Appendix 8 Volume Three Schedule 3 – Stack Requirements: Small-scale Fuel Burning Appliances (Gas, Oil and Other Liquid Fuels) The discharge into air from any device installed after 9 June 2016 (including any pellet burner that complies with AQ2A (AQr.26)) must be via an emission stack to the outside atmosphere such that the discharge point at the end of the stack is above the roof of the building, and: (a) be at least 500mm from the nearest part of the roof; and (b) in the case of a trafficable roof designed for personal or public use, be at least 2m above roof level and 500mm above any surrounding parapet; and (c) in the case of a chimney, be at least 200mm above the top of the chimney, be at least 1m horizontally from a neighbouring structure, or if less than 1m from that structure, at least 500mm above it; and (d) be at least 1.5m for any opening into a buildings; and (e) be at least 200mm from another stack. Schedule 4 – Stack Requirements: Stationary Internal Combustion Appliances The discharge into air from any stationary internal combustion appliance must, after the date of notification of this plan, be via an emission stack where: (a) the discharge point it at least 3m above ground level; or (b) the discharge point is 2.5m higher than the apex of any building, tree, slope or other structure within a radius of 2.5 times the stack height (whichever discharge point a) or b) is the higher; and (c) the exhaust gases are directed vertically into air and the exhaust gases are not impeded by any obstruction that would lower the velocity of the exhaust gases. App 8 - 2