We have a flue pipe exiting the kitchen wall ,but under a lean to?

Question

it is 550mm from the ceiling and 650 from the edge where it is open to the garden ( no obstructions, ) and air circulates. a corgi engineer checked it out and passed it, saying it was fine and that we had co alarms fitted also. but the owner is worried about rergulations, it's a 3 walled lean to with a perspex roof, there is a window 500mm away from the flue. ( u.k)

Answer 1

its likely to be ok, but really depends on the type of flue (fanned or natural draught).  the link to the current UK regulations document is:

http://www.planningportal.gov.uk/uploads...

have a look at the picture on page 42 of the document and then the distances for different appliance on page 43 and check the distance are ok.  most modern boilers are fanned draught balanced flue, so 300mm from a window and at least 200mm below the roof would be fine