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AllyFish
@allyfish
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Noble Member
Joined: Oct 31, 2022
Last seen: May 2, 2025
Profile Activity
Topics: 22 / Replies: 463
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Reply
RE: Is the Grant controller a thermostat?

@dodgyknee this sounds familiar Yup, I played around, got the supplementary heating indicator to appear on the Grant controller, so all appeared to ...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is the Grant controller a thermostat?

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...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump install overloads home fuse.

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...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How I Negotiated a Better Deal on My Heat Pump Installation with Octopus Energy

@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...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How I Negotiated a Better Deal on My Heat Pump Installation with Octopus Energy

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...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New Standard Set to Revolutionise Heat Pump Installations in the UK

There's standards and then there's standards, in order of precedence: Legislative, European/international/British, trade/industry codes of practice,...

9 months ago
Forum
Government Schemes, Regulations, Planning & Organisations
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RE: Domestic hot water timer doing crazy things on my Grant Aerona3 10kW air source heat pump

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 ...

10 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: New Vaillant 7kW aroTherm ASHP or oil boiler dilemma/decision??

@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 ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New Vaillant 7kW aroTherm ASHP or oil boiler dilemma/decision??

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...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Domestic hot water timer doing crazy things on my Grant Aerona3 10kW air source heat pump

@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...

10 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Domestic hot water timer doing crazy things on my Grant Aerona3 10kW air source heat pump

@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...

10 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?

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 ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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