HEATWAVE

HEATING, VENTILATING AND AIR CONDITIONING APPARATUS, MORE SPECIFICALLY, GAS [ AND OIL ] FIRED FORCED AIR FURNACES, ELECTRIC FURNACES, [ WALL HEATERS, FLOOR FURNACES, AIR CONDITIONING FURNACES; ] AIR CONDITIONERS AND BLOWER EVAPORATOR UNITS, HEAT PUMPS AND SIMILAR APPARATUS FOR RESIDENTIAL, COMMERCIAL, AND INDUSTRIAL UTILIZATION