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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 21, 2025
Profile Activity
Topics: 17 / Replies: 2698
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RE: In the middle of an ASHP installation - a few questions (and issues)

OK that rules this one out. Good! Hmm. Fundamentally of course this is down to emitter size/house loss. I'm getting the feeling from your text...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: In the middle of an ASHP installation - a few questions (and issues)

Sorry to hear of your problems, I have two key questions: Just to confirm what you are saying - is this what you experience (that it wont achieve ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: help sizing rads based on room by room heat loss

If its 1988W at DT 50, which is how most radiators are specified (but note not all, one brand is specified at DT70!) then yes that's right. At FT40 a...

4 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: Career change – entering the world of heating and heat pumps

This is probably obvious (and applies to many spheres) but don't believe anything anybody tells you unless either they can explain it or you can under...

4 months ago
Forum
Introductions, Forum Rules & Updates
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RE: Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW

If you dont mind can I ask the reasoning - only about the S vs Y bit, the rest of what you say I fully understand. I should preface this by saying ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW

... presumably because the customer (very sensibly) said that they didn't want a buffer! Why do heat pump installers persist in making things compli...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

I agree. The fundamental is that the house determines the heat loss and the compressor determines the minimum output. Changing the transport mechan...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: The Great British Heat Pump Quiz

I paid my fiver and enjoyed the random questions I got. How do you get the certificate (I passed)

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: help sizing rads based on room by room heat loss

The living/lounge and kitchen in your list aren't dissimilar to mine and were, for me, by far the most difficult rooms to find radiators for. I ended...

4 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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