Schiedel BVENT


  • Gas appliances up to 60kW input
  • 100-150mm internal diameter
  • Flue boxes and chimney system to fit gas fires in rooms without a conventional chimney
  • Residential applications
Int Ø mm 100 125 150
Ext Ø mm 127 152 178


  • Twist-lock bayonet jointing system.
  • No locking bands required.
  • Aluminium inner liner and aluzink outer case which can be painted if required.
  • 12.5 mm air gap between case and liner keep case temperature low.
  • 0-90° adjustable bend.
  • When joint is made, the liner covers the jointing collar, shielding it and permitting easy drain-down of any moisture in the flue.

Technical Specification

B Vent is available in 100, 125 and 150mm internal diameters. the flue size must be as recommended by the appliance manufacturer and must not be reduced, and never smaller than the appliance spigot.

This information is provided as a guide only, and for exact flue sizing recommendations, refer to appliance manufacturer’s installation instructions and design guide.

Gas Central Heating Boiler (Wall hung/Freestanding)
Input up to 25kW
Input 25kW-40kW
Input 40kW-60kW
Gas Fires
Inset to BS 7977-1
Backboiler to BS 7977-2
Gas Water Heaters
Input up to 25kW
Input 25kW -55kW
Input 55kW -60kW
Gas Stove/Cooker – (AGA/Rayburn/Stanley etc.)
Gas Flue Blocks
Connection IN
Connection OUT
Gas Warm Air Unit
Input up to 18kW
Input 18kW-35kW
Input 35kW-60kW

* When the fire has been tested and relaxed to 125° the appliance manufacturer should be consulted.


Twin wall gas heating system designed for cost-effective venting of residential and small commercial atmospheric gas appliances with input up to 60kw. It is suitable for both internal and external use, either as a complete system or in combination with masonry, i.e. brick chimneys.
Note that BS 5440-1 requires the use of a stainless steel insulated flue on external runs exceeding 3 metres.


B Vent Brochure

B Vent Brochure

3.03 MB

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