How To Run Flexible Ductwork In Attic

Choose the right duct size and layout.

How to run flexible ductwork in attic. Isley s home service inc. It was new when the ac was put in 7 years ago. But without proper support ducts can develops sags or kinks that reduce airflow 4a 4b. If quiet operation and energy efficiency are very important to you you might want to go with duct board made from pressed fiberglass which is more expensive but very quiet and efficient.

This is a short training video to show technicians and homeowners how to properly install flex duct to plenums. To prevent problems use saddles or straps to support at regular intervals 4c 4d follow the manufacturer s instructions but in case they get lost here is a list of best practices for. For more information about the use of flexible ducts read this achrnews article about ductwork design. One interesting bit of info that many installers need to understand is that flex ducts need to have the inner liner pulled tight.

The attic ductwork is flex duct work. Give your ducts the proper support. Improperly supported flex. The prior owner just had a new ac system installed in which they switched from the equipment and metal ducts in the crawlspace to flex ductwork equipment in the attic where temps have regularly been in the 130 150 degrees this summer.

In this tutorial i am happy to show you how to properly install flexible duct to a register can for all you heating air conditioning ventilation do it your. Unfortunately this practice is all too common in our northern cold climate putting air conditioning ducts in the hottest. Don t let a contractor talk you into it. This is an especially relevant tip for flex ducts more on that in a minute but you need to make sure any ducts in your attic have proper support.

I called out the original hvac company and they took a look and said they saw no water. If it s not tight the friction rate jumps significantly and that means the air flow takes a hit. Ducts should be able to run between studs in the wall and then turn into a joist bay the space between two joists. Make sure the studs and bays line up well enough to leave a clear path.

Hard ducts without proper mooring will be unbalanced and unbalanced ductwork might be to blame for a number of hvac problems. In warm climates it is common practice to run heating and air conditioning ducting through attic spaces simply because it is easy to do. In my experience heating ducts that run through attics cause serious problems in snow country.