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MairiA
@mairia
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Joined: Nov 3, 2025
Last seen: Jan 20, 2026
Profile Activity
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?

@transparent yes I'm sure I could do that. I can cut it outside and wear a mask so hopefully no concern about dust. I had a Google about ventilation i...

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 I feel a lot of the information from the installer in their replies has been 'fudge' and doesn't really clarify anything for me, or indic...

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 again really useful, thank you so much. Temperatures tomorrow are forecast for 5-6 degrees during the day, 8 degrees the day after so I'll lo...

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?

@toodles yes I am relying on the Daikin data from the MMI, and have heard before that they are less than reliable. The video you shared gives a really...

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. The unit is a EDLA09DA3V3. Refrigerant is R32. SCOP on the MCS certificate is 3.6, on the heat loss calculation for space heating ...

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'll take a look at those links and see if I can work it out. You might be entertained to know that there are 2 more vents in ...

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 yes it's an air vent. The side wall of the integrated garage there is an external wall. The rear and opposite side walls are shared with ...

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 yes that all makes sense, a really useful plan. I'll cancel the setback now as I see increasingly cold weather forecast, -1 overnight and lig...

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?

Actually I've double checked my current heat curve settings and the LWT seems pretty much correct for the outside temperatures.

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 will do 👍

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 don't see anything that would help me know what pipework goes where. I don't see a water pump anywhere, and actually have a vague memory 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?

@editor thank you, I've checked and did include that question. I'll keep you posted 🙂

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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