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

@soniks, so sorry to read this. All ASHPs in the UK at the moment will be routinely cycling into defrost. The compressor switches off and the system r...

3 years ago
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RE: Massive Electricity Cost

@lucgw you are welcome. Many of us are learning as we go. I can't help but notice there's no pipework insulation on any of that Grant install. Is the ...

3 years ago
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RE: Massive Electricity Cost

@lucgw Hi there, I'm relatively new to ASHP with a 10kW Grant Aerona3 ASHP and 250L pre-plumbed grant cylinder. I'm sitting at around 32-36kWh per day...

3 years ago
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RE: What's your current daily damage?

140m2 and heated background circa 18degC daytime 16degC night time. Grant Aerona3 on 24/7. Currently about 24kWh per day for heating and DHW (45degC s...

3 years ago
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RE: -5c this weekend – what's your heat pump strategy?

Weather Compensation set to OEM standard, and ASHP left running 24/7. First really cold test for the Grant Aerona 10kW. -4degC air = +45degC water. A ...

3 years ago
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RE: Did anyone else's ASHP spend most of yesterday (Mon 21/11/22) in defrost?

@editor Freezing fog seems to be an ASHP's nemesis. When similar weather is forecast I'll pop downstairs, light the log burner first thing and switch ...

3 years ago
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RE: Need help explaining how my ASHP heats home vs. water

Hi Emma, check what your house thermostat is doing set at 16/17degC. Is it switching the ASHP on and off continuously? If it is that's a very ineffici...

3 years ago
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RE: Rate the quality of your heat pump design and installation

@knukes Hi, thanks for sharing. The Grant weather compensation parameters are quite straight forward to adjust once you get into the settings in the l...

3 years ago
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RE: Not having a good time with my Daikin ASHPs (yes, plural)

Hi Chris, there's some fantastically experienced and knowledgeable ASHP people here, you've come to a good place for help. As others have said, based ...

3 years ago
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