Stuv 21 - Page 17

6. C0MBUSTION
STU
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V 21 | MODEL SPECIFICATIONS
PAGE 17
When operating with an open fire, the Stûv 21 consumes a large amount of air. Therefore, we recommend
providing an external air supply, although this is not mandatory.
A sufficient air inlet must be created under the stove, at the front. When not using the air intake box with
connected duct, the base of the fire must be supplied with fresh air. The fresh air must come from a ventilated
empty space, a ventilated room or from outside the house (mandatory for passive/air tight buildings).
ONLY DUCT THE FRESH AIR INLET TO THE APLLIANCE USING THE INTAKE BOX.
The air intake, which varies depending on the model, should ideally be located beneath the front of the unit
and incorporate a shut-off register (fig a).
Ideally the fresh air inlet would be fitted with a closure valve (fig e and f) to prevent the room from becoming
cold when the appliance is not in use. It should ideally be located as close as possible to the outside wall and
controlled from inside the room.
a. COMBUSTION AIR CIRCULATION b. COMBUSTION AIR INLET c. COMBUSTION AIR INLET WITH DUCTED INTAKE BOX
d. COMBUSTION AIR INTAKE BOX (Double-sided fires x 2) e. EXTERNAL COMBUSTION AIR INTAKE f. EXTERNAL COMBUSTION AIR INTAKE