## 2 Methods
### IAQ and Airflow Measurement Campaign
To this end, the following devices, which are summarized in Tables 2 and 3, were implemented:  
* Two NODE sensors of the Airvisual brand measure CO\({}_{2}\), RH, T and PM\({}_{2.5}\) (Low1-1, Low1-2);
* Two GRIMM G1.108 record PM\({}_{2.5}\), PM\({}_{10}\) and size distribution in number between 0.3 and 20 \(\upmu\)m (Lab2-1, Lab2-2);
* Two MET_ONE (HHPC 6+) register size distribution in number between 0.3 and 10 \(\upmu\)m (Int3-1, Int3-2);
* Two NEMO record simultaneously CO\({}_{2}\), TVOC, and formaldehyde concentrations, as well as T and RH. It should be mentioned that no measurements of formaldehyde and TVOC were made because the instrument failed during C1 in BR1 (Int4);
* Eight WOHLER CDL 210 sensors measure CO\({}_{2}\), T, and RH (Low5). During C2, there was no WOHLER in BR1 and BR2. Thus, data from NEMO and NODE were used. According to the French PROMEVENT protocol [23; 38; 39], airflows were measured at each ventilation component (exhaust and supply) of the dwelling, using a cone with a checkered thermal anemometer KIMO DBM (Figure 2), which had been calibrated less than 1 year earlier. We corrected the airflow using the calibration certificate. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Room** & **Campaign** & **CO\({}_{2}\)** & **RH** & **T** & **Particle Numbers** & **PM\({}_{2.5}\)** & **Formaldehyde** & **TVOC** \\ \hline \hline Bedroom 1 & C1 & Low5-1 & Low5-1 & Low5-1 & / & Low1-1 & / & / \\ \cline{2-8} (BR1) & C2 & Int4-1 & Int4-1 & Int4-1 & / & Low1-1 & Int4-1 & Int4-1 \\ \hline Bedroom 2 & C1 & Low5-2 & Low5-2 & Low5-2 & / & Low1-2 & / & / \\ \cline{2-8} (BR2) & C2 & Low1-2 & Low1-2 & Low1-2 & / & Low1-2 & / & / \\ \hline Bedroom 3 & C1 & Low5-3 & Low5-3 & Low5-3 & / & / & / & / \\ \cline{2-8} (BR3) & C2 & Low5-3 & Low1-2 & Low1-2 & / & / & / & / \\ \hline Bedroom 4 & C1 & Low5-4 & Low5-4 & Low5-4 & Int3-1 & / & / & / \\ \cline{2-8} (BR4) & C2 & Low5-4 & Low5-4 & Low5-4 & Int3-1 & / & / & / \\ \hline Kitchen & C1 & Low5-5 & Low5-5 & Low5-5 & Lab2-1 & Lab2-1 & Int4-2 & Int4-2 \\ \cline{2-8}  & C2 & Low5-5 & Low5-5 & Low5-5 & Lab2-1 & Lab2-1 & Int4-2 & Int4-2 \\ \hline Living room & C1 & Low5-6 & Low5-6 & Low5-6 & Lab2-2 & Lab2-2 & / & / \\ \cline{2-8} Bathroom 2 & C2 & Low5-6 & Low5-6 & Lab2-2 & Lab2-2 & / & / \\ \hline \hline \end{tabular}
\begin{tabular}{c c c c c c c c} \hline \hline
**Room** & **C1** & **Low5-7** & **Low5-7** & **Low5-7** & / & / & / & / \\ \hline \hline \multirow{2}{*}{Outdoor} & C1 & Low5-8 & Low5-8 & Low5-8 & Int3-2 & / & / & / \\ \cline{2-8}  & C2 & Low5-8 & Low5-8 & Low5-8 & Int3-2 & / & / & / \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Devices of measurement in each room. Figure 2: Cone with checkered thermal anemometer. \begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline  
A survey and time budget activity records were also used in order to analyze the measurements correctly, as the occupants have a major influence on the indoor environment. The occupant survey included questions about each room: How many occupants are there in each room at a given time? Which products are used/which activities take place? What schedules are followed? How and for how long are the windows and doors open? When is the high-speed ventilation used? Meteorological conditions such as wind speed, wind direction, atmospheric pressure, and outside temperature were recorded with a 10 min time step using a Delta Ohm HD2003 station including a three-axis ultrasonic anemometer.