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AllyFish
@allyfish
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Noble Member
Joined: Oct 31, 2022
Last seen: Oct 24, 2025
Profile Activity
Topics: 23 / Replies: 483
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Reply
RE: 17kW Grant Aerona 3 - advice needed for pre-commissioning struggles

Hi @Denevil, OK, the low rate overnight tariff is a good reason to generate HW overnight, if not the most thermally advantageous time. Defrosts are an...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kW Grant Aerona 3 - advice needed for pre-commissioning struggles

Hi @Denevil, just reading this, I'm probably a month or so further on my Grant ASHP system journey, 10kW Aerona3 and 150m2 EPC C house. It's a learnin...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Our Grant Aerona R32 13kW ASHP installation

@marvinator80 for internal pipework, yes. for external, no. Needs to be thicker wall, minimum 19mm (3/4") and weather/water and UV resistant skin. Som...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Massive Electricity Cost

We get very cold weeks like this 4-6 weeks of the year. When I first started researching ASHP, I realised it would be more expensive than kerosene, my...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: British Gas kicks off price war for heat pumps

Quite a bit of coverage over on LinkedIn about this one. And so the race to the bottom begins. Price driven installs seldom hit the required quality a...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Flow temperature & weather compensation. Impact on efficiency

@tim441 this is really useful info and a great find. Your experience of converting from oil to ASHP mirrors mine. I'm only 3 months into the journey h...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Buying a house with an ASHP – what to look out for and what questions to ask?

@derek-m Grant UK in my case. By their own admission, they 'make it easy' for tradesmen used to fitting gas boilers to fit ASHPs. But that does not ma...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Buzzing noise from UFH manifold

Maybe a bit of wear and tear? Bleed the system of air, it's not something you want in the system. I have one TRV that quietly 'sings' when it modulate...

3 years ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Buying a house with an ASHP – what to look out for and what questions to ask?

@abernyte "If it is the manufacturers agents then at least you know it was correctly installed and setup." - you would hope so, but... We've seen mu...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Buzzing noise from UFH manifold

Wow! ASHPs need to deliver more flow than conventional fired boiler heating systems, as they operate a much lower delta T supply and return temperatur...

3 years ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Install a Grant Aerona 13kW instead of Mitsubishi Ecodan 11.2kW?

Hi @kitkad, I have a Grant Aerona 10kW installed since Oct last year. It struggled a little in the December cold snap, mainly due to the time it was s...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: No heat in radiators since heat pump failure

Radiators that are only getting warm at the bottom only sounds like they are full of air. Easy to check that one. Has the Ecodan got either a manual f...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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