While the systems are generally sold installed, you’ll save money by doing the work yourself—with components and materials running between $800 and $1500, you’re not far from the price of an expensive portable model. For our home, we chose a Beam Serenity Series Model 2100 central cleaning system (c. 2001, ours ran about $900, uninstalled, Beam Industries, P.O. Box 788, Webster City, IA 50595; www.beamvac.com). A central vac system consists of a motorized pump and canister, wall and floor outlets, low-voltage cable, thinwall PVC pipe and fittings, plus a hose kit and beater bar. There are a wide variety of accessories available, but these are the basic components.
You’ll find two systems for powering the beater bar motor. Both types have wiring molded into the hose—a 120-volt line for the beater bar and a low-voltage line for the remote control of the central vacuum’s motor. The first alternative has a direct-connect inlet cuff (the fitting that connects to the wall inlet) that taps both low-voltage and 120-volt power as soon as you plug in the hose. This system requires wall inlets to be wired with 120-volt current. The other system has an inlet hose and fitting that handle the low-voltage connection, but the hose has an 8-ft. pigtail that draws 120-volt current from a nearby wall receptacle.
Direct-connect systems are more common in new homes because it’s easier to run the 120-volt lines during construction. In retrofits like ours, it’s easier to install the vacuum inlets near existing receptacles and plug the beater bar into one of those. In both cases, the vacuum’s motor and the beater bar are controlled by a switch on the hose grip.
This project was originally published in the September 2001 issue of Popular Mechanics. You can find more great projects at Popular Mechanics DIY Central.