The Multi Tech A4000 The Multi-Tech A4000 takes air purification to a higher level by adding a user selected automation mode for adjusting fan speed based on the level of pollutants discovered by its on-board sensors. The two sensors - one for odors and the other for pollutant levels - provide data for adjusting the fan speed to match the requirements at any given time. The Multi Tech A4000 is great for rooms up to 450 square feet and uses six proven cleaning technologies to purify your air. Beginning with a washable pre-filter to remove damaging larger particles, the Multi Tech A4000 also incorporates an activated carbon filter, a true HEPA filter (rated to remove 99% of the dust and allergens), a cold catalyst filter,an anti-bacterial non-woven filter, and a negative ion generator.
The Multi Tech A4000 At A Glance
	Summary: The Multi Tech A4000 brings air purification for 450 square foot rooms to a new level by adjusting the fan speed to match requirements as determined by its two on-board sensors when operating in automatic mode. This in turn extends the lifespan of the product and its filters by not maximizing the use of these resources when not needed. Beginning with its quiet, powerful 106 CFM (45 db at the highest fan setting), the Multi Tech A4000 spells quality and performance from the ground up. As air is drawn into the Multi Tech A4000, a washable pre-filter removes most larger particles, protecting downstream filters in the process. The air then passes through an activated carbon filter where chemicals, gasses, odors, and cigarette smoke meet their match and continues on through a true HEPA filter (rated 99% effective at 0.3 microns) where dust, dust mites, mold, fungi, allergens, and bacteria are removed or neutralized. Next, the air passes through a cold catalyst filter, removing additional pollutants including chemicals and various micro-organisms, and then travels on through the cold catalyst filter where micro-organisms are destroyed. Finally, the air exits the unit bathed in trillions of negative ions which seek out and destroy additional air borne particles and bacteria in the surrounding air. The Multi-Tech A4000 uses only 45 watts (at its highest setting), has a LED display, weighs 11.25 pounds, and is 20 inches high, 14 inches wide, and 7.5 inches deep.
	Noise Level: The powerful 106 CFM fan is very quiet, emitting less than 45db at its highest setting.
	Maintenance: Maintenance of the Multi-Tech A4000 consists of washing the pre-filter as necessary and replacing the filter pack (roughly $35) twice a year (more in overly polluted areas).
	Size: The Multi-Tech A4000 measures 20” high, 14” wide, and 7.5” deep.
	Guarantee/Warrantee: The Multi-Tech A4000 carries an unconditional 30-day, no questions asked return policy, and a 3 year warrantee on parts and labor should it need servicing.
Why We Like This Unit: TheMulti-Tech A4000’s automation mode is unique in its class. In addition, the multi filter pack make it a snap to service the unit while its washable pre-filter, a quiet fan, and a sleek design, make the Multi-Tech A4000 a serious contender for most rooms up to 450 square feet.
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