Chimney Cowl; Outside Air Intake; Requirements Of The Boiler Room; Boiler Room Dimensions - Bio Bronpi CARLOTA-MF Instructions D'installation, D'utilisation Et D'entretien

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 (see drawing D11).
(1) Industrial chimney of
prefabricated elements
that allow a good smoke
extraction.
D11
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 or thermo-stove, 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.
It must be placed so that it cannot be obstructed. It must be connected to the environment where the equipment is installed and it must be
protected by a grate. The minimum area of the outlet should not be less than 100 cm2.
When the air flow comes through openings that are connected to the exterior of adjacent environments, it is important to avoid air intakes in
connection with garages, kitchens, toilets, etc.
The boiler or thermo-stove is provided with a necessary air intake for the combustion on the back side (60 or 80 mm diameter depending on
the models). It is important that this intake is not blocked and to respect the recommended distances to the wall or near items.
It is recommended to connect the primary air intake of the boiler or thermo-stove with the outside although it is not obligatory. The connection
tube material can be made in any material (PVC, aluminium, polyethylene, etc.), not necessarily metallic. Consider that inside this duct is
going to pass air at the outside temperature.
6.5.

REQUIREMENTS OF THE BOILER ROOM

• Boiler protection
See point "Installation Safety Rules".
•

Boiler room dimensions

According to the law it is necessary to consider:
- Thermal installations must be perfectly accessible in every part in order to make possible to do all the maintenance, surveillance and
driving operations without any danger.
- The minimum height will be 2.50 m, with a minimal free height over the boiler of 0.50 m.
- There will be a distance of; at least, 0.50 m around the boiler that allows the access to the burner without removing the door and 0.70
m. between the smoke exit and the wall of the room.
- The free space in the front side will be the same to the depth of the boiler, with a minimum of 1 m. In this area, a minimum free height of
2 m must be respected.
INSTALLATION, OPERATING AND SERVICING INSTRUCTIONS
D10
(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.
37 THERMO-STOVES AND BOILERS WITH AUTOMATIC CLEANING
(3) Chimney with interior cone
smoke baffle-plate.