en عمومى General پژوهشي Research <div dir="ltr" style="text-align: justify;"></div> <div style="text-align: justify;"><strong>Background:</strong> One way to achieve a standard heating, ventilating, and air conditioning system with maximum satisfaction is to use a thermal index to identify and determine the thermal comfort of people. In this study we intend to evaluate thermal comfort based on PMV-PPD (Predicted Mean Vote/Predicted Percentage Dissatisfied) model in workers of screening center for COVID-19. <strong>Methods:</strong> The study period was from March 1 to October 31, 2020. In this study, we used the ISO 7730 model to determinate PMV-PPD index. PMV index&nbsp; was used to determine thermal comfort at different scales in Birjand city with arid and hot climate. All data were analyzed &nbsp;using R software (version 3.3.0) and IBM SPSS statistics softwares. <strong>Results:</strong> The maximum and minimum recorded physical PMV values in the study period were observed in June as (2.09 &plusmn; 0.03) and March as (-1.27 &plusmn; 0.14), respectively. The amplitude of the thermal sense in the study period was varied between slightly cool (-1.5) and warm (+2.5). The PPD in spring was 40% which indicated slightly warm to hot condition. <strong>Conclusions:</strong> The October was the only month during the study in which thermal stress was in comfort or neutral thermal condition. &nbsp;Our results suggest that thermal comfort has dimensions and indices which are helpful in managing energy consumption.</div> Thermal comfort, Predicted mean vote, Predicted percentage dissatisfied, Screening center, COVID-19 1094 1099 http://aoh.ssu.ac.ir/browse.php?a_code=A-10-121-2&slc_lang=en&sid=1 Danial Mohammadi danialmohammadi92@gmail.com 0000-0003-4371-1219 Yes Occupational Health Research Center, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran 2- Department of Occupational Health, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran; danialmohammadi92@gmail.com Simin Nasrabadi siminnasrabadi92@gmail.com No School of Public Health, Birjand University of Medical Sciences, Birjand, Iran; siminnasrabadi92@gmail.com