Chimney Cowl; Outside Air Intake - BOREAL HYDROBOREAL-14 Instructions D'installation, D'utilisation Et D'entretien

Drawing shows the basic requirements for the chimney installation of a boiler:
The flue must be away from flammable or combustible materials through an appropriate insulation or an air chamber. Inside it, it is forbidden the pipes of
installations or air abduction channels. It is also prohibited to do mobile or fixed openings for connecting other different equipments.
EN
The lack of sealing of the connection may cause the malfunction of the equipment.
In drawing you can see the requirements for a correct installation.
6.3.

CHIMNEY COWL

The chimney draw also depends on the chimney cowl. Therefore, in case of an artisanal chimney cowl, it is indispensable that the exit section is twice
the inside section of the smoke duct. The smoke discharge will be assured even in the presence of wind.
(1) Industrial chimney of
prefabricated elements
that allow a good smoke
extraction.
The chimney cowl must comply with the following requirements:
• It must have the same interior section of the chimney.
• It must have a usable exit section that is twice the one of the interior of the chimney.
• It must be constructed so that the rain, snow or any other objet do not enter inside and the smoke evacuation is assured even with air in any
direction and inclination.
• It must be easily accessible in order to do servicing and cleaning tasks.
• It must be placed in a position that guarantees the correct dispersion and dilution of combustion products outside the reflux area where
backpressures may occur. The size and form of this area will be different depending on the inclination angle of the chimney cowl fins, this is why
it is necessary to respect the minimal heights.
6.4.

OUTSIDE AIR INTAKE

For the proper operation of the boiler, it is essential that there is enough air for the combustion and re-oxygenation of the environment where it is installed.
This means that the air must be able to move for the combustion through some openings connected to the exterior, even when doors and windows are
closed.
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Minimum height 5m
Minimum height 5m
(2) Traditional chimney. The proper
exit section must be, at least, two
times the interior section of the
chimney. The best is 2.5 times.
(3) Chimney with interior cone
smoke baffle-plate.