Coway AP 0512NH Air Purifier VS. Bissell air400 Air Purifier

Features a True HEPA filter that removes 99.97% of airborne-allergens and contaminants down to 0.3-microns.

It features an Air-Purification-Timer that allows for scheduling between 1, 4, 8 and 12 hours of operation. It also features a Sound-Therapy-Timer that allows for scheduling between 15, 30 & 60 minutes.

Uses an Odor and Deodorization Filter infused with granular activated carbon to trap and eliminate cigarette-odors and other harmful gases.

It’s specifically designed for use in small-to-medium sized rooms of up-to 155sq.ft. coupled with 4 Air Changes per Hour. It also features an Airflow-rate of: 3.7CMM.

Uses a high-performance True HEPA filter to remove 99.97% of germs and other microscopic allergens as small as 0.3-microns.

It can capture and eliminate dust-mites using a True HEPA filter hence saving you from allergies that are triggered by dust.

Its True HEPA filter can eliminate 99% of microscopic-allergens including Pet-dander in-order to help you live comfortably with pets.

The high-performance True HEPA filter can trap and eliminate 99.97% of microscopic-allergens including pollen.

Uses an odor and deodorization filter infused with granular activated carbon to trap and eliminate smoke and other harmful gases.

Effectively eliminates mold-spores from air using a True HEPA Filter so as to keep your indoor-air fresh at all times.

The integrated True HEPA filter can trap and eliminate 99.97% of microscopic-allergens and other fine-particles as small as 0.3-microns.

With a noise level of: 21.5~48.7 dBA, This device can operate silently at all fan-speeds. it also features 6 soothing sounds which help in creating positive herapeutic-effects on sleep problems

You can wash, rinse, dry and re-use carbon pre-filters to extend their life-span. But don’t wash them all the time because they will end-up losing their effectiveness.

You don’t need any tech-expert to do filter-replacements for you with this device. You just have to clip-off the front-panel and then do the replacements yourself

An Auto-mode works along with an air quality indicator to sense indoor air particles and then adjusts fan-speed accordingly to reduce airborne-pollutants.

This device can be set to a low fan-speed so as to achieve whisper-quiet operation or set with some soothing-sounds that help create an ideal sleeping-environment for everyone.

This unit features a Power-Consumption of: 19.3-to-53.1 Watts which makes it very energy-efficient.

It is Energy Star Certified for low energy consumption with only 19.3-Watts at speed-1 and about 53.1-Watts at speed-3.

This unit features customizable modes which include; Speed-mode, Air-Timer, Sound-Timer, Filter-change-indicator, Sound-mode, Volume-control and a power-button.

The filter-indicator will help to alert you when it’s time to make necessary filter-changes. In fact, the filter-change-button can be reset after making replacements

A very economical appliance with a Power consumption of only: 19.3~53.1 Watts and it’s also Energy Star Certified.

This unit is very affordable and efficient.

It has a coveted Seal of Approval from the British Allergy Foundation (BAF) which implies that it’s scientifically tested to reduce and eliminate allergens.

The True HEPA filter lasts up to 1-year while the activated carbon odor filter lasts for up to 6-months before requiring a replacement.

This unit doesn’t produce harmful-ozone pollutants within air.

It has a sleek tower design with controls at the top coupled with an air-intake on sides and air-outlets on top. It also features several LED-lights.

Features a simple and compact design with a dimension of: 13.8"W x 8.3"D x 14.5"H.

It’s lightweight and only weighs about 4.0kgs (8.8-lbs) which makes it easy to carry and move from room-to-room.