Direct vent termination layout (roof and sidewall)

What is going on

Intake and exhaust must share the same pressure zone, and the two pipes should be as close together as possible at the termination.

Check in this order

1. Make sure intake and exhaust both exit through the roof or both through the side wall. Do not split them.
2. Keep intake and exhaust on the same side of the structure.
3. Keep the separation at the terminations to 3 in. (76 mm) maximum on roof terminations and 6 in. (152 mm) maximum on sidewall terminations.
4. On a roof termination, turn the intake straight down using two 90 degree elbows.
5. Run the exhaust straight out or straight up.
6. Fit an exhaust reducer where the pipe exits the structure if needed to increase exhaust velocity away from the intake (see table 6).
7. Route the piping to avoid recirculating exhaust back into the intake.

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