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Last seen: Jun 26, 2026
The Grant LLH works well for me with the 3kW immersion programmed to give supplementary heating during defrost mode when the LWT drops below a pre-set...
I had a similar pantomime with my DNO. My incoming fuse is 80A with 25mm2 meter tail L&N incomers from external fuse and meter box to internal con...
@NJT, same here with my experience. 50degC design, which at the time I didn't query. But the same set up is now set to 45degC max, and most of the tim...
When comparing quotes, it's very important to try to ensure technical parity. Very crudely, the higher the system design temperature, the lower to cap...
There's standards and then there's standards, in order of precedence: Legislative, European/international/British, trade/industry codes of practice,...
Hi @mellow, pics of our Grant thermostat below. Rotary control but digital setting. Standard on their pre-plumb cylinders I believe. First one we had ...
@jml likely a 150 litre cylinder would be ample for you, with immersion backup. The standing losses on modern cylinders are very low, so once charged ...
Hi @JML, it's great to see these discussions, and the help many experienced and knowledgeable people here will provide. There are a lot of variables t...
@mellow that will be fine to have the internal pump running on, it will be to remove residual heat and pressure from the condenser inside the ASHP, an...
@mellow this is good to hear. The tried and tested solution of 'pratt about with it until it finally fixes' seems to have come good for you. 😉 Your...
Grant charges me £250.80 for a combined service of a 10kW Aerotherm ASHP, plus a 210L pre-plumbed cylinder. 'ServicePlan2' A condition of the product ...
Excellent observation @derek-m, modern well insulated homes with low infiltration/exfiltration AC/h values tend to suffer from overheating upstairs. T...
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Degrees of Separation
Latest Posts
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?
Volumisers are normally plumbed so that they are in the...
By JamesPa , 34 minutes ago
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@toodles possibly. The £9k labour charge for 4-5 days w...
By AndrewJ , 5 hours ago
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RE: Plug and play solar. Thoughts?
My thought is simple. Bring it on and bring on plug in...
By JamesPa , 9 hours ago
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RE: Heat Geek mini store vs pump size
Yes I agree, that’s why Heat Geek have most likely sele...
By Tomtheheatingengineer , 23 hours ago
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RE: Who's your electricity provider and what's your tariff?
@chandykris Swings and Roundabouts, you win some…. ...
By Toodles , 23 hours ago
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@tomtheheatingengineer, thank you, and welcome to the f...
By Mars , 1 day ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@majordennisbloodnok @tomtheheatingengineer For my ...
By JamesPa , 1 day ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
There is scope for product development here. I for one...
By JamesPa , 1 day ago
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RE: Is the "divide by 2900" rule still valid?
Really flow rate is a pipework limitation not a water p...
By JamesPa , 2 days ago
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RE: The good, the bad and the not that great – my heat pump installation
@burtis, I’ve followed this thread pretty much from the...
By Mars , 5 days ago
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
First time poster here but I can share my experience as...
By SCH , 5 days ago
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RE: Is it the house or the equipment?
...which, I've found out, is pretty much impossible to ...
By Majordennisbloodnok , 5 days ago
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