363.2.3. VENT CONFIGURATION3.2.3.1. LEGEND3.2.3.2. VENT TO BE USE WITH APPLIANCE Flexible ventFor a short distance installation when the fireplace is near the external wall of the house. It must becovered by the 8 feet insulation sleeve include with the appliance.Any installation beyond 8 feet must be do with rigid sections.The Gas Fireplace is approved to use a gas certified aluminum flexible of 4”x7” x 8’ support centered.N.B. You need to buy a 4” male to male connector to install the 4 inch flexible onto fireplace connector. Rigid ventThe rigid direct vent recommend with the gas fireplace are:• Selkirk Direct Temp / gas & pellet 4” x 6-5/8.• DuraVent DirectVent Pro 4” x 6-5/8.The 8 inch insulating sleeve must be installed imperatively on the first 8 inches of air vent.You must put high-temperature sealer between the 6 5/8 inch collar, the rigid vent end and the firstscrewed section on the stove collar.3.2.3.3. CONDITIONS TO BE MET• Total vent length, including elbows (see 3.2.3.3), must not exceed 40 ft. H + V ≤ 40 ft.• The first 8 ft. of vent (from the fireplace) must always be covered with the insulating sleeve providedwith the fireplace; no matter the model or configuration type.• The first 6 in. of vent (from the fireplace) must be vertical.• The horizontal run, including elbow equivalents (see 3.2.3.3), must not exceed 3 times the vertical risewhen it is greater than or equal to 1.33 ft. (16 in.) and less than or equal to 10 ft.H ≤ 3xV only if 1.33 ft. (16 in.) ≤ V ≤ 10 ft.Exception: 6 in. ≤ V ≤ 16 in. Hmax. = 48 in. (4 ft.)• Maximum of 4 elbows for the entire exhaust length.• Minimum of 1 ft. (0.3 m) is required between two vent elbows.• No vent section should have a downward slope.- ≤: less than or equal- ≥: greater than or equal- <: less than- >: greater than- V: vertical rise- H: horizontal run