HouseFresh is a team indoor air quality experts whose ultimate goal is to help consumers avoid air purifiers, dehumidifiers, humidifiers and fans that don’t live up to the marketing hype. We are committed to finding the perfect device for improving our readers' indoor air quality for the long term. That’s why we buy every product we review with our own money and we test their performance in our own home environment under the exact same conditions, so we can compare different devices like for like.