AIRDOCTOR 3500 Air Purifier for Home and Large Rooms Up to 1274 sq. ft. 2x/hour | UltraHEPA, Carbon, VOC Filters and Air Quality Sensor. Captures Particles 100x Smaller Than HEPA (AirDoctor 3500)

The AIRDOCTOR 3500i SMART Air Purifier has received mixed feedback from customers. Some users have found the unit to be quite noisy, even on the lowest setting, which made it difficult to sleep. Additionally, there were complaints about having to pay for return shipping when returning the product due to the noise issue. On the positive side, the purifier is said to effectively capture smoke particles and odors, and has received praise for its ability to react quickly to changing environmental conditions. The built-in ionizer, while optional, has been commended for its revitalizing effect on the air. The unit is also capable of filtering particles down to the nano-scale. One user mentioned that the purifier effectively improved the air quality in their home after returning from an area affected by wildfires. However, there were also comments about the high price of the unit and a desire for the lights to be dimmable.