Abstract: A thermoelectric module 2 constituting an exhaust heat recovery system has p-type semiconductors 3p and n-type semiconductors 3n which both constitute thermoelements 3 for converting a difference in temperature between high temperature side end portions 21 and low temperature side end portions 22 into electricity. The thermoelectric module 2 is constructed such that the n-type semiconductors 3n and the p-type semiconductors 3p are stacked alternately along a longitudinal direction of an exhaust pipe portion 20 with heat insulating support portions 41, 42 being interposed therebetween, and the n-type semiconductors 3n and the p-type semiconductors 3p are electrically connected to each other via electrode members at the high temperature side end portions 21 and the low temperature side end portions 22.

Abstract: A heater is adapted to provide heat for heating a room by effecting heat exchange in a heat section which is between combustion and ventilation sections. The heat exchange section comprises a rotary body positioned across the combustion and ventilation sections so as to rotate at that position. The rotary body has air flow passages extending in the same direction as the axis of rotation of the rotary body. The heater can effect heat exchange with an increased efficiency and also can prevent the interior of the room from being abnormally dried.