Outdoor Boiler Stack Height Above Roof

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

Outdoor boiler stack height above roof.

Provide a stack velocity of a minimum of 1 4 times the wind velocity. Owb s should be utilized only in rural settings. 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. The top of the chimney should be at least 3 ft 0 92 m above the roof surface.

It s 6 inches in many states but especially in northern states like minnesota it s 12 inches. This started out as a question but found my own answer. All new owbs must be equipped with a permanent stack extending a minimum of 18 feet above ground level. Requiring a stack height of x feet above any structure within a 50 to 200 radius creates a very real liability issue.

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. For 18 feet of run you would have a rise of 72 inches. Place the stack as far from the intake as possible 50 ft is recommended. Place the stack at least 10 ft high on most roofs to avoid recirculation.

Provide ample stack height a minimum of 10 ft above adjacent rooflines or air intakes. Vertical blue line along the left side of the chimney in our photo. For the next example you have a shorter chimney height. Minimum stack height requirements for outdoor wood burners owb s.

If the previous calculation results in the required height of 64 inches we can see that the top of the pipe will not rise above the roof peak but would still meet the requirements of the rule.