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MairiA
@mairia
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Joined: Nov 3, 2025
Last seen: Mar 23, 2026
Profile Activity
Topics: 1 / Replies: 45
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?

@editor thought I should give you an update, although there's no resolution as yet. MCS and NAPIT have kept me updated at intervals. Progress is obvio...

3 weeks 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 again for your help with this. Just to update, since I changed the maximum LWT to 60, and reset the curve as you suggested I've onl...

3 weeks 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?

I've now had an interesting email from a Complaints Resolution Specialist at MCS. She is part of a newly formed complaints team, and advises that ''yo...

3 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 think I'll go for 59 at -8, we can get temperatures below -5 on occasion but I would say below -8 is incredibly rare. I'll repor...

3 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 again. Apologies I missed you pointing this out earlier, but it certainly makes sense. My curve is currently set to LWT 25 at OAT 1...

3 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 again. I know using the offset to try to raise the room temperature isn't ideal, but I was desperate! It was one of those times whe...

3 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 I have now been allocated a complaint handler by NAPIT. The email advising me of this states 'In accordance with our formal complaint's proced...

3 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 think you may be right about trying to work on it myself. I feel I get a different opinion from every professional I talk to! Th...

3 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?

Well, no major progress to report as yet. HIES replied ''As design also falls under the remit of NAPIT, we must allow them to continue with your compl...

3 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?

Further update. I did send complaints to HIES and NAPIT. I'm not really clear what the role of NAPIT is over and above that of MCS and HIES, MCS said ...

5 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?

My MP is Dr Zubir Ahmed, Labour, Glasgow South West. And this is the reply from MCS to my follow up query about the original heat loss calculation a...

5 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?

That's certainly what it feels like. It did seem when I was filling in their online form that I was being steered towards contacting HIES instead so I...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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