Notifications

Clear all

Is this ASHP install OK?

Air Source Heat Pumps (ASHPs)

Last Post by ASHP-BOBBA 3 weeks ago

3 Posts

3 Users

1 Reactions

92 Views

RSS

El3b

(@el3b)

New Member Member

Joined: 3 weeks ago

Posts: 1

Topic starter 26/06/2025 4:25 pm

I had this ASHP installed in April. It failed the Trust Mark inspection because it was installed on uneven ground/edging and was not level front to back.

A man from the company has been out since and I believe he put a bit of broken up breeze block under one of the feet to level it out and put more soil on top.

The photos show the result.

For context the edging is concreted in, which is why they've just smashed it up and put feet on top. The soil area used to be a flower bed and To my knowledge no groundwork/weed membrane or anything was used. Just a little bit of new gravel was scattered around the condensation outlet (which had already frosted over with mineralisation, hopefully this is normal).

To be honest I was expecting they'd lay a concrete slab, but maybe I was expecting too much?

Anyway, I'm worried they're going to get me to sign to say I'm happy with it...and I don't think I am. Should I be? Is this normal/acceptable?

I also don't really understand why it's level in the middle (side to side) but not at the edges, I guess the unit must be bowed in the centre as the drip tray is not level.

I'm hoping trust mark come back out. Does anyone know if they do?

Thanks in advance for any advice.

This topic was modified 3 weeks ago by Mars

Quote

Topic Tags

Mars

(@editor)

Illustrious Member Admin

Joined: 4 years ago

Posts: 3357

26/06/2025 4:41 pm

Can you please post some photos? What you've described doesn't sound great.

Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb

Subscribe and follow our Homeowners’ Q&A heat pump podcast

ReplyQuote

ASHP-BOBBA

(@ashp-bobba)

Reputable Member Member

Joined: 7 months ago

Posts: 192

27/06/2025 8:38 pm

@el3b Hi, sorry to hear that, it is advisable to install the system level to allow it to function correctly and to prevent unwanted noise vibration or ware on the components.

I have attached 2 types of plinth we usually ask for or provide to the external units, this allows minimal vibration, a level and sturdy hard standing and good soak-away for the condensate.

Mitsubishi PUZ-WM60-112VAA_YAA Plinth measurments.pdf

Mitsubishi Ecodan simple soak-away plinth.pdf

Professional installer. Book a one-to-one consultation for pre- and post-installation advice, troubleshooting and system optimisation.

🤩

ReplyQuote