Winix U450 Air Purifier VS. Alen BreatheSmart FLEX

Features a True HEPA Filter that captures airborne-pollutants as small as 0.3-microns at an efficiency of 99%.

It can purify air in rooms of up to 450sq.ft making great for use in large-rooms of your home.

It uses an Advanced Odor Control Washable Activated Carbon filter & PlasmaWave Technology to eliminate cigarette-odor and other chemical-pollutants.

This machine can purify rooms of up to 450sq-ft making it perfect for use within medium-to-large rooms. It also features a powerful airflow that can circulate the entire room quickly.

It uses PlasmaWave-Technology and Antimicrobial CleanCell Protection on the True HEPA Filter to eliminate and prevent the growth of germs and bacteria within your home.

Uses Antimicrobial CleanCell Protection Technology coupled with a True HEPA Filter to eliminate dust-mites from your home environment.

The Anti-microbial True HEPA Filter can capture 99% of airborne-pollutants including; pet-dander and other allergens as small as 0.3-microns to help you live comfortably with pets.

Uses a True HEPA Filter to remove pollutants like pollen and other airborne-particles down to 0.3-microns at an efficiency-rate of 99%.

It uses a Washable Odor Control Carbon Filter & PlasmaWave technology to eliminate cooking-smoke, cigarette-smoke and other household-odors.

It uses Antimicrobial CleanCell Protection Technology coupled with a True HEPA Filter to eliminate mold-spores at an efficiency of 99%.

It can eliminate 99.99% of allergens and other airborne-pollutants using an Anti-microbial True HEPA Filter.

This device can operate quietly when set to the lowest speed-setting and also features a sleep-mode that ensures whisper-quiet operation with lights-off.

Features a Washable Anti-bacterial-Pre-Filter and Washable Odor Control Carbon Filter. Both filters must be washed every 3-months for maximum effectiveness.

It comes with easy to replace filters that can be conveniently accessed by removing the front-panel using simple tools like a screw-driver.

Its Auto-Mode and Air-Quality-Sensor combine to automatically determine the best fan-speed to filter the air within your rooms so as to maintain a clean living-environment.

This device can sense low-light and then automatically enters sleep-mode which turns down the fan-speed and dims the panel-lights for quiet night-time operation.

This unit has a maximum energy-consumption rate of 110-watts which makes it very energy efficient and perfect for use in any home.

This device is Energy Star Certified because it uses only 110-watts at the highest speed setting and a lower-wattage at the lowest speed-setting.

Features an electronic control panel at top-section with several modes like; Auto, sleep, PlasmaWave, Fan-speed, and several LED-indicators and sensors.

There is an integrated filter-change-indicator that will light-up to let you know that it’s time to replace the true-HEPA-filter and Washable Carbon Filter.

It’s very energy-efficient and will help you save a lot of money on electricity bills annually.

This unit is very affordable yet it has some of the best features.

Uses Antimicrobial CleanCell Protection Technology and an Anti-microbial True HEPA Filter to effectively remove 99.99% of allergens which are the main causes asthma.

Comes with a remote-control that facilitates for convenient-operation within a 20-foot radius from the unit.

The Anti-microbial True HEPA Filtration must be replaced every 12-months while the Odor-Control-Carbon-Filter & Pre-Filter must be washed every 3-months and replaced after 12-months.

It uses PlasmaWave-Technology that is an ozone-safe and complies with California Air Resources Board (CARB).

Features a simple tower-shaped body with a control-panel at the top-section featuring several modes, LEDs and sensors coupled with a bottom-stand and air-vents on sides.

Has dimensions of; 18.9 x 11.8 x 25.6-inches which makes it very portable. It also has a white, nice-looking, tower-shaped-body made of durable ABS-plastic.

This device weighs about 18.7-pounds which makes it easy to lift and move from room-to-room.