11 INSTALLATIONS, APPARATUS AND EQUIPMENT FOR SOLAR HEATING BUILDINGS AND WATER-NAMELY, WATER HEATERS, FURNACES AND HEAT EXCHANGERS AND COMBINATIONS THEREOF ALL UTILIZING SOLAR ENERGY AS THE ENERGY SOURCE
37 INSTALLATION AND REPAIR OF APPARATUS AND EQUIPMENT FOR SOLAR HEATING BUILDINGS AND WATER
42 SERVICE IN CONNECTION WITH DESIGNING INSTALLATIONS, SOLAR APPARATUS, AND SOLAR EQUIPMENT FOR SOLAR HEATING BUILDINGS AND WATER