Majestic LINK-DV30B is a direct vent gas insert kit. Direct vent gas inserts typically use co-linear (side by side) 3" diameter, flex liners that connect to the insert and run up through your chimney to the cap. A direct vent insert kit is required when installing your DV gas insert such as the Trilliant, Ruby and Jasper Series. The LINK-DV30B liner kit includes 2 - 3" flex liners that extend to 30 ft., round stainless steel termination cap and flashing.
If your installation does allow for 2 - 30 ft lengths (recommended), the LINKSQB-DV30 (Square Black termination cap) and LINKSQC-DV30 (Square Copper termination cap) are also available.
Because of chimney age or cleanliness, your installation may not allow enough space for two 30 ft. lengths. In this case, Majestic offers two kits that each include one 30 ft. and one 4 ft. flex liner (LINK-DV4-30B - round stainless steel termination cap or LINKSQB-DV4-30 - square black termination cap). BUT, this type of installation may be more susceptible to cold air infiltration and the effects of negative pressure on the appliance's performance.