LEVOIT LV H135 VS. Germguardian AC4020

It features a High Performance Allergen Filter (HEPA-filter) that helps to reduce airborne-pollutants down to 0.3-microns.

Features a Carbon filter layer (Charcoal-filter) that traps and eliminates cigarette-odors and other household odors caused by pets and cooking.

Is designed for use in smaller rooms with sizes of up-to 60sq.ft. Likewise, this device takes in polluted-air at the back and then gives-off clean-air at the front.

Uses UV light technology with Titanium Dioxide to kill airborne germs, bacteria and viruses.

Uses a True HEPA filter to trap and eliminate 99.97% of airborne-pollutants including; dust-mites and household-dust.

It still uses a High Performance Allergen Filter (HEPA) to trap and reduce pet-dander down to 0.3-microns at an efficiency of 99.97%.

It can effectively remove pollen from your house using a High Performance Allergen Filter (HEPA).

It uses a Carbon filter layer to capture large-particles and reduce smoke caused by cooking and smoking.

UV-light technology works with Titanium Dioxide to kill and prevent the growth mold-spores within your home.

Its High Performance Allergen Filter (HEPA) helps capture common allergens within air in-order to keep your home-environment fresh and healthy.

It generates a soft noise at minimum fan-speed and a modest audible noise at maximum fan-speed.

Replacing the filter is very easy since you just have to remove the back-panel and then change its all-in-one filter system.

It uses less than 30-watts on the highest speed-setting and less than 5-watts on the low speed-setting. it also uses a voltage of 120V at 60Hz.

This unit is energy-star certified because its power-consumption is minimal at low fan-speed and slightly higher at maximum fan-speed.

It features a simple-to-use, round front dial knob control for adjusting to 3 fan-speeds coupled with a filter-change-indicator.

An integrated filter change indicator will help to remind you when to change the filters.

This unit won't have a substantial impact on your electricity-bills even if you run it 24×7 because of its low power-consumption.

This unit is very affordable yet bits equipped with some great features.

It features a High Performance Allergen Filter (HEPA) that reduces on dust and allergens down to 0.3-microns making it ideal for use by asthmatic-people.

Only one single filter needs to be replaced every 6-8 months depending on the use of the device or depending on the air-quality of your area.

It can effectively purify room-air without producing harmful-ozone. This mainly because it uses advanced technologies like; UV-light.

It features a compact and lightweight speaker-like design with a round front dial knob control. It also features a air-inlets at the back and air-outlets at the front.

Has a dimension of: 7.2"L x 5.8"W x 9"H coupled with a compact multi-colour body made of durable ABS-Plastic.

4.5-pounds and this makes it very lightweight and perfect for use when traveling.