CHECK PEDRO DELACABRA PLAYLISTS FOR MORE SECRET LIFE OF MACHINES

https://youtu.be/9y08yBdoFsI

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At first, Roman houses simply had a fire in the middle of the room (the Latin for hearth is focus). But they probably had trouble with smoke as the Latin for living room is atrium (from ater meaning black). By about 400AD the Romans had perfected a form of central heating. The fire was lit outside in a furnace with hot air ducts under the floors and in the walls.

Accompanying Sheet:

http://www.secretlifeofmachines.com/i...

Please see http://www.secretlifeofmachines.com for more information

Thanks to Tim Hunkin the creator for allowing these excellent videos to be freely distributed on-line.