What is the benefit of a sealed direct vent furnace system?

Hello, thank you for reaching out. Sealed direct vent furnace systems pull combustion air from the outside and vent their exhaust back outdoors as well, which helps to improve indoor air quality and safety. If you have additional questions, please feel free to reach out over the phone to our Customer Service line at 1-888-901-5460. Have a great rest of your day.