Germguardian AC9200fl VS. Germguardian Ac4100

Its True HEPA filter relieves allergies by capturing 99.97% of dust and allergens as small as 0.3-microns in size.

It also features a programmable-timer that can be set between 2, 4 or 6 hours of operation before the unit shuts down.

An Activated granular carbon filter traps and eliminates cigarette-odor and other household-odors from cooking and pets.

It’s designed for use within small-to-medium sized rooms of up-to 378Sq.ft. Likewise, this unit can filter and circulate room-air for over 4X per-hour.

Uses an ionizer option and UV-C light technology with Titanium-Dioxide to trap and eliminate airborne germs, bacteria and viruses.

The True HEPA filter eliminates 99.97% of dust-mites while the integrated Pre-filter can capture large dust-particles within air.

It still uses a True HEPA Filter to capture 99.97% of pet-dander and other airborne-pollutants down to 0.3-microns.

Uses a True HEPA Filter to destroy 99.97% of pollen and other airborne-allergens down to 0.3-microns.

Its Activated granular carbon filter can eliminate cigarette-smoke and cooking smoke.

This unit uses a TrueHEPA-Filter and UV-C light technology with Titanium-Dioxide to eliminate 99.97% of mold-spores.

The ionizer emits negative-ions that attract microscopic-allergens to form larger particles that can be easily trapped by the TrueHEPA-filter.

It has 3-speeds whereby the lowest-speed (speed-1) provides ultra-quiet operation making this device perfect for use in bedrooms.

You just have to take-off the front-panel by pushing on a clip and then pull to reveal the filters. This makes filter-replacement very easy and quick.

Features an ultra-quiet sleep-mode that runs on lowest speed setting (speed-1) making this device perfect for use in bedrooms.

It uses about 40-watts on the highest speed-setting and 4-watts at the lowest speed.

Has an energy star rating for low power-consumption. In fact, it meets strict energy efficiency guidelines set by the US EPA.

Its control-panel at the top has several digital-controls which include; fan-speed, UV-C on/off button, filter-replacement-indicator, Timer and a Power-button.

This unit features a filter-change-indicator that will blink to alert you that it’s time to replace the filters.

This device is very economical because it consumes lesser power and also features a timer-option that helps conserve energy when you’re not home.

It’s a bit affordable yet equipped with some of the best technologies in air-purification.

It’s very ideal for allergy and asthma sufferers because it provides cleaner and fresher air to breathe coupled with relief from allergy symptoms.

All its filters should be replaced every 6-to-8 months depending on the use of the unit.

It doesn't emit harmful- ozone because its UV-C technology converts it back to oxygen.

Has a contemporary, speaker-like tower design with a display-control-panel at the top-handle section, air-inlets at the back-top and air-outlets on the sides coupled with a stand at the bottom?

Has a dimension of: 9.8"W x 17"L x 27"H coupled with a compact, black tower-shaped body made of durable ABS-plastic with a built-in carrying-handle and stand.

20.3-pounds and this makes a bit heavy to carry and transport.