<p> Multi-zone measurement of particle concentrations in a HVAC building with massive printer emissions: influence of human occupation and particle transport indoors </p><p>Sofia Eirini Chatoutsidou 1,2, Norbert Serfozo2, Thodoros Glytsos2 and Mihalis Lazaridis2*</p><p>1Norwegian Institute for Air Research (NILU), Instituttveien 18, 2007 Kjeller, Norway 2School of Environmental Engineering, Technical University of Crete, Polytechneioupolis, 73100 Chania, Greece</p><p>Fig. 1S Particle number size distribution (dN/dlogDp) of peak concentration in PR during cleaning of the corridor</p><p>Fig. 2S Indoor particle number concentration in PR and outdoor particle number concentration as measured for 48 h on 10-11/10/2015. The office was closed and no activity took place during the measurement</p><p>Table 1S Averaged total removal rate and suspended PN<0.1 concentration originating from other areas estimated for each workday</p><p>18/05 19/05 20/05 21/05 22/05 25/05</p><p>(h-1) 9.98 7.26 12.84 10.29 8.08 7.21</p><p>(cm-3) 3,751 2,536 1,936 3,478 4,769 3,296</p><p>Table 2S Parameters of linear regression between emission rates (S) and indoor PN <0.1 concentration for PR N (·10-8) R2 p-value 18/05 45 9.0 3,804 0.91 <0.05 19/05 46 9.8 2,764 0.82 <0.05 20/05 43 6.4 2,010 0.87 <0.05 21/05 51 6.1 4,084 0.95 <0.05 22/05 42 9.1 4,879 0.87 <0.05 25/05 14 10.2 3,368 0.81 <0.05 average 8.4 3,485 st. deviation 1.8 1,011 Table 3S Parameters of linear regression for mass concentration data for offices A1 and B2 N R2 p-value A1 PR 723 0.86 1.12 0.74 <0.05 outdoor 726 0.99 2.88 0.47 <0.05 B2 PR 411 1.20 3.31 0.69 <0.05 outdoor 415 1.04 9.04 0.36 <0.05</p><p>Table 4S Parameters of linear regression for number concentration between PR and A1, B1, B2 respectively N R2 p-value A1 351 0.54 350 0.63 <0.05 B1 450 0.21 1976 0.19 <0.05 B2 344 0.44 664 0.61 <0.05</p>