Sections of vent can be combined. Manuals have length parameters for a variety of applications. The dimpled end of the vent components fit over the fireplace vent collar. Featuring positive twist lock connections. Effective length will be 1-1/2” shorter.

SV4.5L12 venting component is used on some Astria, Superior, and Lennox gas burning direct vent fireplaces. Check your model's Installation Manual for listed Secure Vent Components.