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Crimson
@crimson
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Joined: Jan 16, 2024
Last seen: Oct 23, 2025
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Topics: 4 / Replies: 229
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Something I'll try to monitor is when the ASHP runs, the temp it's actually running at.I just checked now and it's on. It's 10C outside, and it's ru...

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

I believe this is in reference to what they originally designed which was as an example: A Stelrad Concord Lo-line 296x1600 v A Eskimo 200x1694 ...

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

Thanks Toodles, this is the ongoing back and forth unfortunately with the builder, plumber and now heat specialist. According to the builder the heat...

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

Hi both, the rads heat when the ASHP runs, I don't believe there's any issue there, this was something the heat specialist checked (bled, check TRVs o...

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

Well I'm now currently stuck in a who's liable for installing the buffer tank for this install / myself querying is this 100% going to rectify the iss...

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

Not posted for a little while as been busy with other things. I've kept the system on Grant's default WC settings. It's been mostly quite mild so h...

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

I believe it’s all been balanced. Chap said they’re all filling up well once got air out system. Other half has moaned it’s now too warm so dropping...

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

Heat specialist came yesterday. Initial impression was downstairs rads seemed physically small. And by comparison felt upstairs was oversized. Ov...

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

Starting to see that even though downstairs calls for heat, when other zones don’t the ASHP turns off due to equal temp in and out. Soon as I upped un...

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

I'm going with: 2102 - 40C 2103 - 35C That's around 38C at 7C outside. This morning, combined with a bit too much of a drop for upstairs aft...

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

Oh definately. The house proportionally the said downstairs zone is also the largest, with 2 rooms equal to underfloor zone. I think the hall and land...

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

Changing the secondary pump to speed 1/3 seems to have had quite an impact. Downstairs can hit 21c consistently. However effectively almost running 24...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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