(under subclass 87) Shelter have; (a) means to elevate the temperature of the interior of the shelter, (b) means to artificially illuminate the shelter, or (c) means for supplying, removing or treating air for the shelter.
SEE OR SEARCH CLASS
126, Stoves and Furnaces, for heaters which do not form part of a combination with the shelter structure, particularly
314+, for stove-pipe thimbles not intended to act also as ventilators.
362, Illumination,
145, for illuminating means in a static structure.
