MCZ Forma 75 dx [14/40] External air inlet

B B

MIN.1,5 m MIN.1,5 m

MIN.1,5 m

MIN.0,3 m

4-FLUE

EXTERNAL AIR INLET

It is mandatory to provide an adequate external air intake that supplies the combustion air required for the product to work properly. The

ow of air between the outside and the installation room may be direct, through an inlet in an external wall of the room; or indirect, via

air intake from adjoining rooms and connecting permanently with the installation room (see Figure 9 b). Adjoining areas may not include

sleeping areas, garages or general areas with a re hazard. During installation one must check the minimum clearances required for air

intake from outside. Take into account the presence of doors and windows that could interfere with the proper ow of air to the product

(see diagram below).

The air intake must have a minimum total net area of 150 cm2 (for replaces/inserts - 100 cm2 for stoves): the surface must be increased

accordingly if within the room there are other active generators (for example: electric fan for stale air extraction, kitchen hood, other

stoves, etc...), which could cause depression in the room. One must verify that, with all the equipment on, the pressure drop between the

room and the outside does not exceed a value of 4 Pa. If necessary increase the intake section of the air inlet, which must be made at oor

level and always protected with a bird-proof outer protection grid and in such a way that it cannot be obstructed by any object.

One can connect the air required for combustion directly to the external air inlet, with a non-compressible pipe (e.g. spiral). For air ducts

up to 3 m, increase the cross-section by approximately 5%, longer ducts increase it by 15%.

FIGURE 9 a - directly from outside

FIGURE 10

FIGURE 9 b - indirectly from the adjacent room

A=AIR INLET

B=ROOM TO BE VENTILATED

C=INCREASE OF THE GAP UNDER THE DOOR