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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

Thanks, will have a go at getting this set up. Hope it works with the installation here.

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

@colin thanks, what are you using to monitor the temp of the tank and produce the graph?

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

@colin one thing I have noticed is that we have a secondary return on the hot water circuit. It has a timer which activates a pump to circulate the wa...

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

Interesting, I'd like to get to the bottom of the efficency because we're seeing high usage for DHW and heating which is why I started this thread. I ...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Vaillant Arotherm Plus issues - circulation, efficiency and performance

@saz any updates? We have the same HP and have similar issues with efficiency and comfort.

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

@colin Hi Colin, we've certainly reduced our Kwh usage for the hot water based on the settings. We now currently use between 3-4 Kwh per day to heat 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

Does that cycle use the immersion heater?

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

A couple of pictures, the first is the inside of the heat exchanger box. The polystyrene seems to insulate well and is a tight fit. The second ...

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

@colin my cylinder boost offset was 25k, so you know what this actually means?

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

@colin thank you, does your cylinder definitely hit the required temperature?

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

@colin hi Colin, any chance you can share your anti legionnela settings? System used 8kwh on this cycle last night and temperature is only reading 48 ...

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, I was thinking of IWI on the entire room. The water to 46 deg and averages about 4kwh over the last few days. What are you doing with the exce...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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