Hoyt Clarke Hottel (1903 – 18 August 1998) was a professor in the department of Chemical Engineering at the Massachusetts Institute of Technology (MIT). He was an expert on energy, radiant heat transfer, fire, fuels and combustion.
In 1984, he wrote the often quoted words "A case can be made for fire being, next to the life processes, the most complex of phenomena to understand".
Hottel received his first degree, BSc, in chemistry from the Indiana University in 1922. He then joined MIT and received the SM in chemical engineering in 1924. He was named an assistant professor in 1928, associate professor in 1931 and full professor in 1941. In 1965 he was named the first Carbon P. Dubbs Professor of Chemical Engineering. He became professor emeritus in 1968.
Hottel was in charge of solar energy research program at MIT from the late 1930s to the mid-1960s. This involved research on non-biological uses of solar energy by humanity