Continental Fireplaces CB30-1 Manuel D'installation Et D'opération page 11

venting requirements
EN
16" (40.6cm)
minimum
40 ft (12m)
Maximum
3 ft (1m)
minimum
20"
(50.8cm)
Max.
24 3/16" (61.4cm)
minimum plus rise *
24 3/16"
(61.4cm)
REAR VENT
* See "venting" section
11
W415-2754 / B / 12.09.20