Canister models such as the Miele Complete C3 Brilliant, are more powerful and efficient for thick carpets than are upright vacuum cleaners, according to AllergyBuyersClub.com. They operate with a separate power head that utilizes two different motors and work well on thicker pile carpet.
AllergyBuyersClub.com rated the Miele Complete C3 Brilliant Vacuum the canister category winner. It is quiet and stable, with an active HEPA filter that picks up to 99.9 percent of damaging particles and retains them in the filter. This vacuum has a six-stage suction control, a large capacity and a 1200 watt motor.
The second highest-rated vacuum is the Miele Complete C3 Marin. Available with three different power brushes for different carpet types, this vacuum is recommended for thick carpets and rugs as well as hardwood floors. It received a five-star rating for cleaning power and effectiveness and has a superior filtration system. It was voted best performer for homes with wall-to-wall carpeting or a mix of carpets, rugs and wood floors.