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AllyFish
@allyfish
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Noble Member
Joined: Oct 31, 2022
Last seen: Nov 8, 2025
Profile Activity
Topics: 23 / Replies: 489
AllTopicsReplies
Reply
RE: Seal the Deal: Don't Let Your Heat Pump Leak Energy

Weekend upgrade, Primary Pro done properly, unlike my installer’s attempt. Less heating the street hopefully 😉

9 months ago
Forum
Insulation
Reply
RE: Widespread failure of insulation installation

@jamespa it's seldom adequately understood even by us [so-called] engineering professionals. There was an excellent series of articles published in th...

10 months ago
Forum
Insulation
Reply
RE: Widespread failure of insulation installation

I think there's a sector of the energy efficiency retrofit industry that is well meaning, but simply incompetent. There are two passive retrofit measu...

10 months ago
Forum
Insulation
Reply
RE: Antifreeze corrosive to copper pipe rubber rings?

Hi there, and welcome @wyf. Glycol might not be compatible with all compression fittings that use rubber or neoprene sealing systems. Needs checking. ...

10 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Insulating brass fittings in Loft

I would insulate them, and any other valves bodies and buffer thank bulkhead fittings, etc. not currently insulated. You can't really over-insulate pi...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona3 R32 HPIDI17 performance in low temperatures

Hello @davidm06, Grant 10kW owner here. We experience the same, the Grant Aerona R32 is a defrost-happy unit, one which will defrost every 40-50 minut...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant Arotherm ASHP gets noisier when it gets colder outside

@jamespa it's a good find, thank you. Some inaccuracies however, including the assumption that split air source heat pumps have the compressor inside ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant Arotherm ASHP gets noisier when it gets colder outside

Our 10kW Grant Aerona also gets noticeably louder when cold. There's a few reasons why: 1. The ASHP is working very hard, the compressor frequency i...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Advice please on optimising Grant Aerona R32 17 kW

Hi @steam-powered, @mikefl makes good points above, especially balancing the low loss header if you have one. If you don't have any flow setting or mo...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Outcome for 2024 - with Agile, ASHP, PV, Batteries, EV

Our 2024 year end summary: 1992 EPC C house (76%) 155m2. 10kW ASHP primary CH & DHW, 5kW wood stove secondary heating for colder winter evening us...

10 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: MCS heat pump pre-sale information and performance calculation

Rubbish in = rubbish out.EPCs are not reliable with too many assumptions at the discretion of the energy assessor. I downloaded the MCS 031 system p...

11 months ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: Raising product standards for space heating

A big 'hmmm' from me. 😉 The elephant in the sitting room is not the efficiency and rated performance of heat pumps when tested to BS EN 14511 or BS...

11 months ago
Forum
Government Schemes, Regulations, Planning & Organisations
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