We have a two level 2500 sq. ft. home in Napa and we purchased 2 of these to clear our home of the smoke from the ‘Camp Fire’ that destroyed the city of Paradise California.

The AQI was somewhere between 150 and just over 200 for over a week. These accurately changed from Purple, to Red, to Orange during that time and our house was very comfortable with air quality. Now that the air quality improved consistently to an AQI well under 50, these two filters remain on Blue or Green throughout the day.

Since my wife if terribly allergic to our dog and our cat, we’re going to continue running them throughout the day as long as windows stay closed due to rain or cold weather.

We’re very pleased with the look, quality, and customer service. We would recommend the 75i.