Thanks for your reply, it was def 100cm x 100cm that is on the form. He then cancelled mums home care.
10,000 cm2 would be enough ventialtion for all the boilers in the street, most likely.
If it was 100mm x 100mm then the cupboard door has much more than this, it has a vent at the top and the bottom of that door, and the kitchen back door has a vent bigger than 100mm x 100mm, I def feel he was a mofo.
It sounds like your mom either had a clown who didn't have clue, or a cowboy that was quite willing to rip granny off.
Registered letter to MD of BG asking to clarify this might give the whole story a happy ending.
A phonecall to GSR monday morning, requesting an inspection, might also be a good idea.
This is so far off the mark that I would have to see it to believe it, no disrespect to you.