Outdoor Boiler Stack Height Above Roof

Place the stack at least 10 ft high on most roofs to avoid recirculation.

Outdoor boiler stack height above roof.

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. 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. All parties involved should become very aware of the liabilities and consequences of such regulation.

It s 6 inches in many states but especially in northern states like minnesota it s 12 inches. Place stack downwind of air intakes. 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. For the next example you have a shorter chimney height.

Provide a stack velocity of a minimum of 1 4 times the wind velocity. Place the stack as far from the intake as possible 50 ft is recommended. 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.

Provide ample stack height a minimum of 10 ft above adjacent rooflines or air intakes. For gas vents or a type l vent this distance above the roof surface must be at least 2 ft 0 61m. For 18 feet of run you would have a rise of 72 inches. Minimum stack height requirements for outdoor wood burners owb s.

This specification makes sure steep roof slopes are cleared.