Ultrafine Particles from 2 nm to 64 nm Generated by a Gas Stove and Electric Toaster Oven: Size-Resolved Coagulation, Deposition, and Emission Rates
Lance L. Wallace, Wang Fang, Cynthia H. Reed
NIST is studying ultrafine particles (UFP) between 2 nm and 64 nm produced by common indoor combustion and electric appliances. Experiments were conducted in an unoccupied manufactured house. UFP were measured with a scanning mobility particle sizer (SMPS) equipped with a nano-differential mobility analyzer (nano-DMA). UFP sources investigated in detail included a gas stove and electric toaster oven. For the gas stovetop burner alone (no pots), peak number concentrations occurred at a particle size of approximately 5.3 nm; concentrations <10 nm were about 10 times those >10 nm. These results suggest that UFP number concentrations previously reported for combustion appliances may be significantly underestimated. Because of increased Brownian motion for particles < 10 nm, coagulation becomes very important, accounting for 80% or more of the total losses due to coagulation, deposition and air exchange. Deposition rates and penetration coefficients were calculated using a recursive model relating indoor and outdoor measurements.
, Fang, W.
and Reed, C.
Ultrafine Particles from 2 nm to 64 nm Generated by a Gas Stove and Electric Toaster Oven: Size-Resolved Coagulation, Deposition, and Emission Rates, Indoor Air 2008, Copenhagen, 1, DK, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=861530
(Accessed December 2, 2023)