Ductwork has a lifespan of 20 to 25 years. It is often recommended to replace the ductwork every 15 years for a maximally efficient system since deterioration in the seals and joints can cause severe leakage.

Here are some signs that it might be time to replace the ductwork:

• Your home feels muggy in the warmer months
• Your home is warmed or cooled unevenly
• Your energy bills are rising
• You are noticing dust throughout the home
• You notice musty smells coming from the vents

It often takes between 2 to 3 days to install ductwork in a home. However, the length will vary depending on several factors including: size of the home, condition of ductwork, and the accessibility of the HVAC system.