| See | 22 10 00 for plumbing piping and pumps. 22 34 00 for fuel-fired domestic water heaters. 22 35 00 for domestic water heat exchangers. 23 56 00 for solar energy heating equipment. 26 31 00 for photovoltaic collectors. 42 12 23 for solar process heaters. 42 13 26 for industrial solar radiation heat exchangers. 48 14 00 for solar energy electrical power generation equipment. |