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MikeFl
MikeFl
@mikefl
Member
Reputable Member
Joined: Apr 17, 2023
Last seen: Dec 11, 2025
Profile Activity
Topics: 1 / Replies: 125
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Reply
RE: Is the Grant controller a thermostat?

@heat_help Hi. You seem to be saying "flow rate" at some points and "flow temperature" at others? As you probably know, the flow rate on a Grant is fi...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installation queries for Grant Aerona

@jwilliams89 The house is around 150m2, split 110/40 (it's a converted bungalow, which is why the split is so unbalanced). Hence the K3s are downstair...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installation queries for Grant Aerona

@jwilliams89 From my experience, the radiators were sized correctly. I have 5 (I think) large K3s downstairs. One is 84Kg empty, so you need something...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installation queries for Grant Aerona

@allyfish This sounds very positive, although I'm a little sceptical at the moment. I hope they can retrofit these better controls, as the current one...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Holiday mode vs thermostat control

I believe 'holiday mode' achieves the same thing i.e. during the times you mark as holiday, a fixed temp target is set. This tends to be controlled by...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do ASHPs work with poor insulation?

Good that they are discussing EPCs and how they don't favour ASHPs. The whole EPC rating system is a joke at the moment - no training, no standards, ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installation queries for Grant Aerona

@jwilliams89 As someone who's had a Grant installed under ECO4, part of the problem (I suspect) is in the company trying to tick all of the required b...

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

I'd echo what @allyfish said. I too have a 10kW Grant, and about 150m2 to heat. During the cold snap I was consuming 50-60kWh per day, and this didn't...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pumps don't work: debunking myths & misconceptions

@editor I think it's important to focus on "energy used" rather than COP. HP owners tend to focus on COP, which is quite a novel concept for non-HP pe...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Delta T with a Low Loss Header

I've been bending my brain trying to balance my LLH (Grant install one by default these days it seems - I suspect to ease the installer's job from wha...

2 years ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Is the Grant controller a thermostat?

@sentinam Yes. Parameter '21 04'; the temperature at which the HP will be aiming at the high LWT value set in parameter '21 02'. By 'High LWT' I meant...

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

@mab I think most have changed their low end to 0 from -4, I have. I guess once you're at zero, you'll need 'high LWT'. I'm getting the figures from...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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