Electric Booster Water Heaters are specifically designed to fit under counters and deliver 180ºF sanitizing rinse water for all stationary rack and conveyor type commercial dishwashers. They will raise preheated or cold water to 180ºF rinse temperature for compliance with UL Sanitation (NSF5) and all Federal, State, County and Local Health Department Sanitation Codes. Limited Warranty: 3-year tank