Boiler flue regulations
2021-9-2u2002·u2002A boiler flue needs to be: 300mm away from an openable window, door or air vent. 25mm below guttering, drain pipes or soil pipes. 300mm above ground, roof or balcony level. 2,000mm below a Velux window. 1,200mm from an opening under a carport, such as a door or window, into the home.
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