Evolution of Heating Technology

The first heater in human history was essentially a controlled fire, created when early

humans learned to gather dry wood, strike stones to produce sparks, and protect the

flames using rocks arranged in a circular pit to prevent the fire from spreading; over time this simple

fire evolved into clay and stone fireplaces built inside homes, where people shaped a dedicated hearth

with a hole in the roof for smoke to escape, and as civilizations advanced,

metalworkers in the 1700s began casting iron into closed stoves that trapped heat more

efficiently, eventually leading to the invention of the modern electric heater in 1882,

when engineers discovered that passing electricity through a metal coil such as nichrome or tungsten made