Outdoor Boiler Stack Height Above Roof

This specification makes sure steep roof slopes are cleared.

Outdoor boiler stack height above roof.

If a new owb is subject to a valid nuisance complaint the dec may require that the permanent stack extend up to two feet above the peak of any roof structure within 150 feet of the owb click here for more info. Provide a stack velocity of a minimum of 1 4 times the wind velocity. It s 6 inches in many states but especially in northern states like minnesota it s 12 inches. Place the stack at least 10 ft high on most roofs to avoid recirculation.

Ipc 904 1 does not give a minimum height for stack vent termination above a roof it just says at least number inches mm the minimum termination height for a plumbing stack vent varies by state. Provide ample stack height a minimum of 10 ft above adjacent rooflines or air intakes. The top of the chimney should be at least 3 ft 0 92 m above the roof surface. All new owbs must be equipped with a permanent stack extending a minimum of 18 feet above ground level.

Place stack downwind of air intakes. For 18 feet of run you would have a rise of 72 inches. Owb s should be utilized only in rural settings. Requiring a stack height of x feet above any structure within a 50 to 200 radius creates a very real liability issue.

Minimum stack height requirements for outdoor wood burners owb s. Place the stack as far from the intake as possible 50 ft is recommended. This started out as a question but found my own answer. Vertical blue line along the left side of the chimney in our photo.

For gas vents or a type l vent this distance above the roof surface must be at least 2 ft 0 61m.