Want to control your indoor air quality without doing a whole HVAC system upgrade or replacement? The only home filtration unit Matt Risinger recommends is the Field Controls Trio Portable, which is great for portable filtration. Research shows that fine particles are worse to breathe in than previously you thought, and the way to eliminate those is filtration. Risinger gives us a tour of the product in this video. This isn't really a whole-house solution, it's designed for no more than 1,000 feet. It has two levels of filtration, including a hospital-grade HEPA filter for fine contaminants. It also has a UV light on the top that kills viruses, mold and bacteria that come into contact with the light, and the plate on the bottom will also neutralize VOCs in your home. The filters and light last for a year. It's fairly energy efficient and relatively affordable for what it does, and runs fairly quiet, with two different speeds. Filtration machines from other stores really don't compare to the effectiveness of this unit. To buy, go to http://amzn.to/1WvHnTA.