8. Connecting the Air Supply 

• Use one of the supplied wire clamps to hold the flex ducting to the air take-off.
• Use the remaining wire clamp to secure the flex duct to the humidifier's inlet.
• For maximum efficiency, do not let the flex duct sag. If you need to, trim the length of the flex duct ensure that you cut the ends square.
• If the humidifier is far enough from the take-off to cause strain on the ducting, it may be necessary to buy a longer flex duct at your local hardware store.
• Ensure damper is in the open position.
• Running the Furnace with the hose attached to it will allow the hose to stretch and reach further