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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Jan 11, 2026
Profile Activity
Topics: 20 / Replies: 3890
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RE: Cascade 2x Grant Areona 10kw ASHP - Ongoing setup issues

I presume he didnt say why? I dont personally understand how this can be the case (so suspect BS) but of course willing to listen to arguments. &nb...

1 week ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Radiator sizing sanity check

Well that puts a different light on it altogether! Radiators not getting warm would be due to one or more of (a) valve blocked - note that TRV pins...

1 week ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Water Hammer After Heat Pump Install

@jaynieq I wish you luck with this one. I think the main thing I am telling you is to focus (when discussing with any plumber) on the water hammer an...

1 week ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Radiator sizing sanity check

Thats good. Keep the faith, rad swaps are easy and rads are dirt cheap. Even I can do 2.5 a day, I am not a plumber and absolutely detest plumbing!

1 week ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Radiator sizing sanity check

Total and complete madness! Better would have been to leave the upstairs rads, make the downstairs ones bigger if there is room, and drop FT, or just...

1 week ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Grant ASHP 17.5 kw. weather curve

All sounds good and like you know what you are doing. Radiator balancing can be tedious and the poor control that LSVs give really doesn't help. I ha...

1 week ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant ASHP 17.5 kw. weather curve

Firstly welcome to the forums.   I hope you are running your heat pump 24*7 with any TRVs and thermostats set well above the desired temperat...

1 week ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Cascade 2x Grant Areona 10kw ASHP - Ongoing setup issues

(Almost) all heat pumps do defrost by taking heat from the water in the emitters and using that to melt the ice. This causes the flow temperature to ...

1 week ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Optimum new build house design for Heat Pump

From first principles I would say:   Definitely design for a single low flow temperature, not different flow temperatures. Definitely calcu...

1 week ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Cascade 2x Grant Areona 10kw ASHP - Ongoing setup issues

This is actually normal, or at least its more or less what I see with my Vaillant and there is an obvious logical explanation. The heat pump has to w...

1 week ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Radiator sizing sanity check

Reducing radiator size is just plain madness in most cases, whatever the survey may say. You can always turn them down. Why on earth would you waste...

1 week ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Testing new controls/monitoring for Midea Clone ASHP

  @benson very well done for implementing this with such a simple UI. FWIW its functionally similar to what Vaillant heat pumps do if you chan...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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