How to Install a Duct Kit How to Install a Duct Kit

What You'll Need
Air duct kit
Fixing screws for suspension wire end brackets

Installing a duct kit can be accomplished even by those of us who have no experience working with air ducts at all. Your duct kit will come with an instruction manual and list of materials; however, following this short guide will help the job to run smoothly.

Step 1 - Attach End Bracket

Measure the distance to the ceiling in the area that you intend to hang your air ducts. Make sure that they do not hang too far down into the room in which you are installing them. You want to be certain that you have plenty of head room to walk around in the area that you install your air duct. Also you want to make sure that the air duct will not interfere with lighting or other systems that are attached to the ceiling. First you will attach the end brackets from your duct kit to the wall. Fixing screws will most likely not be provided in the kit. Once the bracket is in place you will attach a thimble bolt fitted with two wire grips spaced at least 2 inches/50 mm from each other.

Step 2 - Attach Suspension Wire

Attach the suspension wire to the wire grips on the suspension bolt and then pass the wire through the length of air duct you are hanging. Attach another wire grip to the top of the air outlet and attach the suspension wire here as well.

Step 3 - Tensioning the Suspension Wire

Make sure that the tension adjusting bolts that came in your kit are unscrewed to full open and then attach one to each end of the suspension wire. Once everything is in place and the air duct is hanging loosely use the tension adjusting bolts at each end to tighten up all of the slack in the suspension wire.

Step 4 - Attaching Air Duct to Air Outlet

Slide the air duct along the suspension wire and over the air outlet. You will want at least 6 inches of overlap on the air outlet. Once in place seal the two together securely with duct tape. The end of the air duct that is not attached to the air outlet should be trimmed so that there is at least 3 feet of clearance between the duct and the wall.

Step 5 - Sealing the End of the Air Duct

You can use in impulse heat sealer to seal off the end of the air duct. If you do not have an impulse heat sealer available you can fold the end over and seal it with duct tape.

Step 6 - Reinforcement

If the air duct sags you may need to fix areas where the supports meet the ceiling. Any areas that need reinforcement can be fixed with duct tape. Also you should reinforce the suspension points of the air duct with duct tape to strengthen and protect the air duct.

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