Ductwork Installation

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DUCTWORK installation may cost you more than 50-dollars per hour if you hire a professional service. However, you may save an average of 2,000-dollars when you provide the labor on top of purchasing the materials on your own. Unfortunately, not everyone is gifted with handyman skills. If you think you are up for the challenge, we have just what you need. Follow our step-by-step installation process to get started.


Preparation stage

Referred to as the “rough-in” stage, the sub-floor of the registers and ducts are cut according to your duct plan. Be sure to keep the holes for your supply registers about 3-inches from the wall. The holes intended for return air opening are typically cut through its bottom plate, from interior wall through the sub-floor. Your metal plaster frame must be installed on top of the wall.


Air handler and evaporator coil must be set into place once the holes are made. Next is the plenum. If you do not have  central AC system, attach the plenum to furnace. Or, if you have central system, attach to evaporator outlet instead. Once you have it installed, install its take-off squared collars by insterting its tabbed portion into the hold. Add metal screw to secure.


Main trunk installation stage

Next on the DUCTWORK installation tutorial is the air-duct installation. To install, connect metal ducts to its start collars. Since it needs proper fit, you are advised to cut the hole on top of your duct. This hole is inteded for the branch take-offs. These branch duct take-offs are in the form of fittings that must be attached and it right in between the floor joists. Secure with a screw to each of its corners.


Transition piece must be installed periodically. It comes varied in size, from the size of your duct to one size smaller. This part must be surpported with metal hangers every 8-feet, and each must be connected by ‘s’ cleats and ‘drive’ system. The S cleats must be installed on the bottom and top of the duct piece. The drives must be able to slide on each side of the ducts in order for it to be held together.


Be sure to bent over each  of the drive tabs in order to hold them in place together. Next, install an end cap piece at the end of your newly installed supply duct. This process is then repeated until other main supply ducts are covered. Your basement must have its return and supply ducts. Last, connect branch ducts to register. That’s it, you have successfully installed your own DUCTWORK and save money!