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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Sep 14, 2025
Profile Activity
Topics: 17 / Replies: 2843
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RE: Simulation of ASHP with Gas boiler as part of decision process

Precisely that. The method is based on BS something or other, I forget which, so even MCS can say it's someone else's. BS something or other is des...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

Absolutely, with one caveat, if you have a condensing boiler which condenses all the time, ie is set up properly to run at low flow temp, then the los...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

I think the planning inspector probably came to the same conclusion, but obviously he had to express it in legal terms! In fact mine could possibly ...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

In fairness a year of my 2 year journey is the planning nightmare, during which I suspended looking for installers. I havent yet reached 20 installer...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

@ianmk13 Where are you located? With this info maybe someone here can provide.a recommendation Sadly the industry appears to be riddled with gr...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Antifreeze Valves

Do they dump all the water or do they just drip slowly? I thought it was the former but the altenic video suggests the latter. It seems to me this ...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: British Gas versus Octopus: Two possible heat pump routes - how to evaluate them?

Problem best dealt with onsite imho. The onsite plumber will almost certainly be happy to leave you the new rad and knock off an hour early.

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

This is an area where the industry tendency to oversize can cause a real problem. I decided to start rad upgrades in advance so far for half of the ...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

Better insulation is best but of course bigger radiators may also be necessary to get tropical room temperature with low flow temperature. That's par...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 6 Red Flags to Avoid When Considering a Heat Pump Installation

My ashp journey is only 3 years old and in that time it's clear that thinking has matured quite significantly, albeit by no means universally. I can ...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

I did pretty much the same. The overall conclusion for me is that low and slow makes for a more comfortable living environment and it confirmed that ...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

Thanks for confirming that the industry knew what it was doing (wrong). I guess it was just too easy to whack in an oversized boiler, turn it up to ...

12 months ago
Forum
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