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Last seen: Mar 21, 2026
As of 2nd April I am now expecting to get all my family DHW and Legionella heating from the sun. That should continue until around mid October. We are...
Apologies for late arrival to this thread. Accepting the obvious and hidden problems with this installation… Is it fare to say it may be easier to p...
@derek-m another query I have in the back of my mind is how the energy consumed by the immersion heater is being calculated. in certain circumstance...
The attached sheet came from the Ecodan Data files Posted by @mjr ( thanks for that) And is for the Ecodan PUZ-WM85-VAA Can anyone explain. This...
Hi @Harriup i thought I ought to add some comments on this for Sarah to consider. Theres a good reason why there is a flow rate range quoted, and ...
On reading about your large windows and solar gain - there is usually other times of the day or on exceptionally cold day when large windows - even tr...
Thanks for info @william1066 and @kev-m interesting article. Also flow volume for our Ecodan 8.5 are easily met. Rad volumes = 111 litres 28mm ...
HI Mike Can you point me in the direction of the article you refer to above. Also - when removing a LLH, is there a way of calculating the require...
Just to recap and summarise on earlier posts: We had seen a small loss of temperature across the Flow Pipes as the water passed through the Low Loss...
yes. Quote right, accuracy and 1c increments could lead to a skewed interpretation especially when we are only looking at 1or 2c variations. ive tri...
Thanks for your comments Ian, it’s very much appreciated. Half the battle has been understanding and using the correct terms and acronyms, and realis...
not sure of the “where” bit of your question - the DT I mean is the temperature differential between Primary Flow and Primary Return. These temperatur...
Latest Posts
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RE: Advice on Vaillant Sensocomfort
@jamespa Thanks, that’s useful. It also seems the ...
By Batpred , 17 minutes ago
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RE: Debugging my legionella immersion heater
I notice this (66 is rather hot) with my legionella cyc...
By JamesPa , 6 hours 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 , 6 hours ago
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UK warm homes plan - how can it be delivered?
@editor Sobering thoughts on your article on the workfo...
By Batpred , 7 hours ago
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RE: Setback savings - fact or fiction?
You are right to be intrigued by it IMHO. SOFAIK it is...
By JamesPa , 14 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 , 17 hours ago
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RE: Vaillant Sensocomfort Time
Thank youy for the pointer. I think I have managed to ...
By ispookie666 , 1 day 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 , 1 day ago
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@majordennisbloodnok good advice, thanks for that.
By David999 , 1 day 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 , 2 days 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
