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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Sep 13, 2025
Profile Activity
Topics: 17 / Replies: 2842
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RE: In the middle of an ASHP installation - a few questions

On the grounds that an installation other than by an MCS contractor doesn't qualify for the BUS grant and isn't permitted development then its clearly...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Undersized Vaillant ASHP and abandoned by installer

Ps to the above. The requirements on the heat pump, for the grant, are specified here. The relevant ones are, I think, the below. Ther...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Undersized Vaillant ASHP and abandoned by installer

Hi Jonathan The Vaillant report you posted and as I read it says you have a radiator in the kitchen, and also says you are running at a flow temp of...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Suitability of 45C flow temp with existing pipework

That's all very neat! If the 2*15 run in a straight line to the room next door to the right of the photo, and then the microbore tees off to the firs...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Suitability of 45C flow temp with existing pipework

The problem is you need to know what the existing pipework is, which by the sounds of it you cant without taking up some floorboards. Then the questi...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: The good, the bad and the not that great – my heat pump installation

Unfortunately MCS is funded and run by the industry. He who pays the piper and all that. My overwhelming impression, sadly, is that their guiding p...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Undersized Vaillant ASHP and abandoned by installer

@jonathan Obviously this should be resolved for you by your supplier. However if it isn't for some reason it isn't, I wouldn't be too despondent. ...

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

Fair enough. They must have factored in an allowance for gas boiler efficiency. Definitely, which is why I favour using multiple metho...

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

Fair enough. They must have factored in an allowance for gas boiler efficiency. Definitely, which is why I favour using multiple metho...

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

I agree that this is not a particularly attractive method. However that doesn't justify relying on a method with known failings and ignoring other...

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

As you can see there is furious disagreement (or healthy debate) going on, so I would suggest you read what everyone is saying and make an assessment ...

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

er.. just like the spreadsheet method! Hence why I am arguing for the consumption to be used as a sense check at least! er - just like an insta...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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