| See | 22 33 30.23 for residential, collector-to-tank, solar-electric domestic water heaters. 23 56 00 for solar energy heating equipment. 23 82 36 for finned-tube radiation heaters. 23 82 39 for unit heaters. 26 31 00 for photovoltaic collectors. 42 13 26 for industrial solar radiation heat exchangers. 48 14 00 for solar energy electrical power generation equipment. |