Answer :
Answer: put several heating devices (such as heaters) and let them have use at maximum temperature for several minutes (or hours if you want it really hot)
Step-by-step explanation: the heaters are available to bring warmth to the room by collecting the air particles in the room and heating them up then releasing it causing it to pile up amounts and heating up the entire room.
-4.3Celsius plus 18Deg.Celsius.