My daughter is allergic to dust, and mold so I had an electronic filtration system installed when our hvac system was installed. I also use the filtrete filters to catch any additional dust that gets through the larger system. The filtrete filters do a great job of filtering the air particulates that would cause flare-ups for my daughter. I used to purchase the 'cheap' filters, but can see a difference with the filtrete filters. I would recommend them to anyone who has home air quality concerns.