The first ever recorded heating system in the world was created by the Romans and was called the 'Hypocaust'. Romans were the first culture to have heating systems to warm their individual homes as far back as 350 BC. The hypocaust system sent heat from a furnace through pipes placed in the floor and walls. The level of heat was controlled based on how much wood was fed to the fire in the furnace. By today's standard this is not an efficient system, but back then it was a wonderful invention!