The published excel files contain the experimental data presented in the master thesis of Andrea Giordano entitled "CFD Simulation of an Aerosol Mixing Chamber" available at https://infoscience.epfl.ch/record/280815?ln=en The data are presented in the thesis figs. 33 to 36 The nomenclature is as follows (details see in the thesis) Lenght: normal: standard lenght of mixing tube 0.75 m short: shortened version of the mixing tube 0.57 m shortest: further shortened version of the mixing tube 0.35 m Flow Rates: 4020: 40 lpm from top, 20 lpm through mixing jets, standard half: 20 lpm from top, 10 lpm through mixing jets one to one: 10 lpm from top, 10 lpm through mixing jets jets Material: salt: atomized from solution; geo. mean of particles app. 80 nm dust: Arizon A2 test dust, geo. mean of particles app. 400 nm 1micr. PSL: certified PSL particles monodosperse, diamter 900 nm Each files contains a sheet with the results and a sheet with the CPC raw data