Rinnai has launched a new REHPW series of electric heat-pump water heaters in 50-, 65- and 80-gallon sizes, adding wifi controls and more installation options to a design meant to cut the electricity used for hot water, Electrek reported. Heat-pump water heaters pull heat from the surrounding air and move it into the tank, which uses less electricity than a conventional resistance element and involves no fuel combustion at the appliance, though emissions still depend on the grid. Rinnai lists a Uniform Energy Factor of 3.75 for the 50-gallon model and 4.0 for the two larger versions. The lineup can deliver up to 91 gallons of hot water in the first hour, depending on tank size, a rating that includes stored water and what the unit can heat in that hour. There are five operating modes, 4.5-kilowatt backup elements, and a variable-speed fan; the heat pump can run with ambient air as low as 37 degrees Fahrenheit.
Practical installation changes are a large part of the refresh, which builds on the existing REHP lineup. Water connections are on both the top and the side, and the air intake and exhaust are on top, allowing zero side clearance where Rinnai's instructions permit. An optional ducting kit is offered for tighter spaces, carrying handles are included, and the air filter slides out horizontally. A third tank temperature sensor has been added on the 50- and 80-gallon models. Wifi enables remote monitoring through Rinnai's updated Central app, including scheduling and tools for time-of-use electricity rates. The units carry CTA-2045 AC Level 2 certification for demand response, which Rinnai says can help qualify homeowners for utility rebates where programs exist. The series is Energy Star certified, meets NEEA Tier 4 requirements, and complies with California Title 24, including JA13, according to the company. The warranty is listed as 10 years for the tank and other parts and one year for labor.
Rinnai directs buyers to an installer for pricing. Electrek noted that the earlier REHP series has recently hovered around the $2,000 mark on Amazon, a reference point, not a confirmed REHPW street price. Rebate value depends on the local utility. The efficiency numbers are standardized test ratings, not a promise of a particular bill savings in every house.
The verified news is a new REHPW lineup with published tank sizes, UEF ratings, a 37-degree operating floor, wifi and demand-response certification. It is not a Tesla product, and it is not a nationwide advertised price.