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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: 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: 1333
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
Reply
RE: How do I choose a single room MVHR to prevent losing heat in my bathroom ?

Ah. in that case, as Derek says, a dehumidifier is your best best. They are good for drying clothes and towels in a very cost effective way, as well a...

2 years ago
Forum
Insulation
Reply
RE: How do I choose a single room MVHR to prevent losing heat in my bathroom ?

Hi @heat-pump-newbie, you might find the capital cost of a small MVHR room to recover heat from the bathroom extract isn't financially viable. General...

2 years ago
Forum
Insulation
Reply
RE: Compare Octopus tariffs using own real world data

@toodles thanks for your experience and information. It's really helped me. I've just taken the 'plunge' with Agile, having been on Cosy for a year. C...

2 years ago
Forum
Electricity, Tariffs, Monitoring & Providers
Page 14 / 42
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