Duct system blue pipes installed in roof Duct system silver pipes Duct system inside home Duct system blue pipes Duct system in attic Duct system blue pipes in attic Hanging Duct system Duct system red pipes in home Extract Duct system Duct system red & blue pipes Duct system red & blue pipes Duct system silver & blue pipes Duct system silver & blue pipes Duct system fully connected wall mounted Duct system Wall mounted Duct system fully installed Small Duct system in attic of home