1. In central heating, the heat may not be curbed and the system first heats the upper side of the room, afterwards cold air currents move towards lower parts of the room as illustrated in the animation and consumes the oxygen within the room. To heat the lower parts of the room at about 20°C consumes more energy.

2. In base heating through cable, the heat first starts cooling down from base to ceiling as illustrated in the animation. The heat may not be curbed in this system as well. This system is not welcomed due to its high installation and operation cost. 
3. UFO Infra-red Heating Systems unlike all other systems the heating moves from upwards to downwards. The system is exclusively directed to the area needed to be heated. In 27 seconds after the heater is switched on, it attains its full performance. This helps operating cost go down. The thermostat adjustment brings an additional saving. For instance, in a workshop assuming 1000 m2 closed-area, 5 m of ceiling height and with high ratio of heat dissipation, the installation cost is 20-50 times economical and that of operating is 10-30 cheaper.