How to Install Heating Ducts

Many older homes were not built with sufficient ductwork to handle the efficiency and productivity of modern furnaces. The result is that your furnace, and your wallet, produces a lot of heat that is never utilized in your home.

By learning how to install heating ducts, you can re-route this heat to maximize the energy efficiency and comfort of your home during cold weather. It may seem like a big task, but with the proper information and preparation, you can install your own heating ducts.


As you learn how to install heating ducts, you will discover that the first several steps to beginning a ductwork project are always the same. First, you must determine how much material you are going to need. Your best bet is always to buy a little more than you think you are going to need. Since ductwork is always assembled on the job site, you will want to have extra, just in case you didn’t measure correctly or make a mistake while cutting.

You’ll have to make some rough measurements of linear footage and formulate an educated estimate on how many lengths of ductwork you need. You will also need to draw a rough sketch of your ductwork’s layout so that you can count how many elbows and other fittings you will need.


A second common step that you will encounter when learning how to install heating ducts is determining what size ductwork to use. You need to use the proper sized ductwork and vents in order to maximize the potential of your furnace. The ideal size of the ductwork and vents will be determined by factors like the size of the room, how many vents are in each room, and how far the ductwork is running from the furnace itself.

One facet of learning how to install heating ducts that is often overlooked concerns the seams. At every joint where two pieces of ductwork meet there is the potential for air loss. With every waft of hot air that leaks out of the ductwork, comes an increased workload for your furnace.

Taping Seams

Make sure that you spend the necessary time to tape each seam in your air moving system. Additionally, you may want to consider insulating portions of the ductwork system. If the air from your furnace has to travel a long way to get to the vents, then it will be getting cooler while it travels. Insulating the ductwork can slow down this cooling process drastically.

The bottom line, as with any home improvement task, is that you can save money by learning how to install heating ducts. You will save money on your energy bills by improving the efficiency of your house, and you will save money because you won’t have to pay high labor rates for a contractor to do the work. You will only have to invest minimal dollars in the material required to complete the job.

See Also: Noisy Heating Ducts