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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Aug 15, 2025
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Topics: 17 / Replies: 2075
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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)
Reply
RE: Accessing and analysing data from your heat pump

I am familiar with python for basic things but might be inclined to use R for charts, done using cairo_pdf the output can be very neat. But the proble...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: AI Heating Controls & IoT

Thanks @scrchngwsl that and the rest of your post is a very clear description of how a 'learning' system might work. I'm not sure why I put learning i...

3 years ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Rate the quality of your heat pump design and installation

I agree, that's the point I always made, including the second part, ie I knew full well an old leaky building costs more to heat, whatever the fuel. ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: AI Heating Controls & IoT

@mjr - I agree, and said earlier, it does get indirect feedback via the RWT, and yes, I agree, a bigger difference all other things being equal betwee...

3 years ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: The Mystery of the Weather Compensation Curve

This is not necessarily the case. Which uses more energy: keeping my house at 18 degrees all day every day for a week, or heating my house to 18 degre...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: AI Heating Controls & IoT

@editor and @derek-m - there is partial indirect feedback about the indoor temp, in the RWT. As the house warms, the RWT gets warmer, and that's what ...

3 years ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Mitsubishi Ecodan not good enough ?

Small listed semi-detached cottage, original parts from mid 1700s, with later additions. All solid stone walls apart from 1980s addition of one bedroo...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: High air source heat pump running costs – Vaillant AroTherm Plus

See the thread "14kW Midea ASHP in an old leaky building" (<=link), lots of info there. Small old three bed listed cottage, and yes I do have a pla...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Page 149 / 175
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