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Last seen: May 31, 2026
I suspect it is very common for installers to avoid using weather compensation, and instead set a constant high flow temperature. It makes for a quic...
@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...
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I agree with your analysis from the physics standpoint....
By JamesPa , 1 hour ago
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How can they stop anybody from signing up to a heat pum...
By L8Again , 2 hours ago
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RE: Indevolt Batteries UK Support & Info Thread
@indevolt-tech When you say 'dedicated switched fused ...
By JamesPa , 3 hours ago
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RE: Electricity price predictions
I'm very much grounded in systems too, so I think we're...
By Majordennisbloodnok , 5 hours ago
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RE: Do I need to change the control unit when replacing my Ecodan Air Source Heat Pump
Unfortunately the answer is Yes you will need a new FTC...
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RE: PV and battery long payback - sense check query
So if it helps I was recently quoted about 8 grand for ...
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RE: HomeTherma Is Live: A New Home-Energy Platform Built Around the Homeowner
Signed up!
By bobflux , 1 day ago
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RE: Has anyone seen this problem before? Huge anticycling times
Oh dear. Glad it was replaced. I have been mighty imp...
By JamesPa , 2 days ago
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RE: Can I start an argument about buffer tanks please? 🙂
Dont, just adjust the LSVs to get different temperature...
By JamesPa , 3 days ago
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RE: Heat pump running costs – what has actually worked for you?
I installed the air source heat pump in January 2026, i...
By bobflux , 3 days ago
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RE: Grant Aerona Air to Water R290 6.5 kW - Quiet Mark and Silent Running
Thats all interesting. DHW on my Vailant seems to respe...
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