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AllyFish
@allyfish
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Joined: Oct 31, 2022
Last seen: Jun 18, 2025
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Topics: 22 / Replies: 468
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RE: 17kw Grant Aerona heat pump not performing

It's a lot better than HIVE, which was cycling 5+ times per hour with me! Just leave it set to a high temperature and use climate/weather compensation...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 17kw Grant Aerona heat pump not performing

@sirpatchuk1980 ASHPs work best when continuously running. Less wear and tear and better efficiency. The outdoor unit has in built stop/start cycle pr...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

@sirpatchuk1980 (sorry @aceshigh) just chipping in. Looks like your Grant controller is hidden away with some of the pipework and system components. I...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

Hello @sirpatchuk1980, welcome. Lots of useful info on here on how to maximise efficiency of ASHPs, especially retrofits. First things first, a bit of...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Combustion Source Heat Pump?

Grant do their Vortex oil boiler as a hybrid - basically an outdoor vortex combustion boiler plonked on the same base as one of their (well, Chofu's) ...

2 years ago
Forum
Wood Burners, Biomass, Small Scale, Biofuels & Other Heating Alternatives
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RE: Is it good an additional insulation of the compressor?

Hermetic refrigeration compressors are suction gas cooled, using sub-cooling of the refrigerant vapour. For most ASHPs, the compressor compartment is ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Combustion Source Heat Pump?

That's interesting, but OFTEC is the oil fired technical association, and one can't help but feel this sounds like self-preservation? If there's adequ...

2 years ago
Forum
Wood Burners, Biomass, Small Scale, Biofuels & Other Heating Alternatives
Reply
RE: Wallpaper

@cathoderay quite! It does rather complicate hanging a picture, etc. I'm hoping the system runs at SELV, but maybe not.

2 years ago
Forum
Wood Burners, Biomass, Small Scale, Biofuels & Other Heating Alternatives
Reply
RE: Combustion Source Heat Pump?

I like the thinking outside the box. Air source heat pumps are designed to take enthalpy (the energy state of outside air) at fairly low levels, trans...

2 years ago
Forum
Wood Burners, Biomass, Small Scale, Biofuels & Other Heating Alternatives
Reply
RE: 17kw Grant Aerona heat pump not performing

The Grant low loss header is a decent bit of kit, but Grant bizarrely don't put flow monitoring and adjustment gauge on primary and secondary circuits...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

@soniks I think they are sometimes not wired up on the Grant installs. Mine was, but I recall the installer saying he was not supposed to enable it us...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Does our solar generation sound about right?

@lfranklin used to divert excess solar PV generation into a system hot water tank via the 3kW immersion. About £350-400. Friends with them have said t...

2 years ago
Forum
Solar Photovoltaic (PV)
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