MUFFLED  Some central vacsinclude a cylindrical muffler.
	WELL EQUIPPED Central-vac kits typically include a powerhead (top right, in above photo) and an assortment of tools.

For all vacuums

Bag-equipped. Models with a bag tend to be less messy to empty than bagless models, which tend to create dust in the process.

Brush on/off switch. Vacuums with this feature allow you to turn off the brush when cleaning bare floors or using tools. That helps you avoid scattering dust and reduces the risk of damage or injury should someone or something contact the spinning brush.

Manual pile-height adjustment. This feature can improve carpet cleaning by allowing you to adjust the height of the vacuum's powerhead to your carpet pile more precisely than the automatic systems on some vacuums allow.


For central vacs

Accessory kit. Midpriced kits like the ones we chose for this test typically cost $300 to more than $450 and include an electrically powered cleaning head--a must for carpets--as well as a floor brush, crevice tool, upholstery brush, dusting brush, and extension wands. Prices and performance in the Ratings of upright and canister vacuums (available to subscribers) include these accessory kits; spending more on a kit buys you more tools, a premium powerhead, and a longer hose.

Muffler. These sound-deadening devices are installed in the exhaust air pipe near the base unit. But you can add one to any central vac for about $10 to $25.

Suction switch. Having the switch at the wand's handle lets you turn the vacuum unit on and off where you're standing, rather than having to walk to the wall inlet.