As of March 2015, Amtrol makes indirect-fired hot water heaters for commercial use, sold under the name Amtrol Premier Commercial Hot Water Makers. The units can store abundant amounts of water and have large heat exchangers to meet the hot water needs of heavy commercial and luxury residential systems.
Amtrol commercial hot water heaters are made in the USA with premium 316L stainless steel water reservoirs and multiple-pass coils to improve performance. The units have removable heat exchangers for easy service and cleaning and their energy-saving insulation loses less than 0.5 degrees Fahrenheit per hour.
All models can be fitted with optional double-wall coils. A dual-coil option with twin heat exchangers is also available.