Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!
Last seen: Oct 20, 2026
OK I found the original post about 4.88kW and I also agree with @editor above. Firstly It wont help to operate with the thermostat as opposed to on ...
Im sorry to hear about your troubles but its definitely good that the buffer and secondary pump has been removed. You are on the right path, keep the...
The Mitsubishi R29O pump has 2 compressors to achieve exactly that. Sofaik the only domestic one so far to do this
@anca1808 Lots of ideas above about what could be causing your issues. Nobody, including me, can be definitive because we don't have your system in...
I concur in principle with @old_scientist however there are some points to consider 1. your house has a heat input other than the heating, due to wa...
Its good to hear that you are pleased with the outcome. I agree with @old_scientist that cycling is to be expected (and is unavoidable) in milder tem...
That needs investigation. Its currently mild so you can do things that you cant do when its cold. Turn the ASHP off completely for 3 hours (preferab...
The spec for your model calls for a total of 39l for 'cooler climates'. I think we are in the 'warmer climate' region according to the relevant EU di...
Im going to cut to the chase. From all you have said, my guess is that you have an 8.5kW pump in a 4-6kW house controlled by thermostats (I thi...
I presume the diverter valve then, which would make sense. As you say you would expect this to be on the inlet to the BT
Is it a 2 way valve or a 3 way diverter valve. Normally the (3 way) diverter valve is the only motorised valve needed. As you say taking some tempe...
@davidnolan22 I will continue to think about this. We could do with a comment from @bobtskutter on the pump arrangement , he is good on the hydron...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Safety study for plug in batteries out to tender - looks like Q3 2027 at best before legal
I only see 1 phase, ending in March 2028?
By dansus , 16 minutes ago
-
RE: Indevolt Batteries UK Support & Info Thread
@editor Manually setting the charging times and rates o...
By dansus , 48 minutes ago
-
RE: 15kw pump for 225m2 1990's house - over kill?
@carpenterstation I think you must mean “The whole ho...
By GrahamF , 2 hours ago
-
RE: How much of your renewable and home setup would still work if the internet went down?
Ours is similar to James, but with a few optional tweak...
By Batpred , 3 hours ago
-
RE: Renewables & Heat Pumps in the News
Yes, this is a swiss and german standard I believe, Vai...
By Batpred , 4 hours ago
-
RE: BT cuts you off, Plusnet blames Openreach... welcome to “seamless” broadband switching
My Vodafone FTTP broadband was down for a month when I ...
By JamesPa , 7 hours ago
-
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!
@editor FWIW my problem was resolved, eventually, after...
By BigFish , 10 hours ago
-
My heating has been off and DHW on throughout the summe...
By DavidAlgarve , 13 hours ago
-
RE: Anyone concerned about GivEnergy?
The GivE forum seemed to have survived the collapse of ...
By downfield , 14 hours ago
-
RE: How quickly would you want/expect heat recovery to take from setback?
@singlespeed I had better explain how my radiators are ...
By Toodles , 14 hours ago
-
RE: Cooling/heating with one unit
@mrkfm The Solo has a small capacity and only suitable ...
By dgclimatecontrol , 15 hours ago
-
First you need to know how much thermal energy you'll n...
By bobflux , 1 day ago
-
RE: Renewable Heating Hub Homeowners' Q&A Podcast
Come for the low-carbon homes. Stay for George Clarke’s...
By Mars , 2 days ago
-
RE: How should the Boiler Upgrade Scheme be reformed?
Not quite, regular A2W heat-pumps need a load of extra ...
By Temperature_Gradient , 4 days ago
-
RE: Heat Geek installations: share your experiences
one thing i learnt from reading people’s comments and e...
By Batpred , 4 days ago
SPONSORS
