5 | Technical Data
EN
Operating manual Folding corner fireplace inserts
26
The following points are to be observed for exterior air conduits:
• do not create a bend, as the cross-section will be reduced
• keep cross-section constant
• The free air passage at the air grille must not be less than the actual cross-section of the recom-
mended external air duct
• there must be no negative pressure (suction) at the point of the air duct intake, even in unfavour-
able wind conditions