Shark DuoClean NV831 VS. Shark Navigator NV356E

300 Air-Watts.

It can be used commercially because it is very powerful and never loses suction coupled with a large dust-cup.

Fingertip controls allow for quick transition between hard-floor and carpet-mode. Additionally, DuoClean-Technology features a bristle brush to deep clean carpets while an additional soft Brushroll cleans hard-floors.

Its dual-action Brushroll rotates at speeds of up-to 12,000-RPM.

The Pet Multi-Tool and Pet Power Brush allow for easy pet debris pickup.

This unit is corded and will provide longer run-times using direct power.

This device can be very silent when cleaning-up your home most especially running under Barefloor-mode.

DuoClean-Technology features a bristle brush that deep cleans carpets.

This vacuum-cleaner is easy to clean and comes with washable filters for easy maintenance.

Powered Lift-Away Technology allows you to lift the canister away for easy cleaning of hard-to-reach areas. In fact, this technology gives you the ability to clean under furniture and above floor with the push of a button.

It features advanced swivel steering technology that facilitates for ultimate maneuverability when cleaning around obstacles like furniture.

Yes

The vacuum weighs approximately 17.2-lbs in upright-mode and a lesser weight in Lift-Away mode which makes it very lightweight and easy to use when cleaning-up your entire home.

With Powered Lift-Away Technology, you can easily lift the canister away for handheld cleaning. This device also features an extendable Under Appliance Wand for Superior cleaning of hard-to-reach places.

It uses 1150-watts of power coupled with a strong DuoClean-motor.

The dust cup holds 1.5 dry quarts to the max fill line.

Anti-Allergen Complete Seal Technology and HEPA-filter help to trap dust and allergens inside the vacuum as you clean-up your home.

The LED-lights on the handle and floor-nozzle help to illuminate light into dark-areas so that you clean-up all debris.

2 power-modes: (Brushroll-setting & Bare-floor setting).

Duster Crevice Tool, Pet Multi-Tool & Pet Power Brush.

This device is produced with a combination of durable plastics like ABS and PP, along with some metal and rubber components.

It is affordable and fairly priced.

• Large dust-cup. • DuoClean-Technology. • Advanced swivel steering. • Powered Lift-Away Technology. • Deep cleans hard-to-reach areas. • Soft-Brushroll cleans hard-floors. • Bristle brush to deep clean carpets. • HEPA filter to trap dust and allergens. • Anti-Allergen Complete Seal Technology. • Fingertip controls for easy powering on/off. • Quick transition between hard-floor & carpet-mode. • Pet Multi-Tool & Pet Power Brush for easy pet hair pickup.

 It not cordless.