Obtain the furnace manufacturers installation
instructions and install the furnace to their specifications.
Establish the best location for installation
of forced air unit and vent.
An attic in which a FAU is installed shall be
accessible by an opening and passageway 30" x 30" in size. Attic access may
be reduced to 22" x 30" provided the largest piece of equipment can be removed
through the opening.
Install passageway platform minimum 24"
inches width and maximum 20 feet in length to FAU.
Install working platform not less than 30" in
depth and width in front of the entire firebox side of the FAU.
A permanent electric outlet and lighting
fixture controlled by a switch located at the required passageway opening
shall be provided at or near the furnace.
Install vent, roof flashing and vent cap.
Double wall type "B" vent requires minimum 1" clearance to combustible
materials and requires a minimum 5' - 0" vent termination above the highest
vent collar it serves.
A means shall be provided to disconnect the
FAU from the power source for servicing the appliance. See manufacturers
installation instructions for approved disconnect method.
An approved shut off valve is required to be
installed at the gas piping outlet, immediately ahead of the flex connector,
and must be accessible.
