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AllyFish
@allyfish
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Joined: Oct 31, 2022
Last seen: Sep 11, 2025
Profile Activity
Topics: 23 / Replies: 472
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RE: Solar Diverter and faulty immersion thermostat = Accidental Sauna ***SERIOUS PROBLEM****

Immersion heater built-in thermostats are not that accurate. Mine is set to 65degC and cuts out when used with a solar PV diverter. However, the tank ...

2 years ago
Forum
Solar Thermal & Power Diverters
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RE: Is the Grant controller a thermostat?

@dodgyknee Yes, I'm wondering, well, hoping, that the homely interface is retrofittable to the Aerona3. The Aerona3 uses RS485 so fingers crossed. I w...

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

We were off mains gas and on oil, so wanted to get rid as the oil boiler was life expired. No regrets about going all-renewable, solar PV+battery and ...

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

@roamingbull it's a lot of faff and trial and error. Partly that's because Grant install dumb systems with no intelligence and rather clunky external ...

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

Hi @roamingbull. Another Grant unit 'commissioned' without WC enabled? There's definitely a pattern here. Grant are still coming out of the dark ages ...

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

This is a common problem, and the Chofu/Grant ASHP unit seems to frost up very quickly. I have my thoughts why, and that's simply because it's not des...

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

@daveb Hi Dave, weather compensation is a must - and Grant should be enabling it on every MCS install. There's evidence from multiple Grant ASHP users...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New Build - Grant Aerona3 10kW - Questions and observations

@ggw Hi there. I'm in heating too with my 10kW Grant Aerona. I'll share some info and hope not to tread on any of this forum Stalwarts' toes.... You...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Areona 17kw questions/concerns

@daniel 55degC is your HW max storage temp. That makes sense as Grant ASHP can provide up to 60degC. 50degC is the system heating design temp. A touch...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Areona 17kw questions/concerns

@daniel nothing wrong with the pics of the outdoor unit. Grant say 'over 300mm' clearance to the wall behind the coil inlet face. Yours looks a little...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Areona 17kw questions/concerns

@daniel nothing wrong with those parameters for HW generation. 4degC over flow and return is about what I see. ASHP is pulling quite a high power in H...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Areona 17kw questions/concerns

Hi @daniel, if you can share some info & answer a few questions I'm sure people will try to help & share experience with Grant installs. 17k...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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