Using the measurement data, whole-house UFP reduction effectiveness
due to the kitchen exhaust hood was evaluated for the burner
and oven tests. For each particle size bin ranging from 2 nm to
100 nm, the particle concentration was integrated over the emission
and decay period. The ratio of the integrated particle concentrations
between range hood on and off tests was then used to calculate the
whole-house particle reduction effectiveness for particles in the ith
size category (ei):