## 2 Materials and Methods
### Methods  
One common method for the subjective assessment and evaluation of thermal comfort across different body areas is a seven-point thermal sensation scale, similar to the one presented in ISO 7730, which ranges from \"cold\" to \"hot\". The questionnaire presented by [PERSON] and [PERSON] [8] was used. When the participants were introduced to the samples, they were informed that each model differed in seat design, making it unique. No other details or differences were provided. Each participant sat on each sample for two working days according to a predetermined schedule. The first day was used to adjust the chair to the participant and accustom the participant to the chair. On the second day, after at least six hours of sitting on a particular sample, the participants filled out a questionnaire. The participants were not asked to sit according to predetermined instructions, but to behave naturally and normally at their workplace. Participants sat in their usual sitting positions (Figure 1) and completed the thermal comfort assessment questionnaire only once per chair. Figure 1: Typical sitting positions that users took during the experiment, (**left**) upright sitting (e.g., administrative work), (**right**) inclined sitting (e.g., developer work) (drawings by [PERSON]). \begin{table}
\begin{tabular}{c c c c c c} \hline
**Sample BS** & **Sample IS** & **Sample KS** & **Sample LS** & **Sample MA** & **Sample RS** \\ \hline \multicolumn{6}{c}{Backrests types and cover materials} \\ \hline Breathable mesh & Breathable mesh & Breathable mesh & PUR 3046, & Breathable mesh & Breathable mesh \\
100\% Polyester & 100\% Polyester & 100\% Polyester & 100\% Polyester & 100\% Polyester & 100\% Polyester \\ \hline \end{tabular} Note: *** = upper layer material, ** = middle layer material, * = lower layer material.  
\end{table} 
Table 2: _Cont._Measurements were carried out in three different air-conditioned spaces at a mean temperature of 23.4 \({}^{\circ}\)C and relative humidity of 34.2% throughout the trial period. During the experiment, the temperature and humidity of each space were measured. The participants recorded the temperature and %RH values when they completed the questionnaire for a particular chair for the particular work space. Table 3 shows the combined overall temperature and humidity data for all work spaces at the time of the thermal assessment of each chair sample. The questionnaire (Table 4) on thermal comfort consisted of four sections: \begin{tabular}{l l l l l l l l l l l l}  & & **BS** & & **IS** & & **KS** & & **LS** & & **MA** & & **RS** \\  & \({}^{\circ}\)**C** & **\%RH** & \({}^{\circ}\)**C** & **\%RH** & \({}^{\circ}\)**C** & **\%RH** & \({}^{\circ}\)**C** & **\%RH** & \({}^{\circ}\)**C** & **\%RH** & \({}^{\circ}\)**C** & **\%RH** \\ \hline Avg & 23.2 & 34.5 & 23.3 & 34.9 & 23.5 & 34.7 & 23.5 & 33.6 & 23.5 & 33.7 & 23.4 & 33.6 \\ StD & 1.50 & 8.68 & 1.53 & 8.58 & 1.85 & 8.66 & 1.59 & 7.92 & 1.59 & 7.89 & 1.50 & 7.83 \\ Min & 20.0 & 20.0 & 20.0 & 20.0 & 20.0 & 17.0 & 20.0 & 20.0 & 21.0 & 20.0 & 21.0 \\ Max & \(2^{\prime}\).3 & 55.0 & 27.9 & 88.0 & 32.0 & 52.0 & 27.1 & 49.0 & 29.8 & 50.0 & 26.9 & 50.0 \\ \end{tabular}   
Avg = Average value; StD = Standard deviation; Min, Max = Minimum and maximum measured values. \begin{tabular}{l l l l l l l l l l l l l}  & &  
The overall average values of the thermal and moisture indicators for all the chairs are shown in Figure 3. In other words, each column presents the mean value of all chairs for a particular thermal indicator (T1-T15). A slightly higher average warmth rating was observed on the buttocks (T8, 4.48) and under the thighs (T1, 4.28), but it was also slightly lower than the average on the back (T7, 3.98). The overall average score of the responses was 4.12 (Figure 3, purple line). The mean values of the subjective assessments of the thermal sensation of the seating according to the chair models are shown in Figure 4. This chart shows the inter-relationships of the mean values of each indicator's assessment for each chair.