DCHP-1 Online
sweat-house 
n. a hut, wigwam, etc. used for taking sweat-baths (def. 1), originally a practice of Indians.
See also: sweat-bath (def. 1 and 2) sweating bath sweat lodge
- 1887 (1888) We have passed many of these sweat houses at various places. . . .
- 1935 Facing the entrance, at the distance of a few yards, was a domed sweat-house for the candidate's purification.
- 1957 Build a sweat-house by making a dome shaped tee-pee of willow hoops, large enough for a person to crouch down inside, preferably beside a creek or river. . . .
- 1887 (1888) We have passed many of these sweat houses at various places. . . .