Energy-efficient performance: Energy Star Certified. Extracts heat from ambient air to deliver consistent hot water with zero emissions and a high Uniform Energy Factor (UEF) of 3.75, reducing energy costs High first-hour delivery: Provides up to 73 gallons of hot water in the first hour—ideal for households of 3–4 people with high demand Demand-Response Enabled: Saves you money by communicating with local utilities to reduce energy usage during peak hours Durable & reliable design: Built with a glass-lined steel tank, UL and NSF certified, and backed by a 10-year residential warranty on tank and parts Easy installation & compatibility: Operates on 240V / 30A, with standard 3/4" MNPT inlet/outlet connections and R134a refrigerant for efficient heat transfer. Zero clearance required on top, back, and sides The REHP Electric residential heat pump water heater delivers consistent hot water by extracting heat from the surrounding air and converting it to hot water while producing zero emissionsUpgrade your home’s water heating system with the Rinnai REHP50 Electric Heat Pump Water Heater, a high-efficiency, eco-friendly solution designed for modern residential needs. With a 50-gallon tank capacity, this unit uses advanced heat pump technology to extract warmth from ambient air, delivering consistent hot water while minimizing energy consumption and environmental impact. Engineered for performance, the REHP50 boasts a Uniform Energy Factor (UEF) of 3.75, ensuring superior energy savings compared to traditional electric water heaters. Its first-hour hot water delivery of 73 gallons makes it ideal for households with high hot water demand, while the glass-lined steel tank ensures long-lasting durability. The REHP50 communicates to your local utility companies via a CTA-2045 communication port to lower energy usage during peak grid traffic, lowering your energy bill and saving you money. Certified by Energy Star, UL, AHRI, NSF, and NEEA, this unit meets rigorous safety and efficiency standards. With a 10-year residential warranty on tank and parts, plus 1-year labor coverage, you can trust Rinnai’s commitment to quality and reliability. This product is eligible for federal tax credits under IRA Section 45L when installed in qualifying energy-efficient homes. Whether you're replacing an outdated system or upgrading to a more sustainable solution, the Rinnai REHP50 saves you money while deliverying powerful, whisper-quiet performance, low emissions, and peace of mind.