Although in recent years underfloor heating is common heating system in many European countries for residential buildings, it’s not the same situation in industrial or public premises such as warehouses, exhibition halls, factories, shops. There are several theoretical advantages to use heating system with pipes embedded in concrete floor such as uniform temperature profile, low air speeds, sufficient operative temperature could be achieved with relatively low air temperature thanks to radiant heating and by using existing thermal energy, e. g. from production processes, can additionally decrease energy expenses to almost zero in the best. Low temperature in heating mode and minimum temperature difference between supply and return allows to increase coeficient of perfomance (COP) of heat pump or efficiency of a gas condensation boiler. All of above mentioned advantages lead to more energy efficient heating system, despite that lot of premises instead of utilizing water based industrial underfloor system still uses hot air heating systems with water-air heat exchangers. Case study has been made in existing exhibition hall with installed underfloor heating system seven years ago, vertical temperature differences has been measured, air temperature is kept at about 18C in heating season and ceiling high varies from 8m to 12m. The same measurements been made in warehouse equipped with warm air heaters with water-air heat exchangers. Heat loss due to non uniform temperature distribution was calculated for both cases. Also attention has been given to calculate operative temperature (air and mean radiant temperature) for underfloor heating system and warm air system. Operative temperature can be significantly influenced when using radiant heating, because of higher floor temperature that means that air temperature can be kept at lower level to achieve the same comfort level like using warm air system which leads to more energy efficient heating system comparing to air heating system.