The model demonstration house described in this paper was designed to optimize occupant health by minimizing indoor air pollution. This was accomplished by the use of three primary principles: ELIMINATION, SEPARATION, AND VENm.ATION.1 Pollutant source strength reduction has come to be regarded as the most effective method of reducing indoor pollution. This is often easily achieved by ELIMINATING potentially polluting materials wherever possible, and using more benign low outgassing materials instead.