ASA University announces the update to its product knowledge course Domestic Water Heaters is complete and available in both book and online formats. The course gives employees the basic knowledge needed to discuss the specifications for different types of water heaters and to understand which type of water heater is best for a given installation. Definitions of common industry terms, descriptions of the major types of water heaters and information about similarities and differences in water heaters are provided. This updated course now includes information regarding the 2015 DOE standards for water heater efficiency and is mobile and tablet compatible. Domestic Water Heaters is part of the popular ASA University ProductPro series. For more information and to order, visit