Full Product Manual
Humidex
11
Selecting the Duct Location
Now that you’ve decided where to install the unit, you must select a location for a 6¼” duct hole in
the outside wall. This hole is needed to pass a duct through the outside wall. Make sure that the hole’s
location is above ground level. Also make sure that the hole doesn’t line up with a stud, electrical
wires, or pipe.
For an interior wall installation: The distance between the Humidex back and the exterior wall should
not be more than 12 feet. For this application the flex has to be replaced with rigid piping. Optional:
The bottom cap may be removed for added airflow.
Ducting
The HCS-BS comes in two sections that allow for flexibility in positioning the duct at the most
convenient height. For both models you can duct from the back of the unit, or from the top of the
unit by removing the top cover. The duct can go through an outside wall, the floor joist or window.
The duct should be vented above ground level to the outside or below ground into a window well that
is open and not sealed off to the outdoors. The outside louver should be high enough to avoid
infiltration of snow, flooding and rodents, etc. All necessary parts and outside louvers are included.
In cases where the basement height clearance is too low, the top portion of the bottom section can
be cut down by a maximum of 40 inches with a cutter, leaving the vents at the bottom intact, for a
minimum unit height of 62 inches. For extra high ceilings, an extension piece of 24 inches is available
which can be added at the top of the unit.
When ducting the unit outside, no more than 3 feet of Vinyl Flex should be used. When circumstances
require a longer span, rigid ducting can be used from the inside of the unit to the wall. The rigid duct
will improve the airflow to compensate for the additional distance the air has to flow to reach the
outside.
When replacing a pane for a window installation, use pressurized wood or similar water/rot proof
material.
Make sure that no pipes, studs or wires are in the way.
The duct has to be dedicated and not combined with any other existing ductwork in operation. Seal
well around the outside opening.