Wood Stove Single Wall Pipe Clearance

For close clearance installations or mobile home installations use double wall stove pipe.

Wood stove single wall pipe clearance.

Single wall stove pipe radiates more heat into the room than double wall stove pipe and requires 18 clearance from combustible surfaces where double wall stove pipe requires only 6 from walls and 8 from ceilings when used horizontally. Use single wall black stove pipe from your stove to a thimble or ceiling transition box never inside a combustible wall or inside a chimney chase. Double wall stovepipe is used when you don t have 18 or more clearance from combustibles. If the stove legs provide less than 6 inches of clearance 2 to 4 inches of hollow masonry laid to pro vide air circulation with a sheet of 24 gage sheet metal between the floor and the masonry is recommended.

When required clearance with no protection is 36 inches a 3 1 2 inch thick masonry wall with ventilated air space used as a wall protector reduces clearance by maximum of 66 percent to 12 inches from the combustible wall. The nfpa calls for an 18 clearance to combustible walls for single wall stove pipe. Eight to ten inch legs will provide more air space and. The ideal flue pipe assembly is one that rises straight up from the appliance flue collar and directly into the chimney with no elbows.

Once these clearances are met you must convert your stove pipe to class a chimney pipe for proper venting of your stove. Double walled or close clearance stove pipe is used to connect your stove to the chimney. When combining lengths remember to subtract 1 5 from each to account for overlap. The minimum clearance may be reduced by 50 percent to 225 mm 9 in if suitable shielding is installed either on the pipe or on the combustible surface.

A straight up single wall flue pipe assembly. For example a single wall stove pipe requires 18 inches of clearance from ceilings or walls. For single wall stovepipe the clearance space remains 18 inches. An 18 inch clearance to combustibles is required and these pipes feature an unheard of fume free finish.

Most of the double wall stove pipe allows for 6 clearance from wall combustibles and 8 from ceiling combustibles. This pipe has a clearance of only 6 to combustible materials and keeps flue gases warm for better draft.