Seal ductwork register boots
Why it matters
Unsealed ductwork boots lose 25-30% of conditioned air, making this one of the highest energy ROI repairs in older homes.
Stop forgetting to do this.
Hearth generates a personalized maintenance schedule so you never miss another seal ductwork register boots.
How to do it
- 1
Turn off the furnace at the thermostat or breaker to ensure safety.
- 2
Access your basement, attic, or crawlspace to view the ductwork system.
- 3
Locate supply duct boots where branch ducts connect to floor or wall registers.
- 4
Inspect each boot connection for visible gaps or loose seams.
- 5
Clean dust and debris around the boot seams with a dry cloth.
- 6
Apply metal foil HVAC tape across any small gaps and over seam joints.
- 7
For larger gaps, apply duct mastic around the boot perimeter with a putty knife.
- 8
Allow mastic to cure fully per product instructions before restarting the furnace.