AC350 True HEPA Air Purifier 1 True HEPA Filter Captures 99.97% of Contaminants1 Activated Carbon Prefilter Captures OdorsWhole Room Air Purification - Up To 220 Sq. Ft.3 Speed SettingsFilter Change IndicatorElectronic Push Button ControlsCompact Size Fits Easily in Most Spaces You'll breathe easier knowing that the True HEPA collection removes 99.97% of airborne contaminants in your home.  HEPA filtration traps dust, pollen, pet dander, smoke and more while the carbon prefilter adsorbs odors and captures larger particles like hair. See How It Works. An in-depth look at TrueHEPA. It's What's On The Inside. Which Is Right For You? How Clean Is Clean? True HEPA filters have a capture rate of 99.97%.  However, units with a True HEPA filter inside aren't necessarily guaranteed to emit 99.97% clean air like a Vornado does.  Gaps, poorly sealed filter housings and excessive air velocity all can reduce the effectiveness of competitors' products.  Vornado also uses whole room purification technology to circulate and purify all the air in the room, not just the air near the unit.

Most air purifiers mention their Clean Air Delivery Rate (CADR), which is a measure of the unit’s airflow times the filtration efficiency in air purifiers. As two variables are used to calculate the CADR, an increase in one can offset a decrease in the other—but still result in an higher CADR rate. The CADR is meant to be impartial and is advertised as the the best way to compare air purifiers. enso aroma diffuser air purifier humidifierHowever, it can be misleading.oransi max hepa air purifier Why is CADR a misleading comparison for air purifiers?air purifier 17005 The CADR is biased towards air purifiers that circulate a higher rate of semi-clean air, rather than air purifiers that can clean the air well, but circulate air at a lower rate.

Greater filtration efficiency can slow a units airflow, allowing for air purifiers with lower efficiency, but faster air circulation to have a higher CADR. While airflow rate is important to consider when researching air purifiers, higher filtration efficiency will give you the greatest benefit with more purified air. The Problem with CADR Testing This may be caused by the test used to calculate CADR. In this test, a unit is placed in an enclosed room that is then filled with airborne contaminants. After running the unit for 20 minutes, the air quality is then tested and the CADR is calculated. This is a relatively small amount of time for most air purifiers, as many higher-end air purifiers require at least an hour to circulate air and improve air quality, especially if the filtration efficiency is high. Therefore, the air purifiers that circulate more air tend to have higher CADR, despite the fact they removed a smaller amount of contaminants. In order to score well on this test, many manufactures have designed their air purifiers to circulate a lot of air quickly, filtering only the larger contaminants.

This can mean companies who compete based on their CADR usually do not have other filter offerings other than standard HEPA filtration. Adding filter options with carbon, odor removal or silver-ion technology will reduce their air purifiers’ CADR score, making them less competitive with other lower-end units. Alen Air Purifiers and CADR CADR also fails to indicate a product's ability to capture and remove bad odors, bacteria, or volatile organic compounds (VOCs). Alen Air Purifiers successfully removes these contaminants from your indoor air with versatile filter options, which the CADR does not take into account. For this reason, Alen Air Purifiers are not rated by the CADR system. We believe a higher filtration efficiency is more important than a higher airflow rate, giving you the greatest benefit from our air purifiers. Our purpose is to help our customers Live Better by removing an effective amount of airborne particles and contaminants from your indoor air, not to receive a higher CADR.

Are you interested in learning more about Alen Air Purifiers or CADR? Visit our Product Advisor or call an Alen Air Quality Specialist 800-630-2396 to learn more.Ladakh 350 Air Purifier Designed for India, in India. Proven effectiveness in Delhi, the world's worst metropolis for air quality. Crafted out of steel. Packed with an H13 HEPA filter. Introducing our new powerful air purifiers! The Smart Air Ladakh 350 Air Purifier will get rid of air pollutants and allergens inside your house or office. It comes with an H13 HEPA filter, which is rated to remove 99.95% of 0.3 micron particles. The compact Ladakh 350 is rated to be effective in rooms up to 350 sq-ft in area with 10 ft ceilings. It has a CADR (smoke) rating of 231 and an Air Changes per Hour rating of 5 (meaning it will cycle the air in a 350 sq-ft room 5 times in an hour through the filter). It's powerful and quiet. The Ladakh 350 makes 53 dB of noise on High, 42 dB on Medium and 32 dB on Low.

We've also thrown in some convenience with a remote control and timer function. If you live in Delhi, come by our workspace in Lado Sarai to check out the unit in action. After you place your order, we'll notify you when your delivery will be taking place (right now, 5 weeks). CE 2047 according to PED (97/23/EC). Certified by Regal Quality Registrars, Inc, UK. Made in India with imported HEPA material. Delivery in 5 weeks. The Smart Air Ladakh 350 Air Purifier eliminates PM 2.5 and PM 10 particles, along with allergens, from the air you breathe effectively, efficiently, and for an affordable price! up to 350 sq-ft 3 Stage: Pre-filter, Activated Carbon, H13 HEPA filter 720 hours (3 months at 12 hrs/day) Air Changes per Hour: High 53 dB, Medium 42 dB, Low 32 dB Flat buttons and remote control 3 speeds: High, Medium, Low 3 settings: 1 hr, 3 hr, 8 hr Energy Consumption (on High): 12 x 11 x 12 inches The Ladakh 350 Air Purifier uses the following filters: