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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Sep 18, 2025
Profile Activity
Topics: 17 / Replies: 2150
AllTopicsReplies
Reply
RE: A Beginner's Guide to ASHP Monitoring

I saw those Bellflowsystems units and had the same thought - they look identical, apart from the colour. Sometimes the 'development' is the other way,...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A Beginner's Guide to ASHP Monitoring

Not getting very far with the clamp on (non-invasive) affordable flow meter. The best I have come up with is an ebay listing from China: I haven'...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Looking for reference sites and installer recommendations

Somehow I managed to screw up the x-axis in the second chart in the post above - here is the chart with the correct x-axis labels (can't edit the prev...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A Beginner's Guide to ASHP Monitoring

@batalto - they are invasive meters, and very pricey. The electricity in (in kWh) I can do from the blinking LED on my ASHP dedicated meter, the flow/...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Looking for reference sites and installer recommendations

Don't forget people are heat sources. If you had a number of house guests, you had a number of mobile radiators/convectors... Estimates vary as to how...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Looking for reference sites and installer recommendations

Empirical heat loss assessments, done of a cold design temp day, tend to get sniffed at these days, but in fact I think it may be one of the most accu...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A Beginner's Guide to ASHP Monitoring

Thanks @robl, that's all very helpful. I have also been googling away, and it appears there are clamp on ultrasound flow meters, which solves the inte...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A Beginner's Guide to ASHP Monitoring

For the record, I have just across this interesting page on flow rates, which also has a very useful flow rate calculator at the bottom for both water...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A Beginner's Guide to ASHP Monitoring

@robl - thanks for the details. £8 per sensor is affordable, but given more standard flow meters cost hundreds of pounds, I would want to be sure the ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A Beginner's Guide to ASHP Monitoring

Thank you all for your comments. A significant amount of my time is very pertinent, I have already spent many hours on this, which I am happy to do (i...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A Beginner's Guide to ASHP Monitoring

Thank you all very much for your input. I think I am approaching the point where I am ready to start getting some hardware, and starting some monito...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Rate the quality of your heat pump design and installation

I've just tried temporarily increasing the warm end of the weather comp curve by ten degrees. Flow rate effectively remained unchanged, at 1.41 to 1.4...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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