The Collaborative International Dictionary of English v.0.48:

Thermantidote \Ther*man"ti*dote\, n. [Gr. ? heat + E. antidote.]
   A device for circulating and cooling the air, consisting
   essentially of a kind of roasting fan fitted in a window and
   incased in wet tatties. [India]

         Will you bring me to book on the mountains, or where
         the thermantidotes play?                 --Kipling.
   [Webster 1913 Suppl.]