Rheem Performance 18 kW Self-Modulating 3.5GPM Electric Tankless WaterHeaterFa. Rheem Performance Tankless Electric Water Heaters help reduce energy usage, save on energy costs, and provide the comfort and convenience of continuous hot water on demand. Rheem whole-home models are a perfect match for installations in small spaces and no venting is required. Energy and cost savings: heats water only when it is needed for savings of up to 50% on water heating costs when used in a point-of-use application or 34% when used as a whole-home solution. Instant, continuous hot water: instantly provides ample hot water for up to 2 showers and 2 faucets (review selection guide below to confirm this water heater will provide the hot water needed based on your geographic location).Space savings: small, compact design fits perfectly in tight places like under cabinets and sinks. Easy to adjust: electronic temperature control adjustable in 1° increments from 80°-140°F with easy-to-read display (Celsius and Fahrenheit compatible). Easy installation: compatible with 3/4 in. Water connectors for flex hose installation and no venting or T and P valve required for Easy installation (professional installation recommended). Easy to maintain: durable, easy-to-replace heating elements. A reliable hot water solution from Rheem, the global leader in water heating. Requires 2 x 40 Amp Double Pole Breakers. California residents see Prop 65 WARNINGS. The item "Rheem Performance 18 kW Self-Modulating 3.5GPM Electric Tankless WaterHeaterFac" is in sale since Friday, July 26, 2019. This item is in the category "Home & Garden\Home Improvement\Heating, Cooling & Air\Water Heaters\Tankless Water Heaters". The seller is "bigzesty5050big" and is located in Diberville, Mississippi. This item can be shipped to United States.