Vacuumology One - A Clean Education by Grant Olewiler
M.D. Manufacturing has been designing and installing central vacuum systems worldwide for over 40 years. As big brand names have entered the industry, there has been an influx of dubious sales pitches and promises that make intelligent purchasing choices difficult. We believe the best response to this development is education. It is imperative that you understand how vacuum power is created so you can determine which system is best for your home.
Modern technology has shed new light on some entrenched industry standards. After an extensive review of the following information, we feel confident you will agree, that M.D. central vacuums are truly the most technologically advanced units available.
In a vacuum motor, the rotating fans force outside air in through an opening on the bottom of the shell (you cannot see the opening in this photo). This motor has two fan stages - their is one seam separating two metal plates on the bottom section of the motor. Inside the motor the area between the rotating fans is stationary. The other components listed above perform the function of getting electricity to spin the armature which drives the fans.
The exhaust on this motor is peripheral - it comes out the holes above the shell. Other motors have a tangential, or what looks like a horned exhaust.
