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cathodeRay
cathodeRay
@cathoderay
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Illustrious Member
Joined: Feb 28, 2022
Last seen: Sep 12, 2025
Profile Activity
Topics: 17 / Replies: 2131
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RE: Getting the best out of a heat pump - is Homely a possible answer?

Thanks for your input. I note your last remark, which is presumably why you have more of an on/off pattern. I also note the chart is 0 -100% ie it is ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Our year end review - North East Scotland

Another valuable source of weather data is the Met Office's WOW website: You have to sign up (free) but then you get access to very detailed loca...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Getting the best out of a heat pump - is Homely a possible answer?

@derek - this is a very interesting idea, but I fear there may be other drawbacks as well, given the addition of an indoor thermistor in serial with t...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Getting the best out of a heat pump - is Homely a possible answer?

@batalto - I've also made some possible progress on the modbus/RS-485 monitoring (which I gather is also what Homely uses, hence looking into it as a ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Getting the best out of a heat pump - is Homely a possible answer?

Point taken, but my hardware, as in the plumbing etc, is pretty much where it is, with the only possible variation being removal of the PHE, which I a...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Getting the best out of a heat pump - is Homely a possible answer?
3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 392
Views: 41186
Reply
RE: ASHP at cold temperatures

Kev - your room temp line looks suspiciously straight to me. It is almost a perfect flat line, with a minute wobble at about 0830. My room temp measur...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP at cold temperatures

That's what I thought, it's the heat pump that 'inverts' to become a fridge, and uses the warm exhaust gas from the fridge to do the defrosting (put l...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP at cold temperatures

Good point about GSHPs. It would still be interesting to know how other countries deal with ASHP frosting. Maybe they adopt @batalto's solution, choos...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP at cold temperatures

Correct, I was going to include that but it complicated the post more than I wanted, and furthermore at -5 and below the main problem is the heat pump...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP at cold temperatures

Installers understandably enough tend to have favoured brands, familiarity and all that, but a good one will readily consider another brand if it is m...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP at cold temperatures

24-26 degrees is a very high medical requirement. The evidence is far from perfect, but the findings suggest a minimum of 18 degrees, even for older p...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Page 153 / 179
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