The MRCOOL MTWH04540ET is a 40-gallon electric tank water heater designed to provide reliable hot water for residential applications. It uses electric heating elements to warm water stored inside the insulated tank, maintaining a ready supply for household use. This water heater is used as part of residential plumbing and water-heating systems rather than conventional HVAC equipment. ... https://www.partshnc.com/mrcool-electric-tank-water-heater-mtwh04540et