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Simonwhiteley
@simonwhiteley
Member
Eminent Member
Joined: Jan 5, 2025
Last seen: Feb 4, 2025
Profile Activity
Topics: 2 / Replies: 15
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Reply
RE: R290 install location and future of R32

I don’t think it is a specific legal requirement- other than to be safe. And there is a risk. My point is to take a more balanced view of risks. See...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: R290 install location and future of R32

R290 could be a HP show stopper for me. Seems to me we need some acceptable risk mitigations in some circumstances, other than just moving the unit fu...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Can you work an ASHP too hard?

Thank you. PfB is one of my go-to guys but I hadn’t seen that. My situation is quite similar to the one described: visual intrusion and noise limits a...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How much radiator capacity do I need for an air source heat pump?

Follow-up: it occurs to me that the difference between flow and return temperatures is potentially a good indicator of whether you have enough radiato...

8 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Can you work an ASHP too hard?

Interesting, thank you. The marine diesel analogy was on my mind. At the other end is a F1 engine needing to be rebuilt after every race. You would th...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Can you work an ASHP too hard?

Thank you. I definitely plan a full flush. The pipework is 40 years old, but we have been here since 1988 and never had problems eg with balancing or ...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Can you work an ASHP too hard?

@judith that method is great isn’t it! Except I have about 6 different consumption based estimates using that approach going back to 2016. And two spo...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Can you work an ASHP too hard?

Thank you, my hunch is it is just old school plumbing as you suggest. The logic of a backup/auxiliary is that it is additional when required- not a ta...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Can you work an ASHP too hard?

@johnr thanks, great minds etc. if the backup ends up being used too much, by fallback is to add an air to air with three internal units in the key ro...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Can you work an ASHP too hard?
8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 19
Views: 1440
Reply
RE: How much radiator capacity do I need for an air source heat pump?

@jamespa also: I assume the fan radiator has a lower water volume? We are looking at a simple one zone, no TRVs, no buffer/volumiser system, so need e...

8 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: How much radiator capacity do I need for an air source heat pump?

thanks both. I think that calculation gives a lower heat output by about 20% than the HG rule of thumb table I linked above. As he is the one guarante...

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