Boiler Vent Height Over Roof

This specification makes sure steep roof slopes are cleared.

Boiler vent height over roof. Exhaust vents must be protected against rain and equipped with back flow prevention features e g flap dampers. For gas vents or a type l vent this distance above the roof surface must be at least 2 ft 0 61m. Table of rooftop chimney clearances for metal b vent chimneys flues. Our photo above shows an energy kinetics oil fired heating boiler vented using an oem direct vent system.

Above the roof plumbing vent height. 1 0 foot above the roof surface 1 7 12 to 8 12. The at the 1 means 1 foot minimum for 6 12 and under and then goes up according to that chart. Heat loss in the vent 3.

Exhaust vents must not be located where they might be obstructed by drifting snow consult local experience as to the height of snow drifts against buildings. Vertical blue line along the left side of the chimney in our photo. A category i vent system works by allowing heated flue products to rise vertically so the vent pipe must rise vertically from the boiler vent connection as soon as possible. 1 5 feet above the roof surface.

2 5 feet above the roof surface. Vent pipes should extend to outdoors above the building roof and should terminate vertically not less than 6 above the roof surface nor more than 24 and must be at least 12 from any vertical surface such as a nearby sidewall. In all areas exhaust vents should be at least 1 foot above roof surface. The stained wall photo photo below shows what can happen at a direct vented high efficiency heating boiler if the vent is not properly sloped through the wall.

There are many variables dictating how well a vent system will operate. Restrictions to flow and 6. Flue gas temperature flue gas temperature affects vent operation because the hotter the gases are the lighter they are. Upc i 906 1 and 906 2.

All horizontal runs of vent pipe must rise 1 4 inch per foot of run to maintain proper draft in the vent. Shown below is the exterior wall of the same installation. 2 0 feet above the roof surface. Vent system capacity 5.

Above the roof surface with a listed cap or listed roof assembly. The top of the chimney should be at least 3 ft 0 92 m above the roof surface. Roof pitch rise run in inches. You should also limit the length of the horizontal flue pipe.