Germguardian AC4020 VS. Alen BreatheSmart FLEX

It comes with a Pure Antimicrobial True HEPA Filter that captures 99% of airborne particles down to 0.3 microns to keep your home clean.

It equipped with a Pre-set timer that will allow you to select between 4, 8 and 12 hours of operation before the device shuts-off.

It uses an optional, Fresh Antimicrobial True HEPA Filter to trap and eliminate cigarette-odor. In fact, this filter is sold separately.

It can purify air within small-to-medium sized rooms of up-to 700Sq.Ft when running on the highest speed-setting coupled with multiple air-flow intakes and outlets for a high airflow-delivery-rate.

The Pure Antimicrobial True HEPA Filter helps to capture 99.97% of airborne-particles including germs. However, you can also get an optional HEPA-SILVER filter for more effective germ-removal.

A Pure Antimicrobial True HEPA Filter helps to capture 99.97% of dust-mites and other airborne-particles down to 0.3-microns in-order to keep your home dust-free.

It can trap and remove 99.97% of airborne-particles including pet-dander using the integrated Pure Antimicrobial True HEPA Filter.

Its Pure Antimicrobial True HEPA Filter can remove 99.97% of airborne-particles including pollen which is one of the major causes of allergies within people.

An optional Fresh Antimicrobial True HEPA Filter to trap and eliminate smoke within your home. However, this filter is sold separately and doesn’t come with this unit.

It can trap and eliminate mold-spores and other airborne-particles at an efficiency of 99.97% using an optional HEPA-Silver-filter that can be bought separately.

This unit captures 99.97% of allergens and other airborne particles down to 0.3-microns using the included Pure Antimicrobial True HEPA Filter.

Uses WhisperMax technology to ensure quiet-operation with about 39dBs at the lowest speed-setting and 55dBs at the highest speed-setting.

All the filters are easy to replace using simple tools and without needing any technical-help for installation.

It has a sleep-mode that operates at lowest speed-setting with lights-off coupled with extra-silence hence making it perfect for use in bedrooms.

It uses 56-watts at the highest speed-setting and 36-watts at the lowest speed-setting hence making it very energy efficient.

This unit is very energy efficient whereby it uses the same amount of electricity as a 50Watts light bulb.

It has button-control at the top-section which include; Timer, 4-speed-fan-speeds, Sleep/Power-mode, Lock-button and Filter-life-indicators

Features a Smart Filter Light indicator that will let you when it’s time to replace the pre-filter and HEPA-Pure Antimicrobial filters.

This device is very economical due to its low energy consumption whereby it uses the same amount of electricity as a 50Watt light-bulb.

This unit is ideal for use by people with asthma because it’s equipped with a Pure Antimicrobial True HEPA Filter that captures 99.97% of Allergens.

The Pure Antimicrobial True HEPA Filter should be replaced after 6-to-9 months for areas with poor air-quality & 9-to-12 months for areas with good air-quality.

Has a locking control-panel and child-safe vent guard which makes it safe for use in homes with kids and pets.

It does not produce ozone and it’s certified to be Ozone-free by California Air Resources Board (CARB).

Has a tower-shaped body with no sharp sides coupled with 14 plastic interchangeable front panels and a control-panel located at the top-section.

It has dimensions of; 25"H x 15"W x 8.5"D coupled with a metallic tower-shaped body with interchangeable front-panels and a bottom-stand.

It features a weight of 15-lbs (12.2kg) which makes it very lightweight and easy to carry around your house.