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Crimson
@crimson
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Joined: Jan 16, 2024
Last seen: Nov 25, 2025
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Topics: 4 / Replies: 300
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Thanks @JamesPa, I think the external volumiser suggestion - supposed to be insulated - was on assumption no space inside but yesterday’s visit it was...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

I’ll check which version the Grant is, suspect like you thats what the specialist is seeing - that there’s no requirement. Antifreeze valves the ins...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

  @jamespa - the Grant ASHP isn’t being replaced, the 13Kw will remain, apologies if I wasn’t clear. The heat specialist was experimenting with...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Thanks both. I’d forgot to detail that pump speeds either side of the LLH (Grant one and one in pump room). A lot of experimenting with different sp...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Thanks @jamespa, I think over the almost 3 years we’ve attempted running all zones (Ive spent many hours with settings, balancing rads, closing off ...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

It’s been a while since last gave an update…   After a couple visits from a heat specialist, and revisits to the calcs. It’s been concluded t...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: What is a considered a decent weather curve for running weather compensation?

So with a flow temp maxing at 42C, managed to get living rooms to almost 21C at points in the day. 44C started to overheat one of the rooms so some g...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: What is a considered a decent weather curve?

Thanks Gary, I'll do that with the Drayton balancing key. I know the plumbers turned down the actual lock shield a bit as well so combined should rea...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: What is a considered a decent weather curve?

Thanks Gary, I'll then look at killing off the setback to see if can run it lower (I say it switches off, I have the hallway panel it go down from 23C...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

I've created a separate thread to discuss WC settings as feel that's a more specific topic. Still waiting on installers to come and sort that airloc...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
What is considered a decent weather curve for running weather compensation?
12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 5
Views: 863
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Yeah, I’m just concerned that the design of the system is 40C at -3C ambient, if I keep pushing up percentage wise I’m getting quite above that and wo...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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