My home is 28 years old. We replaced the entire AC system one year ago excluding the ductwork. It is flexible ducting and I would just replace it with the same sizes in the existing configuration. Is this something I can do myself or does it require hiring someone? Thanks to anyone who can help.
Yes you can , its important to keep sizes to the correct size and insulated r-value,cut off any excess and secure to duct properly. MAKE SURE you secure to the duct properly so it wont come apart next year.
razer knife,wirecutters,duct tape and or drill and screws