Quote for 7kw Vaillant - surely not enough?

[Gone West]

1 hour ago, markc said:

I have just had 3 stand alone air to air (heat and cooling) units fitted for £4500.00 that’s for the 3 fully installed and they did a fantastic job.

If you don't mind me asking, what make are the units and did you have to do any work at all when having them fitted.

[markc]

1 hour ago, Gone West said:

If you don't mind me asking, what make are the units and did you have to do any work at all when having them fitted.

They are Carrier units, I should have provided local rotary isolators but couldn’t do it before they started so agreed an extra £200 for them to sort it.