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Last seen: May 8, 2026
@cathoderay You could try turning all rad TRV's off except one, confirm that one works as expected, move through them all one by one? Our plumbin...
@cathoderay Great the PHE seems to be ok! Any pipes outside clearly need to be lagged, but indoor ones probably not. Any pipework inside the ther...
If you have a PHE, then there will be a temp drop between the two separate liquids, and this temp drop is what pushes the heat flow from one liquid to...
Usually heat exchangers used in plumbing are bphe (brazed plate heat exchangers). They have two connections at each end, and should always be used in...
@howiewsl There seem to be two issues: £5 a day It's not warm enough Taking the first of these - 'since you've a 5p/24p tariff, the number of...
It’s a lot simpler to spec a gas boiler than an ashp. While there are similarities - modern examples of both have huge modulation ranges, so don’t ju...
We had a vent axia HR25 for a few years, it worked quite well. It's a fan replacement unit, with heat exchanger - there are quite a lot on the market...
I'm sorry you're having trouble with it, I hope it can be made to work better. Apologies in advance for a flood of questions, which hopefully will he...
I think an anaerobic digester has to run warm, and it uses some of the available organic material to keep itself warm. For that reason, it works bett...
About 4 months ago I finished our diy GSHP. I think your controller is much more sophisticated than the one I made - our house is very well insulated...
We have a 30kWh Nissan Leaf with V2G on a trial by OVO, which we've been on for almost 2 years. The car is on our driveway connected by a Chademo con...
Latest Posts
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RE: Sizing an ASHP; Heat loss and kW
Annual consumption is almost certainly better than an E...
By JamesPa , 58 minutes ago
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RE: UK warm homes plan - how can it be delivered?
No rule that says we do so far as I know. Like much o...
By JamesPa , 1 hour 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 , 2 hours ago
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RE: Setback savings - fact or fiction?
Indeed, I can well imagine that a heat-pump based syste...
By PeterWurmsdobler , 5 hours ago
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Loud noises in the night - and one for the toolbox?
I was woken at 5am on Sunday to a very loud noise, akin...
By JamesPa , 6 hours ago
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RE: Advice on Vaillant Sensocomfort
The latest Vaillant announcement I saw said that they w...
By JamesPa , 7 hours ago
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RE: Debugging my legionella immersion heater
I notice this (66 is rather hot) with my legionella cyc...
By JamesPa , 19 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 , 19 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 , 1 day ago
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RE: Vaillant Sensocomfort Time
Thank youy for the pointer. I think I have managed to ...
By ispookie666 , 2 days 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 , 2 days ago
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@majordennisbloodnok good advice, thanks for that.
By David999 , 2 days 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: Estimating true heat loss from twelve months of consumption data
@ian33a — I have a sort of residual interest in this pr...
By cathodeRay , 3 days ago
