Heater burning fuel and vaporizing water.
Heater (Hot in OSX) is the opposite of Cooler. It burns things and makes water-based materials turn into Steam. It melts meltable objects, and it can also be mixed and poured.
Uses[]
Heater is a key component in electricity. CoolHeat can melt and burn but not evaporate Water. Liquid Hot (made by pressing esc + H + esc) never burns out, but also does not have the fire animation.