Changed two vents for a customer today on an exterior wall. Boiler was in a cupboard on the other side of the wall. Two vents on the interior wall.
The old vents were obviously built into the brickwork when the house was built (1960's), brown plastic ones.
Gritish Bas apparently told the client that he had to have the vents changed as the existing ones were not suitable. If not, they would cut off his gas supply. They wanted £200 to do the job.
Customer bought the vents they specified, white plastic ones of a well known brand name that I can't recall.
Broke out the old vents, enlarged the openings very slightly & replaced the vents, hour and a half, £55. Doddle of a job.
The old vents had a sticker specifying a free air area of 19.5 sq ins, the new BG specified ones were 21.5 sq ins.
Are Gritish Bas having a laugh here - or more likely tucking up the punter something chronic?