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Last seen: May 17, 2026
I don't know exactly how long it takes to heat up (and to specify I would need to specify conditions) but in very general terms its 24 hours+ for the ...
I dont, because I dont turn it off unless Im going away for several days, and in that case the technology to schedule a timed restart (and if necessar...
Before I got a heat pump I turned down my gas boiler flow temperature from 70 to 50 which was the lowest it would go. The result was a much more comf...
OK. What Im seeing looks fairly normal TBH: 1 start per hour is good (1028 on off cycles in 1303 hours); there is no evidence of short cycling Un...
In general pure LWT mode will be more efficient because it means you are operating at the lowest flow temperature. It may well, depending on house, a...
Wow, that sounds like fun. There is another thread where someone with a Hitachi heat pump (featuring a more conventional vertical fan) describes a si...
@davidb Further to my previous post one further comment I would make is that 300l system volume is not consistent with 7 radiators. Unless you have a...
Since May 2025 it no longer a requirement in England to benefit from permitted development rights (ie planning consent without having to make a planni...
@davidb Once again I agree with Adrian. Houses have memory and different bits cool at different rates. So for example (this is just one mechanism...
I agree with the comments made by @adrian both about the fire and the DHW. You should also bear in mind that, with a low loss house, COP isnt so impo...
I think its small, but off course it could happen so please dont rely on it. They do a sample check of some kind on installers and my system was chec...
I have been wondering that myself. The fact is that, even with the buffer (meaning that the secondary pump doesn't have to push water through the pi...
Latest Posts
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RE: Setback savings - fact or fiction?
You are right to be intrigued by it IMHO. SOFAIK it is...
By JamesPa , 3 hours 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 , 5 hours ago
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RE: Vaillant Sensocomfort Time
Thank youy for the pointer. I think I have managed to ...
By ispookie666 , 20 hours ago
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RE: Forum updates, announcements & issues
I have been doing a lot of work on the site lately and ...
By Mars , 20 hours ago
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@majordennisbloodnok good advice, thanks for that.
By David999 , 24 hours ago
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RE: My Grant R290 9kW Heat Pump Installation
I am following this thread with great interest and than...
By TaffontheTaff , 1 day ago
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RE: Sizing an ASHP; Heat loss and kW
You can't measure heat loss with a website. But you ca...
By JamesPa , 2 days ago
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RE: Estimating true heat loss from twelve months of consumption data
@ian33a — I have a sort of residual interest in this pr...
By cathodeRay , 2 days ago
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Hi, Thank you. So its a Daikin Altherma 3M...
By Lbart68 , 2 days ago
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I have a Contactum CU. Would the below RCBO (descriptio...
By Batpred , 2 days ago
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RE: Samsung gen 7 HP 12kw - auto control issue and water law
@chainreaction Agree with @broadsman , it seems many ...
By Batpred , 2 days ago
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RE: Anyone concerned about GivEnergy?
@transparent Thank you and appreciate your timely reply...
By SUNNYSKIES , 2 days ago
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RE: Grant Aeona 3 R32 cycling with weather compensation.
The hot water heating looks normal. The heat transfer ...
By GrahamF , 2 days ago
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RE: A2A vs A2W: Which Heat Pump Would You Pick?
Good questions @temperature_gradient. My understanding ...
By springswood , 2 days ago
