Diy Duct Work Attic Installing

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.

Diy duct work attic installing.

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. It was new when the ac was put in 7 years ago. 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. I called out the original hvac company and they took a look and said they saw no water.

Installing flexible duct insulated duct diy 1. Supply air duct installation. On the floor cut in and attach the rectangular take offs to the front and rear of the plenum. The attic ductwork is flex duct work.

Do it yourself hvac. In this video i use mastic and air duct sealant t. The big advantage over a full rigid installation is sound control the installations are quieter than fully rigid ones. Avoid any hot elements such as water heaters heater or stove exhausts or hot water pipes and electrical elements such as junction boxes or.

Raise the plenum up in place and attach with self tapping screws. I ll show you how to get the job done right. Remove existing ductwork where needed. Each register should have its own damper that can be accessed for adjustment.

Install dampers at the registers to adjust airflow. If the air duct isn t long enough it is possible to add extra length. The first thing you want to do is take either air duct sealant or mastic and spread it around the take off. 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.

I use the caulking gun with air duct sealant to get back in the spaces it s hard to reach with the mastic. The take offs may have an inside hammer lock which is a flange that bends over inside the plenum. Adding heat runs in a basement may change the airflow in the ductwork going to other rooms. 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.