Indoor temperature is one of the main characteristics for indoor environment. It can be controlled and observed with many different schemes depending on the building and its HVAC system. The indoor temperature gives an affect to hew human responses- thermal comfort, perceived air quality, sick building syndrome symptoms and performance at work. In this study the main focus is on the performance at office that is effected by temperature. There are ncluded studies that had used objective indicators of performance which are relevant in offices and office type work- text processing, simple calculations, length of telephone customer service time, and total handling time per customer for call-center workers. There is less information about the effect in the wotk in low temperatures, more information is about work in higher temeperatures. There is no information about the industrial work. There is calculated from all studies the percentage of performance change (increase or decrease of the productivity) per every degree increase in temperature. The main result is that performance increases in temperature about to 21-22 oC, and decreases with temperature that exceeds 23-24 oC. The highest productivity is at temperature of around 22 oC. For example, at the temperature of 30 oC the performance is only 91.1% of the maximum- in average, the performance/ productivity decreases 2% by every degree.