Shielding protects nearby combustible surfaces, but the stove, flue pipe and insulated pipe have different clearance requirements. Start with your exact model and installation type; a shield does not reduce every clearance.
Scope: This guide covers non-certified recreational setups using the Cub CB-1000 and Grizzly CB-2000. Our stoves are not approved for residential installation. Speak with your insurer before purchasing or installing and check local requirements.
Stove clearance and mounting
Keep at least 14 inches at the sides and 16 inches at the front without shielding, and at least 40 inches from the stove top to the ceiling or other surface above. The underside must always be shielded. Where a side surface is closer than 14 inches, use the appropriate side shield. Select a floor mount with a rear heat shield when the back of the stove is within 14 inches of the wall behind it.
Choose the mount and shields for your exact stove. Follow their installation instructions for permitted reductions and spacing. Do not apply a flue-pipe clearance reduction to the overhead surface: the 40-inch stove-top requirement remains.
3-inch flue pipe: 9 inches or 3 inches
For a non-certified setup, maintain 9 inches between the outside surface of the 3-inch pipe and the combustible surface without shielding. Proper flue shielding can reduce this to 3 inches. These measurements start at the pipe surface, not its centerline. The shielding must cover the entire pipe run alongside the wall; add compatible flue shield extensions where the mount’s shielding does not cover the full run.
5-inch insulated pipe: a separate requirement
The 5-inch insulated pipe must remain at least 30 inches from the stove so it is not heated directly by the stove body. It normally starts 2 inches below the interior ceiling. Do not extend it excessively down toward the stove. Keep the 1-inch airspace to combustible material at the roof and ceiling opening, following the exit-kit instructions.
For non-certified setups, the 3-inch pipe terminates 12 inches above the roof peak or highest point. The 5-inch pipe terminates 10.5 inches above it, which is 1.5 inches below the 3-inch pipe. The 3-inch pipe runs continuously inside the 5-inch insulated pipe and is purchased separately.
Certified installations use different rules
The safety-certified Cub CB-1008 and Grizzly CB-1210 have separate installation requirements. Maintain 18 inches from the outside surface of the 3-inch pipe to combustible surfaces. Shielding does not reduce this requirement in Canada. In the U.S., retain 18 inches unless applicable requirements and the authority expressly permit a reduction. Follow the certified manual and its listed chimney requirements; the non-certified 5-inch roof exit kit is not the certified chimney system.
Plan the complete setup
Read the instructions for your exact model and accessories. For a non-certified setup, use Build Your Order to plan compatible components. If you cannot achieve the required clearances, change the installation position and contact us before ordering.