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AllyFish
@allyfish
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Noble Member
Joined: Oct 31, 2022
Last seen: Oct 1, 2025
Profile Activity
Topics: 23 / Replies: 479
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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 ...

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)
Reply
RE: Domestic hot water timer doing crazy things on my Grant Aerona3 10kW air source heat pump

Hi again @mellow, had a play with my DHW timer to see if I can replicate your issue. Right, there are four zones and each can have up to 4 time period...

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

Hi @Mellow, I hope I can help, as I have the same Grant 10kW ASHP, Grant branded Heatmiser 4 channel DHW thermostat and a 210L Grant pre-plumbed cylin...

1 year ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Dodgy Vaillant ASHP foundation & Eddi Diverter Making Central Heating Water Dirty

@jennyross a couple of thought on this one: Vaillant ASHP monobloc support: If the installer used an existing base, such as a patio, then subsequent...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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