2 Flue and Ventilation

Note: Detailed recommendations for flues are given in thecurrent issue of BS5440 Part 1.
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2.1 Terminal Position

AAFGEAGGGB,CB,CFFKKKCGLL The minimum acceptable siting dimensions for the terminal from obstructions, other terminals and ventilation openings are shown in diagram 2.1.The terminal must be exposed to the external air, the positionallowing free passage of air across it at all times.Car ports or similar extensions of a roof only, or a roof and onewall, require special consideration with respect to any openings, doors, vents or windows under the roof. Care is required to protect the roof if it is made of plastic sheeting. If the car port consists of a roof and two or more walls, seek advice from the local gas company before installing the boiler.If the terminal is fitted within 600mm below plastic guttering orpainted soffit an aluminium shield 1500mm long should be fitted immediately beneath the guttering or eaves. If the terminal is fitted within 450mm below painted eaves or a painted gutter, an aluminium shield 750mm long should be fitted immediately beneath the guttering or eaves.
M Under Car Port etc.H,IJDFK MINIMUMSPACINGin mm MINIMUM SITING DIMENSIONSFOR FANNED FLUETERMINALS POSITION

2.2 Terminal Guard

A terminal guard is required if persons could come into contact with the terminal or the terminal could be subject to damage.If a terminal guard is required, it must be positioned to providea minimum of 50mm clearance from any part of the terminal and be central over the terminal.A suitable guard, reference Type “K3”, can be obtained from:-Tower Flue Components LtdMorley Road Tonbridge Kent. TN9 1RA ADIRECTLY BELOW, ABOVE ORHORIZONTALLY TO AN OPENING, AIR BRICK, OPENING WINDOWS, AIR VENT OR ANY OTHERVENTILATION OPENING.300BBELOW GUTTER, DRAIN/SOIL PIPE75CBELOW EAVES200 DBELOW A BALCONY OR CAR PORT200EFROM VERTICAL DRAIN PIPES ANDSOIL PIPES75FFROM EXTERNAL CORNERS300GABOVE ADJACENT GROUND ORBALCONY LEVEL300HFROM A SURFACE FACING THETERMINAL600IFACING TERMINALS1200JFROM OPENING (DOOR/WINDOW) INCAR PORT INTO DWELLING1200KVERTICAL FROM A TERMINAL1500LHORIZONTALLY FROM A TERMINAL300MFROM INTERNAL CORNERS25
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Diagram 2.1

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