8
9
Yes
No
The chimney pot is placed on top of the chimney and helps to expell the smoke.
The fundamental characteristics of the chimneypot are:
•
It must have the same diameter of the chimney flue
•
Useful outlet section not less than twice the minimum of the chimney flue (ex. Chimney flue
section 200 cm2 – total output section holes > 400 cm2)
•
It must prevent, through an appropriate construction, the entrance into the chimney flue of rain
and snow. In very windy areas, it is recommended to install an appropriate chimneypot.
•
It must be insulated, like the chimney flue, until its holes.
•
In case the brick chimney flue has an internal pipe, this pipe shall continue until the holes in the
chimneypot.
•
Avoid the output of two chimneys flues in the same chimneypot. (fig. 2D)
•
If the chimneypot cannot be placed on the ridge of the roof, it should at least be positioned so
as to ensure the dispersion of smoke outside the reflux area, in order to prevent the formation of
back pression in the chimney, which can compromise the exit of the smoke into the atmosphere.
THE CHIMNEY FLUE
The Chimneypot
Fig. 2D
Fig. 2E
Over the ridge
Over the ridge
Reflux area
Reflux area
