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AllyFish
@allyfish
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Noble Member
Joined: Oct 31, 2022
Last seen: Dec 18, 2025
Profile Activity
Topics: 23 / Replies: 494
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RE: Ecodan unable to hit legionella target temp - what's the consensus?

The built-in thermostats on most immersion heaters are very approximate. They are more of a safety thermostat than a control device. Mine is maxed out...

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan unable to hit legionella target temp - what's the consensus?

There's a lot of misconceptions about legionella and 60degC. Similarly a lot of misunderstanding about how a stratified [non-mixing] domestic hot wate...

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: One Year Review: Grant 13kW ASHP - A Catalogue of Errors

Welcome @solenoid. I have a Grant Aerona R32 10kW ASHP. The ASHP itself has been uber-reliable, it has never really missed a beat. The Chofu [built in...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A2A vs A2W: Which Heat Pump Would You Pick?

I have voted for air to air on the basis of a future 'hypothetical' new house largely open plan living spaces, with multi-split systems including bedr...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 13kW Aerona3 - issues getting zones to temp

Thermal contraction of the radiator as it cools? Aluminium has approximately twice the thermal expansion coefficient of steel.

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 13kW Aerona3 - issues getting zones to temp

Really puzzling @crimson. I have a 'text book' Appendix B Grant 10kW Aerona install scheme with secondary pump, 4 port low loss header, all original 2...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 13kW Aerona3 - issues getting zones to temp

@Crimon, but the Grant Aerona R32 range has fixed speed pumps with 1,2 or 3 configurable speeds? Coupled with the previously blackened flow setter you...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is Your House Warmer Upstairs Than Downstairs?

Hi @grahamf, yes, exactly this. Unless you live in a house with all internal doors closed, high levels on insulation between downstairs and upstairs, ...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Tomato Energy

So the tomato has gone splat then? No surprise.

2 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
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RE: Flexi-Orb Heat Pump Scheme: A Game-Changer for the UK's Heat Pump Industry

The Government DESNZ response to the Boiler Upgrade Scheme Certification Requirements consultation has been published. The MCS will retain their ...

2 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
Reply
RE: Solar Power Output – Let’s Compare Generation Figures

2025 - now a record year of Solar PV Generation. October 30th any our Solar PV generation has exceeded 3740kWh, our previous yearly record in 2023 for...

2 months ago
Forum
Solar Photovoltaic (PV)
Reply
RE: The Hidden Secret to a Successful Heat Pump: Pipe Size Matters

Hi @colinc. Your concerns are well-founded. At least you can make a well-informed decision either way. The laws of physics and thermodynamics can't be...

3 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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