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8 FLUES
8.1 Flue Options, Components & Dimensions
The use of any flue system other than that supplied or recommended by the
manufacturer will invalidate the warranty.
The following flue options are available from Warmflow:
FBF Low Level Balanced Flue Kit
HBF High Level Balanced Flue Kit
VBF Vertical Balanced Flue Kit
HFL Horizontal Entry Flue Liner Kit
VFL Vertical Entry Flue Liner Kit
UPMK Utility/Internal Plume Management Kit
KPMK Kabin Pak/External Plume Management Kit
8.1.1 Conventional Flue Guidelines
The flue system should be designed in accordance with local bye-laws and the
Building Regulations. Draught stabilisers are not recommended for oil fired
boilers. Sharp bends or horizontal runs should be avoided and the flue should
terminate 2 feet (600mm) above the ridge of the dwelling. Terminals which restrict
the discharge or allow ingress of water should be avoided.
When connecting to an existing masonry chimney, a Warmflow HFL or VFL
flexible flue liner suitable for use with oil fired condensing boilers and of an
appropriate diameter must be used. The annular space must be filled with non-
combustible insulation and sealed top and bottom.
Only Warmflow flue systems designed specifically for use with oil-fired condensing
boilers may be used.
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