Diy Duct Work Attic Installing

In this video i use mastic and air duct sealant t.

Diy duct work attic installing. If those dampers can t be accessed from below you ll want to install them close enough to the register so that you can reach them through the register opening. Supply air duct installation. Do it yourself hvac. It was new when the ac was put in 7 years ago.

The attic ductwork is flex duct work. Installing flexible or insulated duct is an easy diy project. Install dampers at the registers to adjust airflow. Place ducts on top of joists in a ceiling or attic.

Take care not to place your duct work too near any strong sources of heat such as that in a hvac device and avoid curling the duct around a sharp point. Remove existing ductwork where needed. I called out the original hvac company and they took a look and said they saw no water. The first thing you want to do is take either air duct sealant or mastic and spread it around the take off.

Each register should have its own damper that can be accessed for adjustment. The take offs may have an inside hammer lock which is a flange that bends over inside the plenum. I ll show you how to get the job done right. Adding heat runs in a basement may change the airflow in the ductwork going to other rooms.

I use the caulking gun with air duct sealant to get back in the spaces it s hard to reach with the mastic. Raise the plenum up in place and attach with self tapping screws. If the air duct isn t long enough it is possible to add extra length. Recently i had another hvac company come out and put in a new bathroom vent and they told me they believed the duct work was full of water.

On the floor cut in and attach the rectangular take offs to the front and rear of the plenum. The trick to getting these installations right is to use rigid ductwork for all deviations from straight then pull the ductwork taut between the two ends which now point towards each other. The big advantage over a full rigid installation is sound control the installations are quieter than fully rigid ones. Run the new flexible air duct under the house from the floor return to the underside of the air handler and attach to the metal vent box or plenum image 1.