Unit comes in two sections that allow for flexibility in positioning the duct at the most convenient height. You can duct from the back of the unit, or from the top of the unit by removing the top cover. Duct can go through an outside wall, the floor joist or window. 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 total 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 are that a longer span is required, 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.
Duct must be dedicated and not combined with any other existing ductwork in operation. Seal well around the outside opening.
When 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 models DVS-BS and DVS-BH, which are adjustable in height, the hole is in the box/rim joist between the floor joists of the basement ceiling, or through the wall.
Is the Humidex exhaust duct dedicated (Humidex use only) and fully stretched without any kinks or turns to interfere with airflow?
- Deduct 1 CFM for every foot of extra ducting length.
- Deduct 7 CFM for every 90 deg. turn in duct.
- Recommend using rigid galvanized piping for any extra lengths of ducting required.
- Never use chimney to vent out Humidex exhaust, due to the density of humid air being expelled.
Was a 6 1/4'' hole used to exhaust the Humidex?
Never reduce the size of the Humidex exhaust. Reducing the exhaust size creates static pressure and greatly reduces the operation of the Humidex and life expectancy of the fan. Old dryer exhaust holes are not an option and should be avoided.