Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Viessmann is a German energy company headquartered in Allendorf, Waldeck-Frankenberg, Hesse. Its main focus is on the product of equipment to produce and control energy. It is also a major winter sports sponsor. Founded in 1917, the chair is Dr. Martin Viessmann. 8,600 people are employed with annual sales of € 1.7 billion. Their main focus in on boilers for oil and natural gas though they have focused during the 2000s on renewable energy, including biomass and solar energy. Viessmann also does other Heating, Ventilation, and Air Conditioning (HVAC) for commercial, industrial, and residential purposes. Viessamnn UK offer extensive product training to obtain extended warranties on the domestic appliance range. UK installer Paul Spence of Leeds commented on how benficial the training and warranty extension is for the end user.

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