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Uk_pete_2000
@uk_pete_2000
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Estimable Member
Joined: Nov 11, 2024
Last seen: Apr 4, 2025
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Topics: 1 / Replies: 72
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

@heatgeek It's very much passive house and at 538m², with 1300kwh heating (as taken from a meter just for the HP). That works out at less than 2.5...

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

@heatgeek Thank you, yes this is quite a meal and I'll try to understand each part. --- "efficiently use such a large HP to directly heat yo...

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Yes we have about 300m² on two manifolds, 16 loops. Another manifold is for upstairs rads

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant Aerona3 with Octopus Cosy tariff

Sorry I think you lost the point. The main question was about the CH turning off when DHW was being called for. So having two HP, that person can h...

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant Aerona3 with Octopus Cosy tariff

Some where, someone said they had two HP. with this setup and some changes to the pipes, you could have one HP deal with DHW and CH and the other one ...

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

I enjoyed reading this response, it so follows our house, but we have different results. Our house is 538m² and built to Passive standards and w...

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant Aerona3 with Octopus Cosy tariff

I just looking into those myself. From what I gather you just put a wire between the two contacts to turn it on. You could use a Grant EP001 (edit sho...

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant Aerona3 with Octopus Cosy tariff

Thank you for that, on those HP that have this facility then setback will work. The Grant doesn't have this, but it may be included in the new contr...

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

@grantmethestrength thank you for this information.

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant Aerona3 with Octopus Cosy tariff

Why have you put it in here? If its used all the time then fine, that's where it should be. But its the coldest room then the rest of the house will...

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant Aerona3 with Octopus Cosy tariff

You have to take into account what the actual house temp is. If at 16.00 your house is at set temp, then any setback by 1° will turn off the HP. Th...

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant Aerona3 with Octopus Cosy tariff

It all depends on your house and how long it take to lose heat. If you can turn your HP at 16.00 and it only loses say 1/2 ° by 19.00 hrs then that ...

3 months ago
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Air Source Heat Pumps (ASHPs)
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