Think Best Air Purifier VS. Bissell air400 Air Purifier

Uses a HEPA filter to capture 99.97% of air contaminants. It works hand-in-hand with the Pre-filter and an activated Carbon filter which captures Odor and germs.

Features a 1 inch thick activated carbon filter to capture various household odors including cigarette odor.

Room coverage is between 300 Sq.ft and 400 Sq.ft. Air flow quality is great, the unit has an auto mode, but while in the auto mode, the CirQulate Syste offers thorough filtration basing on the quality of air in your home.

Gets rid of germs and bacteria that could cause harm to your health. The HEPA filter traps and removes 99.97% of air contaminants.

Captures and removes dust mites that hide in thick carpets, sofas, bed sheets, rugs ....etc.

If you suffer from allergies and have asthma - You will notice a huge air quality change when you put this unit in your room. It will get rid of pet dander and dust in your home.

Uses the HEPA Filter to capture and remove pollen that gets into the air you breathe thus saving you from pollen related allergies.

Can detect and remove smoke from your room. This could be smoke from the kitchen or from a forest fire next to your home

Uses its HEPA air filter to capture 99.97% of air pollutants including allergens of all types. , it will trap and remove those small allergens that pets release from their saliva and dander.

Runs quietly and it switches off its indicator lights when you switch off light in your room. You will sleep comfortably without getting any noise pollution.

The pre-filter is washable. It traps large particles so that they don't reach the HEPA filter and carbon filter. You can wash it once every week.

Simply open the purifier from the front panel and remove the old filters to be replaced.

While in auto mode, the unit's sensors will always be on alert of air contaminants. Once the sensor detects a change in air quality, it adjusts fan speed to increase suction power of the unit.

Using a Night Mode, the unit will detect that your room has got dark, so the white lights on the top of the unit will turn off and also the color wheel will go dim.

Uses only 75 watts while on its highest mode

Yes, it is energy start certified – your power bills won’t go up the roof.

All controls are found at the top of the unit. Modes include: Auto mode (auto detects air contaminants), Turbo mode (highest mode) and Silent mode (lowest mode - ideal for night time when you're sleeping).

The unit is Energy Star Certified. It uses 75 watts only while on the highest mode and filters air in your room 3 times per hour.

Well priced

Right, Its CADR is 279 for Smoke, 307 for Dust and 206 for pollen - so if you have asthma, you will find this unit relevant to your health.

On average it is 6 months.

It does not release bad gasses to the environment

Not so unique

16.1 x 9.8 x 24 inches

25.7 pounds