7G51 Zero Clearance KitChimney Routes1) This fireplace must be vented with a 8" (200mm)diameter Class “B” vent. The installation of the ventingsystem must conform and be in accordance with thenatural gas installation code CAN/CGA - B149(Canada), ANSI Z223.1 (U.S.A.), AG 601 (Australia),and NZS 5261 (New Zealand). Minimum chimneyheight from base of fireplace must be at least 12 feet(3.7m).INSTALLATION2) Masonry Chimney Installation:This application can be connected to a masonrychimney flue. Make sure the masonry chimney isclean and in good working order. When an existingmasonry chimney is unlined and local experienceindicates that gas condensation may be a problem orif local codes dictate, an approved liner should beinstalled. Use “B” Vent to bridge the gap between thefireplace and the masonry chimney. To ensure properflue sizing and operation it is recommended that themasonry chimney be lined with an approved aluminiumchimney liner of the same diameter as the “B” Vent.Make sure connection between “B” Vent and masonryis completely sealed. Flue pipe exposed to cold airshould be insulated in a chase. If condensationoccurs, a trap should be installed at bottom of flue.VENTING