National Weatherization Assistance Program Impact Evaluation: Impact of Exhaust-Only Ventilation on Radon and Indoor Humidity–A Field Investigation

The study described here sought to assess the impact of exhaust-only ventilation on indoor radon and humidity in single-family homes that had been treated by the Weatherization Assistance Program (WAP). The study involved 18 homes in Colorado, Iowa, Minnesota and Ohio that had already been involved in a prior indoor-air-quality study, and had been shown to have moderately elevated radon levels.