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Beam claims that the Model 3700 Serenity IQS is one of the quietest and most powerful central vacuum systems on the market. Its power unit delivers 600 air watts of cleaning power and 140 inches of water lift, and is heavily insulated and mounted on anti-vibration hardware to reduce noise. Other features include a self-cleaning HEPA filter and a 4-gallon dirt receptacle that’s treated to prevent mold growth. The system can serve homes as large as 7,000 square feet. The power unit costs about $870 and the hoses and wands about $545.

Beam Central Vacuum Systems, 800/369-2326, beamvac.com.