The FE/DE can provide control of the flow velocity over a range from 2 cm/s to over 1.5 m/s. Temperature change is achieved by feedback controlled electrical heating elements with maximum temperatures exceeding 80oC depending on the flow velocity. Carbon monoxide, carbon dioxide, and hydrocarbon gas concentrations are independently controlled via electronic mass flow controllers. Black smoke is generated by a propane diffusion flame burner with smoke concentration controlled by fuel flow and the damper control from the burner to the FE/DE duct. Smokes from cotton smolder and wood pyrolysis represent smolder smoke sources. Nuisance sources include cooking activities, tobacco smoke, humidity and condensing water vapor, and dusts. Routine measurements at the detector location include light extinction, temperature, flow velocity, combustion gas concentrations, and water concentration. Detailed measurements of the aerosol number and mass concentration, and size distribution measurements are possible along with detailed 2-D velocity measurements around detector housings with a 2 component LDV.