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webcmg
@webcmg
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Joined: Jan 5, 2022
Last seen: Mar 23, 2025
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Topics: 3 / Replies: 104
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RE: High air source heat pump running costs – Vaillant AroTherm Plus

@robl cheers, are you suggesting removing and putting IWI behind the heat exchanger box? Or just around it? Out of interest, where would source insu...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: High air source heat pump running costs – Vaillant AroTherm Plus

@robl thanks for the reply. Your assessment of A, B, C is spot on. The garage isn't completely uninsulated but the loft space insulation can definitel...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: High air source heat pump running costs – Vaillant AroTherm Plus

Thanks, we're in a new build so not planning on replacing showers just yet. How would you approach better insulating this setup? Is the fact the DHW t...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: High air source heat pump running costs – Vaillant AroTherm Plus

Thnks, I would be interested to know what settings you use. Assume it isn't on 'constant' and that it is set for a significant drop off in temp before...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: High air source heat pump running costs – Vaillant AroTherm Plus

Vaillant have made some recommendations on changes to the system, I'm not convinced they'll address the issue and it will be difficult to know until t...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: High air source heat pump running costs – Vaillant AroTherm Plus

Yes, but if the radiators aren't even warm... Then it's unlikely the room will be warm either. Quick update. Vaillant have been investigating, no real...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: High air source heat pump running costs – Vaillant AroTherm Plus

@derek-m It's hard to tell because it's been warmer outside (10 degrees today) and I had to put the heat curve up to 0.9 in order to get any heat in t...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: High air source heat pump running costs – Vaillant AroTherm Plus

Hi @derek-m - the plumber popped over today so was able to get some readings which are as follows: BufferFlow 34Return 31 Radiator circuitFlow 34R...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: High air source heat pump running costs – Vaillant AroTherm Plus

@Derek-M what was the solution to this issue?

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: High air source heat pump running costs – Vaillant AroTherm Plus

No not yet, I don't have the right gear to monitor. Just paying £14 a day currently...:(

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: High air source heat pump running costs – Vaillant AroTherm Plus

I don't have equipment to measure the temperature accurately (plumber did the last readings), but with an infrared laser thermometer I'm getting UFH...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: High air source heat pump running costs – Vaillant AroTherm Plus

@alec-morrow you can see it here. The rads are definitely coming off the bottom two. If switched, won't that mean the UFH is too cold though given the...

3 years ago
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Air Source Heat Pumps (ASHPs)
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