A1 Flues
A1 Flues

Chimney draught stabilisers

A chimney draught stabiliser is a device fitted to a commercial flue system to control the draught of the system to a specific level. They are essential as a stable draught is important to ensure optimal combustion – irrespective of whether you use oil, gas or other solid fuels.

They comprise a counterweight and a pivoted blade that opens under the difference in pressure on each side of the blade to allow diluted air to enter the flue system.

The introduction of the colder air reduces the flue gas temperature and the flue system’s natural buoyancy; it also increases the flue gas mass flow and the flue system flow resistance to a point where the system’s operating pressure is maintained at around the specific value.

In commercial chimney systems, the stabiliser is set up with a draught gauge and by adjusting the counterweight by trial and error. This is done at the boiler commissioning stage by the boiler commissioning engineer.

The features of our chimney draught stabilisers include:

  • All stainless steel
  • Corrosion resistant
  • Easy to install
  • Low maintenance
  • Suitable for oil and gas boilers – and condensing boilers
  • Meet single- or multi-burner requirements
  • Ex-stock delivery
  • Special sizes quickly made to order

For technical help on chimney draught stabilisers, either email our Technical Department at technical@a1flues.co.uk or call 01623 867303.