Long recognized in Europe and Asia as a major energy- and space-saving solution, tankless water heaters have begun to make significant inroads in the North American market. By 2024, North America is expected to command more than 45% of the global tankless water heater market, according to Goldstein Research.

As more and more plumbers begin to install this technology, which can save their customers up to 40% on energy costs when compared with storage-tank options, the need for proper installation guidelines will become greater than ever. Installers accustomed to tank-only installs will need to understand the following aspects of tankless water heater installations.