Are gravity furnaces energy efficient?

Hello, thank you for reaching out. Yes, these direct vent gravity furnaces combine a direct vent, sealed combustion design with natural convection heating. This helps to reduce energy losses while it eliminates the need of electricity to circulate the heat (if the blower accessory is installed - it will require electricity to operate). 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.