5
In any case, make sure that the length of the initial vertical part of the flue pipe is at least 1.5 meters. Proper exhaust of
flue gases is guaranteed in this way only.
Figure 7
AISI 316 steel flue with double insulated chamber, material
resistant to 400 ° C. Optimal efficiency 100%
Waterproof flue with double insulated chamber and outer
casing of light concrete. Optimal efficiency 100%
Traditional clay flue with indents. Optimal efficiency 80%
Do not use flue pipes with rectangular cross section with
ratio different from the plan. Efficiency of modest 40%
