The bellow is a mechanical device for creating a jet of air. Around 3000 BC hand operated bellows were used for metal smelting (bronze). The first evidence of iron smelting is around 930 BC. Though early man did not need to get their heating and cooking fires up to the temperatures needed for smelting they did discover that fireplace bellows made fire building easier. Fireplace bellows were used early on to create an airstream to blow ashes out of the fireplace when cleaning.