Figure 6
From: Fine particulate matter in indoor cultural heritage: a literature review
Summary of particle fluxes indoors. The possible inlets and outlets of particles. Q M is a main inlet, such as an open window, Q L the leakage, Q F the filtered inlet, Q R an internal filtered recirculation, E the internal emission, R the re-suspension, D ijk the deposition to walls, floor, and ceiling, Cn0 and C n the outdoor and indoor concentrations of every particle size fraction, and V the room volume. Both Q F and Q R are subject to certain efficiency.