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Last seen: May 19, 2026
OK thats a pity it would have been good to see if/how defrost changed as a result of switching off night shift and overnight there would have been ple...
My Vaillant was defrosting every 45-60mins overnight (chart shows FT). As you can see it doesnt fully recover from the defrosts because noise reducti...
Something odd about this diagram; the refrigerant is moving in the wrong direction for defrost - warm refrigerant from the compressor should be headin...
Thats a bit suspicious. Some (older?) heat pumps apparently defrost on a timed cycle rather than on demand. I wonder if these are in that category (...
In short, like much on FB, this is nonsense. The amount of heat lost by the radiators to the room (which is what you care about) depends on the aver...
It will be good then to see some plots tomorrow morning to compare! I'm beginning to wonder from your description if it's delaying starting defrost...
I have one fancoil in an otherwise all radiator system. I am working on adding diy fan assistance to another radiator. The latter is for cooling onl...
I can't comment on the defrost algorithm or numbers. If the heat pump is not recovering temperature after defrost, I would turn off night shift. Be...
Latest Posts
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RE: Lower electric tariffs for heat pump users
@toodles Thats a shame you cant export to Axle. Current...
By Richard24738 , 1 hour ago
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RE: UK warm homes plan - how can it be delivered?
@falesh not a subject I know a lot about, but first, on...
By Mars , 1 hour ago
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RE: Loud noises in the night - and one for the toolbox?
So that phenomenon is usually referred to as "water ham...
By Transparent , 2 hours ago
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RE: Sizing an ASHP; Heat loss and kW
@majordennisbloodnok Thanks for your reply. I agree wit...
By GutoFfowc , 2 hours ago
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RE: ASHP Capacity loss with aging
@editor Just a thought really but, if the heat pump is ...
By Toodles , 3 hours ago
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RE: Daikin Altherma 3 with Fan Coils in Puglia (Italy)… Sanity Check on System Operation
Hi Mars,Thank you so much for your response,I really ap...
By Simon_JM , 9 hours ago
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RE: Setback savings - fact or fiction?
Yes, also the higher OAT end is possibly a smidge high ...
By RobS , 17 hours ago
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Hi Mars, I've sent you a request to connect me with a...
By sttpd1917 , 20 hours ago
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Grant Aerona R290 (15.5kW) - How is DHW Target Temp calculated?
Hello all, We have just had a Grant Aerona R290 insta...
By TaffontheTaff , 1 day ago
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RE: Advice on Vaillant Sensocomfort
The latest Vaillant announcement I saw said that they w...
By JamesPa , 1 day ago
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RE: Debugging my legionella immersion heater
I notice this (66 is rather hot) with my legionella cyc...
By JamesPa , 2 days ago
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RE: DIY Heat Pump Installations: Navigating Legal and Regulatory Hurdles
@transparent I thought you would spot that wind turbine...
By Batpred , 2 days ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
@swwils there is no logic to oversizing a heat pump. It...
By AgentGeorge , 2 days ago
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RE: Vaillant Sensocomfort Time
Thank youy for the pointer. I think I have managed to ...
By ispookie666 , 3 days ago
