The internal diameter of the chimney shall be min. 150 mm (inside dim.) in
steel chimneys and min.175-180 mm in brick chimneys or chimneys made of
ceramic units as their inside surface will frequently be rough and will offer
resistance.
All joints and connecting points shall, of course, be tight, and the chimney shall
provide a draught of min. 1.2 mm water head (12 Pa).
Register
If your chimney has a register, this should have a forced opening of min. 20
cm
2
.
Assembly of Smoke Turn Plate
The illustration below shows how to place the smoke turn plate when viewing a
section in the fireplace insert from the side.
The smoke turn plate is removed by lifting at one side after which it will come
clear of the other side and be taken down into the combustion chamber and out
through the door. Similarly, it is put in place by moving it up askew at one side
and then at the other side, and it is then put in place in the middle.
Combustion Air Supply
A good and clean combustion will benefit from an adequate supply of air to the
fire. To allow for this, it is, however, a condition that air be supplied to the
room in which the fireplace insert has been put up.
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