Central Heating - The Secret Life of Machines - Video/DVD

Central Heating - 25 minutes Hunkin begins by trying to make fire with two sticks. Cartoon shows the early problems of burning wood inside a room. Ideas included heated walls. Demo shows the use of a chimney and how it draws smoke up. Use of steam to heat conservatories in 18th century is shown. Steam and scale problems in pipes is explained. Lifesize model of house system - demonstration. Joining copper pipes illustrated. Efficiency of heat conversion - wood fired boiler. Oil fired boiler (see pic). Gas and demo of bunsen burner drawing in air, and good combustion. Gas boilers - The Ascot system. Balanced flues. Night storage heaters - principle of operation shown. Thermostats - demo of bi-metal strip. Timers for setting heating. Insulation - double glazing. Special notes

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	The Secret Life of Machines has been on TV around the world - USA, Australia, UK, Britain.... These award winning television programmes show how machines work. Using analogies, illustrations, working models and extraordinary experiments, Tim Hunkin 'lifts the bonnet' on the machines we take for granted. His enthusiasm for his subject is infectious. Excellent education and technology resources.
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