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Key to figure 30:
[1]
200mm below eaves and 75mm below gutters, pipe and drains.
[2]
The dimension below eaves, gutters, pipes and drains can be
reduced to 25mm, as long as the flue terminal is extended by
100mm past any overhang. The telescopic flue joint must be
sealed with suitable silicone sealant if it is external to the building.
[3]
300mm adjacent to a boundary line, unless it will cause a
nuisance. BS 5440: Part 1 recommends that care is taken when
siting terminal in relation to surfaces or boundary lines.
[4]
1,200mm separation measured between terminals facing each
other.
[5]
600mm distance to a surface or boundary line facing a terminal,
unless it will cause a nuisance. BS 5440: Part 1 recommends that
care is taken when siting terminal in relation to surfaces or
boundary lines.
[6]
The terminal must be at least 1,500mm from the opening or vent
when sited below the window or 600mm when sited to either side
or above.
[7]
600mm diagonally to an opening door, air vent or opening
window.
[8]
1,200mm separation measured between a vertical flue and a
horizontal flue terminal.
[9]
For the purpose of determining suitable flue terminal positions for
gas appliances, the boundary can be considered to extend to the
centre line of any adjacent routes or waterways e.g. paths,
streets, rights of way, canals, rivers or railways.
[10] 300mm to an internal or external corner. 300mm above a
surface, such as the ground/ floor level or roof surface.
* If the terminal section is less than 150mm and has two screws
securing it to the elbow, the terminal section will not require a
supporting bracket.
[11] 300mm above, below and either side of an opening door, air vent
or opening window.
[12] Below ground level in an open lightwell. The flue must be at least
600mm from the opposing surface and have at least 300mm
clearance either side and below. The flue terminal must be no
more than 1,000mm from the top of the lightwell.
[13] Proximity of flue duct outlet to boundaries, 2,000mm distance to
an opening in adjacent building facing a terminal. BS 5440: Part
1 recommends that care is taken when siting terminal in relation
to boundary lines.
[14] 300mm from an opening or vented window, 150mm to a fixed
unvented window.
[15] The dimension below eaves, balconies and car ports can be
reduced to 25mm, as long as the flue terminal is extended to clear
any overhang. The telescopic flue joint of the terminal must be
sealed with suitable silicon sealant if it is external to the building.
[16] 300mm Horizontally from a terminal on the same wall.
[17] 1500mm Vertically from a terminal on the same wall.
Note:
▶ Installations in car ports are not recommended.
▶ The flue cannot be lower than 1,000mm from the top of a light well
due to the build up of combustion products.
▶ Dimensions from a flue terminal to a fanned air inlet to be determined
by the ventilation equipment manufacturer.
▶ A flue terminal guard shall be fitted whenever a terminal or air inlet is
fitted less than 2,000mm above ground, above a balcony or above a
flat roof to which people have access.
Greenstar 1000 – 6721835943 (2023/08)
Pre-Installation
23
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