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Last seen: May 19, 2026
Does anyone have any experience of solar PV panels which replace the slates on a roof, rather than sitting as a panel on top of it? The rising price...
I just came across this: It claims that an ASHP makes an EPC rating worse than if the same property were heated with gas, because of the way the...
Derek, Sorry for not following up earlier on our conversation, but I have only just had an opportunity to have another look at my ASHP controller se...
@derek-m Derek, I'm based near Witney, Oxfordshire. Skype account uses same email addrres as here mjpatrick@protonmail.com 10am tomorow will ...
@derek-m Yes, that’s very kind of you. I can do Skype. I’m next working from home on Friday so that would be a good day. Next week I’m home on Tu...
@derek-m A big reason why, 5 years after installation, I'm still trying to optimise the system is my lack of confidence in local heating engineers....
Derek, I increased the room thermostat by 1C in one room (all 13 would have been too much) and left it for an hour. It did appear that the temperat...
Derek, The system has individual thermostats in each room, which are independent of each other so can each have their own timing schedule. I've no...
@derek-m Derek, Sorry for the delay but I've now read the remote control My instruction manual is May 2016 but I think table 10.3 is the same...
@derek-m Derek, I haven't forgotten this, but am busy with work and it will take me a while to dig out the documentation. If it's possible to i...
@derek-m Derek, The COP rating on the label on back of the pump is given as 2.66 based on Air at 7 deg and water at 55 deg. The total heat loss...
@derek-m Here are my charts, cut and pasted from an Excel spreadsheet. Mike
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RE: Heat Pump Operation in Summer - Valliant 7kW
One or two weeks of summer! Since southern Eng...
By Judith , 17 minutes ago
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RE: New Vaillant aroTherm Plus in black - When will it come to the UK?
I had a look at the manual for the pro and it mentions ...
By Batpred , 48 minutes ago
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RE: Solar Produced vs Home Consumed
It's worth adding that if you have a hot water tank and...
By JamesPa , 1 hour ago
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RE: Heat Pump Overpromising – What Were You Actually Told Before You Bought?
@editor Sorry Mars, I didn’t see a notification about ...
By Toodles , 1 hour ago
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RE: Hitachi Heat Pump being replaced with Vaillant
Yes to be configured as a volumiser. The pump is to be...
By trebor12345 , 2 hours ago
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RE: Anyone concerned about GivEnergy?
So it seems subscription day has finally arrived for Gi...
By TechnoGeek , 3 hours ago
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RE: How many people are happy with their ASHP and do you believe them?
I agree, and not. Energy prices are a largely politica...
By JamesPa , 6 hours ago
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Yes, you will need to notify them even if the inverter ...
By Old_Scientist , 6 hours ago
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RE: Heat Pump Manufacturers Recommending Buffer Tanks
@tony-stolz, I think @jamespa has already covered the h...
By Mars , 19 hours ago
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@editor "The interesting bit is that many modern invert...
By Singlespeed , 1 day ago
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RE: Ecodan & MelCloud scheduling
With the prospect of warmer weather this week, I brough...
By downfield , 1 day ago
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RE: A2A vs A2W: Which Heat Pump Would You Pick?
I reached out to MCS directly last week on this and her...
By Mars , 1 day ago
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RE: Help me keep the faith with my air source heat pump installation
My heating developed a really severe case of noise and ...
By JamesPa , 2 days ago
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!
@l2jad I was just thinking all things being equal. Our ...
By AndrewJ , 2 days ago



