The radiator thermostat, invented by the founder of Danfoss, Mads Clausen, is celebrating its 75th birthday. In that time, Danfoss has produced about 350 million of them. In homes with hydronic radiators, they effectively create a zoned system by allowing the occupants to adjust the heat for each radiator to provide the desired comfort level in each room. This also results in substantial energy savings.
Danfoss www.danfoss.com.