George Oscar Löf (13 December 1913 – 12 October 2009)[1] was an American engineer and inventor who was best known for his contributions to solar energy research.
"Nobody played a more enduring role in the 20th century solar house movement than George Löf.
He earned an undergraduate degree from the University of Denver in 1935,[3] and a PhD in chemical engineering from Massachusetts Institute of Technology in 1940.
[5] In 1943, Löf designed an early flat-plate solar heating unit and installed it on the roof of his house in Boulder, Colorado.
[6] In 1957, he built a house in the Cherry Hills neighborhood of Denver which used a novel method to collect and store solar heat.