4. The intake terminal shall be equipped and maintained with a 1/2" wire mesh screen in good working order to prevent accidental blockage from entry of foreign objects Location of Wall Terminals Fig. 1 Outside air intake riser.
3 Figure 2: Permissible exhaust termination locations. The venting system is only fora single appliance. Venting of an additional appliance could cause serious injury or loss of life. The venting system shall not be routed into, through, or within any other vent, such as an existing masonry or factory-built chimney. Screens on intake and exhaust terminals must be kept in good working order to prevent debris from entering the venting system. Sealing of the Vent Piping The discharge side of the sealed combustion venting system operates under a slight positive pressure. It is