: Vaillant Arotherm Plus 7KW need a service on it
booked it with Vaillant. will use them until i can find...
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RE: Adventures in heat loss calculations
I have seen it stated that the declared calorific value...
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RE: Two heating zones to one zone
@transparent Many thanks. The garage is fairly well ...
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RE: Vaillant Aurotherm - Heater Wire Position
Ah, good point. I need to check if this was installed i...
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@batpred thanks for getting a copy. Appreciate the supp...
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We have a 6.56kW solar PV system (16x 410W panels) inst...
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