| See | 22 33 30.26 for residential, collector-to-tank, heat-exchanger-coil, solar-electric domestic water heaters. 23 56 00 for solar energy heating equipment. 23 57 00 for heat exchangers for HVAC. 26 31 00 for photovoltaic collectors. 42 12 23 for solar process heaters. 48 14 00 for solar energy electrical power generation equipment. |