Osburn Horizon OB04010, Installation And Operation Manual

Page: 67 / 80

HORIZON – Installation and Operation Manual 67
3. Flip the fireplace lower decorative louver. Install the blocking plate (F) included with the fireplace, on
the front opening of the air control housing. Using a screwdriver, secure with four screws located in the
user’s manual.
Then, install the flexible pipe* (D) (not supplied) to the fresh air intake adapter (B) using one of the
adjustable pipe clamps (C) . Secure the other end of the pipe to the outside wall termination (E) using the
second adjustable pipe clamp (C) . The outside wall termination (E) must be installed outside of the building.
*For a pipe length less than 20 ft, use a 5 ″ pipe diameter. For a pipe length of more than 20ft, or having
more than two deviations, use a 6
″
pipe diameter. The maximum pipe length is 30 ft (9 m).