Evaluation of building design, construction, and performance for the control of radon in florida houses. Evaluation of radon resistant construction techniques in eight new houses. Final report, January 1993-April 1994

The report gives results of a study of eight houses throughout their construction in North Central Florida. Each house was built in compliance with the proposed radon resistant construction standard being developed by the Florida Department of Community Affairs. Each house was monitored for at least 6 days after construction, operating in three different heating, ventilation, and air-conditioning (HVAC) system configurations. Continuous measurements of indoor radon concentrations, house ventilation rates, across-slab differential pressures, and interzone differential pressures provided time-resolved radon entry rates and a performance index for passive radon barriers. Radon entry rates were found to be relatively constant throughout the measurement periods and for the different house operating conditions, implying that the passive radon barrier eliminates most convective entry.