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Last seen: Jun 1, 2026
@painter26 — as @jamespa says, it's for filling and re-pressurising the main circuit that goes round the rads whenever that is needed, using water at ...
If you look at the side of it, you will see a glass observation port with with a scale marked on it, and behind that a little disk that moves up and d...
I also need to correct something I said by mistake earlier: "Given the relationship between OAT and (power and) energy in is tolerably linear (energ...
@robs — I am still not persuaded that you can take an observation at one OAT from one date, and then say because "the OAT was steady at 6C for multipl...
Thank you! It doesn't sound alarming to me, given the context, occasional, no leaks and sensitive hearing. Maybe other can come up with a (benign...
@painter26 — welcome, and thank you for your clear description of what you have, and your questions. First of all, I think you are largely on top of...
@benson — good point about the defrosts, as you know they push up the OAT, which is actually the AIT, Air Intake Temp, by several degrees, which could...
Latest Posts
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RE: Anyone concerned about GivEnergy?
Hmm...I really need to think this through. Another pote...
By KevH , 21 minutes ago
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This is an interesting post and a breakdown analysis of...
By Escapist , 3 hours ago
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RE: A2A vs A2W: Which Heat Pump Would You Pick?
I tend to have a problem with absolutes, @deltona. Ye...
By Majordennisbloodnok , 7 hours ago
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RE: Home automation and the cloud; is there a better way?
I totally agree, @wully, with your point about cloud/lo...
By Majordennisbloodnok , 7 hours ago
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RE: Rural burning – I've had enough
@transparent, environmental protection emailed earlier ...
By Mars , 8 hours ago
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RE: Cooling with with air to water heat pumps
@etchedpixels A few warmish days or a bit of snow an...
By Papahuhu , 11 hours ago
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Good points @etchedpixels And it occurred to me that...
By springswood , 11 hours ago
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Take a look at this link of what I did to encapsulate a...
By ASHP-BOBBA , 12 hours ago
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RE: Help me keep the faith with my air source heat pump installation
Thanks and noted. I dont see Vaillant doing a general ...
By JamesPa , 12 hours ago
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RE: Solar Power Output – Let’s Compare Generation Figures
Greetings my fellow heatwave sufferers! Over here, we n...
By MK4 , 13 hours ago
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RE: Outdoor Battery Solutions?
We are on the same tariff, on 3.5p/kwh. So until early ...
By Batpred , 1 day ago
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RE: Solar Yield vs Temperature.
@old_scientist Fair enough, that may be similar to t...
By Batpred , 1 day ago
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RE: Lower electric tariffs for heat pump users
I suspect that would not be a difficult decision, if I ...
By Batpred , 1 day ago
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RE: Vehicle-to-Home with a Heat Pump: Is the Technology Ready and Which EV Should I Buy?
Absolutely. We are going through another period when ou...
By Batpred , 1 day ago
