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batalto
@batalto
Member
Noble Member
Joined: Apr 9, 2021
Last seen: Nov 3, 2025
Profile Activity
Topics: 24 / Replies: 1068
AllTopicsReplies
Reply
RE: Measuring your COP

@derek-m we already have 200mm of rockwool between the floors. It's more just an issue that the top of the house is super insulated so hangs onto heat...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

@derek-m thanks for that - as an FYI our heat loss is 8774w and our emitters are 12,115w in power From this, on the coldest day of winter we would u...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

@derek-m below is the 90th percentile coldest day where I live. Its very mild here as we are on the coast and I imagine this would have a big effect o...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

@derek-m I do have a calculated heat loss with room by room radiators - would this be useful in your scenario? Our primary living is in one room (12m ...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

@derek-m looks like it works. As an FYI you can use the formula FORECAST in Excel to estimate a data point from available data e.g. off number tempera...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

As an FYI this is the temperature range where I live - as you can see we are mild pretty much the whole year, with the odd cold day. The coldest point...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

@derek-m there is definitely some kind of issue with the file - wont open for me either

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

@derek-m that's amazing. Thank you! As an FYI I already copied most of that COP and temperature data into Excel, if that helps?

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

I've just found a whole section on heat pumps for Nest thermostats - quite interesting!

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

@morgan

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

@derek-m I've emailed the guy who installed the system to ask

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Measuring your COP

@derek-m I would assume it controls both, as there is little point running the ASHP and not the central heating pump and vice versa. The Nest will cal...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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