73573851
Dec 16, 1985
May 5, 1987
DOMESTIC HEATING [ AND VENTILATING ] EQUIPMENT, NAMELY, GAS [ AND OIL ] BURNERS, GAS [ AND ELECTRIC ] WATER HEATERS, [ FURNACES, ] HEATING ELEMENTS, [ HEAT PUMPS, BLOWERS, ] HEAT EXCHANGERS, GAS ROOM HEATERS, HOT WATER HEATERS AND BOILERS
Environmental Control Apparatus