Want More Bang for Your HVAC Buck? Seal Your Leaky Ducts

According to Energy Star, leaky ducts reduce heating and cooling efficiency by 20% in a typical home. That's a huge waste of your hard-earned money, but it doesn't have to be that way.

In our experience, ductwork leaks are a result of poorly connected and poorly installed duct systems. Here's a list of ways to seal your ductwork and stop overpaying to heat and cool your home:

  1. Pull down all of your air registers (also known as air "grills" or vent covers) and caulk with silicone between your duct boot and the surrounding sheetrock.
  2. If you've got flexible ductwork, pull back the outer insulation layer and apply mastic to the collar of the duct boot.
  3. After you've done that, take the interior vinyl section of the duct and reconnect it to the boot collar. Use a duct tie to strap the vinyl around the boot collar, ensuring an airtight seal.
  4. Pull the insulation layer back over the vinyl and use mastic to secure the insulation to the boot.
  5. Make sure your boot is properly insulated.
  6. Pull the insulation layer back where the duct connects to the indoor unit and repeat steps 2-3.
  7. For hard pipe ducts, pull back the insulation and seal all connections and elbows with mastic. Then re-insulate.

Sealing your ductwork keeps the air you pay to heat and cool inside your home. After all, that's where it belongs.