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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 5, 2025
Profile Activity
Topics: 17 / Replies: 2676
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RE: Getting the best out of a heat pump - is Homely a possible answer?

Funny how simpler is often better. I have settled on running my heating 24*7 at same temp no setback, bedrooms slightly cooler than living rooms (by ...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Samsung heat pump sizing

@johnnyb very much in tune with the thoughts above and would advise against oversizing. The problem may be if you want the BUS grant as that require...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Commencing on an ASHP Installation Process

I think those are pretty much the standard figures that used to be quoted in mis3005-d (which now instead references a BS EN standard that I have yet ...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Load Compensation and Weather Compensation

I think that maybe what the adia thermal system does, but as you say it's quite expensive and only works with some ashps Alternatively perhaps someo...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Load Compensation and Weather Compensation

Still not quite. As I read this the body adjusts for fixed flow when on (based on an adjustment made by the installer according to a table that doesn...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Load Compensation and Weather Compensation

Er - that description you posted says that the trv shuts off the flow when the room is at the set temperature, which is also what seems to happen in p...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Load Compensation and Weather Compensation

That's good to know - and in which case, adding anything fancy to the system to "automate" it sounds like (a) an unnecessary complication; and (b) lik...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Load Compensation and Weather Compensation

Is that really the case? Won’t the rate of heat loss in the room change as it cools/warms outside and thus what it is balanced for today at 1c isn’t ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Load Compensation and Weather Compensation

Almost but not quite a trv with remote sensor. A trv with or without a remote sensor operates principally, so far as I know, as an on off device (alb...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Load Compensation and Weather Compensation

As I understand it these balance for fixed dT That's not what's needed unless emitters are perfectly sized (which they inevitably aren't). What's n...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Load Compensation and Weather Compensation

In the context of a single zone heat pump system a valve that self balances very slowly for equal (or set) temperature would avoid the need to adjust ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How accurate was your heat loss survey?

For me: Two full surveys (each taking 3hrs, one of which cost me £300) got to 16kW. Correcting for obvious errors in the surveys got to 10.5kW. Meas...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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