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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: Aira Heat Pump: Stylish Scandinavian Heating

No data sheets or produce literature yet, but a very glossy product launch. It's a branded Vaillant product, so it should be good. I'm not a great fan...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Interesting article - flexible TOU tariffs, BESS and heat pumps
2 years ago
Forum
Energy Storage
Replies: 2
Views: 1529
Reply
RE: Refrigerant in Daikin Altherma HHT taking hours to heatup

That's revealing. The house may be super insulated, but typically a Victorian property would have solid walls and non-insulated floors. Do you know mu...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Refrigerant in Daikin Altherma HHT taking hours to heatup

Depends on the heat loss of your house and how warm you are wanting it. Defrost can effectively de-rate a heat pump's output capacity if the time take...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Refrigerant in Daikin Altherma HHT taking hours to heatup

@signorjim delta T flow and return of 10degC is quite high for an ASHP. At 10degC delta T and 17l/min flow it's theoretically giving out 10x4.2x(17/60...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Refrigerant in Daikin Altherma HHT taking hours to heatup

Hi @signorjim, the slow rise in leaving water temperature from your ASHP [I presume you mean, rather than refrigerant temperature], may be due to the ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Maximising Savings: Navigating My First Year with Octopus Energy and Heat Pump Running Costs

Agree, heating oil prices vary short-term seasonally, and longer-term with the cost of a barrel of oil. We found we could always purchase it for less ...

2 years ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Maximising Savings: Navigating My First Year with Octopus Energy and Heat Pump Running Costs

@steve81uk and @toodles, we're all on a similar journey here. Perhaps to a lesser or greater extent of data acquisition, analysis and statistical geek...

2 years ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Issues with 6.5kWh Growatt battery – Shinephone app says system is offline

@graemed well done! Will you be issuing an invoice to your installer at your standard charge-out rate +VAT on the same payment terms they had with you...

2 years ago
Forum
Energy Storage
Topic
Drax - the environmental catastrophe providing 5% of the UK's power
2 years ago
Forum
Wood Burners, Biomass, Small Scale, Biofuels & Other Heating Alternatives
Replies: 4
Views: 1618
Reply
RE: How do I choose a single room MVHR to prevent losing heat in my bathroom ?

@heat-pump-newbie most dehumidifiers are free-standing, so you need to be a little careful with 240V in bathrooms and where you locate it. Most can be...

2 years ago
Forum
Insulation
Reply
RE: The weakest link; components of an installation team.

I think this is far too common. A mixed bag with me, both from the same renewable installer. ASHP install pretty good, the plumbing team were exceptio...

2 years ago
Forum
Well & Truly Off The Grid
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