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MairiA
@mairia
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Joined: Nov 3, 2025
Last seen: Jan 20, 2026
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Topics: 1 / Replies: 43
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

Thank you to everyone who has commented on this. I decided to initially send a Subject Access Request to the installer to see whether having sight of ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

@transparent apologies I missed your post. This is a photo of the cylinder.

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

@jamespa thank you, I'll start recording these, I can see them on the Onecta App. In the heat loss document it gives LWT range 35-50C, minimum ambient...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

@dgclimatecontrol thank you 🙂

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

@editor thank you. Can I ask who actually issues the MCS installation certificates? I assumed MCS, but given my experience now wonder if it's the inst...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

@jamespa I'm pretty reluctant to go back to the installer for this. I think any goodwill from them has evaporated. And my feeling latterly was that th...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

Would it be reasonable to expect the installer to meet the cost of an alternative provider to carry out a new heat loss calculation and assess the set...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

@transparent thank you, I will add that to my to do list. Have you any thoughts what I might hope for as an outcome if the unit installed is actually ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

@toodles good to know. I really dislike the MMI. I find it very awkward to use, have to go in to my garage to take readings and adjust settings, don't...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

@toodles that's a really useful thought, I will check them

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

And I'll contact MCS, I didn't realise they would have a copy of the heat loss document. Also can I say thank you so much to all have responded so hel...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

@editor for the benefit of others, the company involved is Flo Renewables in Glasgow. I should say I was very happy with the initial installation proc...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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