INSTALLER’S GUIDE
Page
5
Suitable flues and minimum flue sizes are as follows: -
a)
225mm x 225mm conventional brick flue.
b)
175mm diameter lined brick or stone flue.
c)
200mm diameter factory made insulated flue manufactured to BS4543.
d)
175mm diameter flue pipe. See BS6461 Part 1 for suitable materials.
e)
A masonry chimney having a correctly installed flexible flue liner with
minimum diameter of 125mm and conforming to BS715.
The minimum effective height of the flue must be 3m.
The flue must not be used for any other appliance or application.
Any chimney damper or restrictor should be removed. If removal is not possible,
they must be secured in the open position.
If the appliance is intended to be installed to a chimney that was previously used for
solid fuel, the flue must be swept clean prior to installation. All flues should be
inspected for soundness and freedom from blockages.
Figure 1. Hearth and Fireplace Opening
