How to Cover Unused Air Ducts

Unused air ducts can be a drain on your home's energy system. There are many different ways that you can cover unused air ducts, but some may not be safe. Find out how you can save money on energy costs and improve the look of a room quickly and easily.

Things You'll Need

• Air duct covers
• Duct tape

Instructions

1. Start by measuring the size of your air ducts. Most homes will have a standard size duct, but mobile home ducts may be slightly smaller. Older homes may not have standard ducts either, and many may vary in shape and size from room to room.

2. Decide if you want a decorative duct cover, or a simple one. If you are certain that you will be closing off a duct permanently, you can select a duct cover that will not reopen. However, it is best to pick a duct cover that will give you the option of reopening the duct at a later time.

3. Insert the duct cover into the open duct. The fit should be tight, without having to force the cover over the duct. Do not try to shove the cover in, since you may warp the duct.

4. Check for any edges where air can escape. If your air duct cover is not tight, it will be possible for air to escape through the edges, negating your energy savings. Place duct tape around these edges. For aesthetics, you can paint the tape to match the color of your walls, or the duct cover itself.

Tips & Warnings

• While you can use duct tape to cover unused air ducts, it is not as safe as using a proper duct cover. The money you'll save on energy costs will more than make up for the initial expense of your duct covers.