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Follow the following procedure to vent through the roof:
1. Cut the necessary holes through the roof and ceiling.
2. Install the exhaust vent and air intake plastic pipes as shown in Figure 17. Make sure that the installation meets the
local codes and/or The National Fuel Gas Code ANSI Z223.1 (Latest Edition) or CGA/CAN B149 Installation Code.
Figure 17. Typical Vertical Power Vent System Installation