1. Cut around opening in the outside wall at the selected location. Apply silicone to the backside of the outer face plate and secure it to the outside wall. 2. Insert the Aerocowl termination from the outside up to the outer wall stop. Ensure proper slope. 3. Slide inner plate on the termination up to the inside wall, tighten the gear clamp and secure the inner plate to the wall. Option 2: Installation of the concentric termination. 1. Cut a square 7" opening in the outside wall at the selected location. Remove the 4" air intake collar from the termination assembly. 2. Apply silicone to the backside of the wall face plate. Insert the concentric termination from the outside. Ensure proper slope. Secure the face plate to the outside wall. Reinstall the 4" collar.