Electric, residential. Space-saving design for installation in limited spaces. Side mounted water connections for easier installation. Extra durable, high-temp dip tube meets the most stringent plumbing codes. Furnished with standard 120 vac, single phase wiring. Single 1440 W stainless-steel heating element, top water connections, and convenient 3-prong plug. 2.5 gallon tank. Stainless Steel. Size 9-3/4 diameter x 14 Height. UL Listed, NAECA Requirement.