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AllyFish
@allyfish
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Noble Member
Joined: Oct 31, 2022
Last seen: Sep 10, 2025
Profile Activity
Topics: 23 / Replies: 471
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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...

1 year 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...

1 year 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,...

1 year ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
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 ...

1 year 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 ...

1 year 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...

1 year 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...

1 year 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...

1 year 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 ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Advice on ASHP choice needed

Excellent observation @derek-m, modern well insulated homes with low infiltration/exfiltration AC/h values tend to suffer from overheating upstairs. T...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Buffer tank in primary circuit?

Hi @Mike, says 65degC on the Samsung Data sheet/p> Other data sources support this:

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Buffer tank in primary circuit?

Hi @roel. Welcome 🙂 The Samsung Gen6 12kW ASHP can heat water up to 65degC, which would charge your DHW tank to 60degC within a reasonably short ti...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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