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AllyFish
@allyfish
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Noble Member
Joined: Oct 31, 2022
Last seen: Oct 20, 2025
Profile Activity
Topics: 23 / Replies: 479
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Reply
RE: Grant ASHP - flow temp on display often nonsensical

Hi @crimson, I think field 2 is compressor discharge temperature, field 0 is return water temp, 9 is leaving water temp. Check the Grant installation ...

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

Yes, this! Thermal mass is key. Ancient civilisations knew a thing or two about using solar reflecting lighter buildings, natural ventilation for cool...

11 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: ASHP + UFH, no circulation pump

@pie_eater I don't know the Daikin Madoka product, but having had a quick look on-line, it seems it's a simple binary [digital on/off] thermostat comp...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona Cutting Out. Hot Water fine.

Great to know you've made good progress @martyj76, and ruled the pump out. The two port valve could well be faulty, it might be a fault with the valve...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP + UFH, no circulation pump

@pie_eater different manufacturers have differing accuracies of COP data, some are just considering the refrigeration compressor, some are total unit ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP + UFH, no circulation pump

Beware the OEM COP 'vanity data' - most if not all heat pump controllers give very flattering [for flattering read exaggerated] COP data. True measure...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Bad COP? Long Pipe Run on Cosy6 Saga Continues.

With the ASHP installed in a neighbouring street it's going to struggle with heat loss & hydraulic resistance. Clearly no-one had done any proper ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is the Grant controller a thermostat?

Hi there @bajj, you've cracked it I think with setting parameter 21 41 to 2degC. UFH will have a very slow hysteresis response as the mass of the floo...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona Cutting Out. Hot Water fine.

This is strange @martyj76, if the unit was installed by a Grant G1 installer, and has been annually serviced by a Grant G1 service engineer, it will b...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Who's your electricity provider and what's your tariff?

E.ON has launched their Cosy Octopus copy tariff product, 'E.ON Next Pumped' with 2x3hr low rate periods, 4am-7am & 1pm-4pm, just like the origina...

12 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: How to make me regret installing a heat pump

@wanttobegreen sure, 2x6.5kW. Which gives a useable storage capacity of about 12kW. For the majority of the winter we can charge 9kW into the batterie...

12 months ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: Oh Dear NESTA!

Andy's assertion that anyone with batteries can power their home in a storm [implying they can draw from the batteries when the grid is out] betrays h...

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