runs very well and as expected. Make sure you select the filter you desire at time of initial purchase. I would have preferred the activated charcoal/pet odor filter. So far I am quite happy with the purchase.
This we is our 4th Alen product. We bought 1 for my office & 3 for our house put in different rooms. We like the smart technology, quietness of the product, & customer service of this company.
The 75i was well-packaged and arrived in great shape. It’s quiet at the lower three speeds and only the Turbo mode might be distracting if it were to run at that speed for a long time. The AUTO mode adjusts to the air quality change from grilling in the kitchen by changing the speed of the fan. I like the multiple choices for replacement filters. The clean design is unobtrusive and looks fine in our great room.
Recently bought the 75i after already owning the 45i. This machine is awesome! Bought it because we moved and the master bedroom is extra large so warranted a larger air purifier. It is very quiet even on the medium output. Takes care of dust, pet dander and smoke which are my big triggers for asthma attacks. The wood grain front is aesthetically pleasing, the top vents ensure good circulation all over the space. The light off mode helps with sleep. Highly recommend it to everyone who needs an air purifier that does what it states. Price point is only slightly high making this 75i a great value.