Germguardian AC4020 VS. Alen BreatheSmart FIT50

It’s equipped with a HEPA-Silver filter that is coated with an antimicrobial compound that inhibits growth of bacteria and fungi.

It comes with a self-timer setting that can be set for 4, 8, or 12 hours. This self-timer also works along with the safety-off function.

This unit is designed to clean rooms of up-to 900SqFt every 30-minutes hence making it a perfect choice for use in big-rooms.

It’s equipped with an activated carbon filter that helps to absorb harmful particles such as cigarette smoke/odor.

Cleans air in rooms of up-to 900Sq.Ft & has a powerful fan that blows a jet of pure-air up the ceiling where it spreads-out across the room.

It uses a HEPA-Silver filter coated with an antimicrobial compound to eliminate germs and bacteria within air thus providing you with fresh breathable-air.

It uses a HEPA-Pure filter to effectively trap and eliminate dust within air in less than 30-minutes thus proving you with healthy breathable air.

Its uses an advanced HEPA filter to remove up to 99% of pet-dander and other airborne-pollutants from air to help you comfortably live with pets

The integrated HEPA-Silver filter helps to trap and eliminate 99% of pollen and other allergic-pollutants from air in-order to keep your house fresh and healthy.

It uses an activated carbon filter to absorb harmful particles such as smoke and other household-chemicals so as to keep your house clean and fresh.

The HEPA-Silver Filter is best for removing mold and other airborne-allergens from home environment. In fact, this device will entirely eliminate mold-issues from your home.

This unit uses a HEPA-Silver Filter to trap and eliminate airborne allergens thus making it a perfect appliance for use in homes with allergic-people.

It uses Proprietary WhisperMax technology to produce minimal noise disruption coupled with soothing pink-noise-tones that promote better sleep making it ideal for use in master-bedrooms.

It features a washable pre-filter that helps to capture larger-sized contaminants within air like; dust and hair. This pre-filter can be either washed or vacuumed.

It’s equipped with an easy to replace HEPA-Pure Filter that features several layers of filter technology in-order to provide the highest air-quality.

It uses a Laser Smart Sensor to detect airborne particles down to 0.3-microns coupled with an Air-Quality Indicator-Light that reflects room’s air-quality in real-time.

All modes use WhisperMax-technology to create minimal noise-disruption coupled with soothing pink-noise tones for better sleep. In fact, SleepScore endorsed the 'pink-noise' frequency of this device.

This unit uses 105 watts on a maximum speed setting and a smaller-wattage of the lowest-setting. Additionally, it uses 120-volts of power supply.

This device is very energy-efficient whereby it uses the same amount of electricity as a 65W light-bulb. It also uses only 105watts on maximum speed-setting.

It features simple, digital soft-touch blister type buttons located at the top-section coupled several modes & LED-indicator lights for easy control and maintenance.

This device features a filter-change indicator that will turn red to let you know that it’s time to change the HEPA-Silver filter for optimum performance.

This device is Energy-star certified for conserving energy hence making it very economical and perfect for use in any home.

This unit can eliminate most air-contaminants like; dust, mold-spores, pollen and pet-dander thus making it perfect for use by asthmatic and allergic people.

This HEPA filter should be replaced every 6-to-8 months or depending on the air-quality of the area your living in.

The Auto-Off safety feature will disable this device whenever the front-cover panel is taken out hence making it safe to use in homes with kids.

It features an Ozone-safe Ionization stage that can be triggered by pressing the Ion-button on the top panel. Its advanced ionization-system won't generate dangerous ozone.

It’s a nice-looking tower-shaped unit with simple-to-use controls and lights at the top-section. Additionally, it has 14 versatile designer-panels to suit multiple tastes and decors.

This device features dimensions of; 10 x 17.8 x 26.8 inches coupled with a tower-shape and simple-to-use controls and lights at the top-section.

It features a weight of 16-pounds which makes it a bit easy to move from room-to-room while at home.