# Rinnai REHPW heat pump water heaters add Wi-Fi and more flexible installation > **TL;DR:** Rinnai has launched the REHPW heat pump water heater series in three capacities (50, 65, and 80 gallons), adding Wi-Fi. The UEF is 3.75 for the 50-gallon model and 4.0 for the other two, with a first-hour rating of up to 91 gallons of hot water. Water connections sit on both the top and the side, and the air intake and exhaust are both on top, allowing side-by-side placement if Rinnai's requirements are met. The Central app supports scheduling and time-of-use electricity pricing, and the CTA-2045 AC Level 2 certification enables demand response. Pricing is available through installers. The… - Original: https://migovi.com/en/rinnai-rehpw-may-nuoc-nong-bom-nhiet-wifi/ - Author: [The Strongest Man on Earth](https://migovi.com/en/author/king/) - Published: 2026-11-14T12:19:42+07:00 - Categories: Home Appliances, News - Source: [Electrek (electric vehicles)](https://electrek.co/2026/11/13/rinnai-new-heat-pump-water-heaters-get-smarter-and-easier-to-install/) --- Rinnai has launched its REHPW heat pump water heater series with Wi-Fi, multiple plumbing configurations, and demand response certification, making installation and energy monitoring easier. ## What's new in the REHPW series Rinnai has introduced the REHPW heat pump water heater series in three capacities: 50, 65, and 80 gallons. The series builds on the existing REHP line, adding Wi-Fi and several details that make installation, monitoring, and maintenance more convenient. ![Rinnai REHPW electric heat pump water heater, a tall cylindrical tank unit](https://migovi.com/wp-content/uploads/2026/11/rinnai-rehpw-may-nuoc-nong-bom-nhiet-wifi-2.jpg) A heat pump pulls heat from the surrounding air and transfers it into the storage tank. This uses less electricity than a traditional resistance element. The unit burns no fuel on site, and the resulting emissions depend on the power grid's energy mix. ## Efficiency and operating specs Rinnai rates the Uniform Energy Factor (UEF) at 3.75 for the 50-gallon model and 4.0 for the two larger ones. A higher number means better efficiency under standardized testing. Actual bills still depend on electricity rates, hot water demand, and installation conditions. In the first hour, the unit delivers up to 91 gallons of hot water, depending on tank size. That figure includes both the water already stored and the water the unit heats during that hour. It's a notable spec when several people shower back to back. The heater offers five operating modes, a 4.5 kW backup heating element, and a variable-speed fan to reduce noise. The heat pump keeps working at air temperatures as low as 37 °F. ## More flexible installation ![Three Rinnai REHPW units of different sizes shown side by side](https://migovi.com/wp-content/uploads/2026/11/rinnai-rehpw-may-nuoc-nong-bom-nhiet-wifi-3.jpg) The most practical upgrade is in installation. Water connections are on both the top and the side, so installers can more easily tie into existing plumbing. The air intake and exhaust are both on top of the unit, so it can be placed right next to a wall if Rinnai's requirements are met. The company also offers optional air ducting kits for tight spaces. The unit has a carrying handle for moving it into position, and the air filter slides out from the side for cleaning. The 50- and 80-gallon models gain a third tank temperature sensor to better control hot water output. ## Smart controls and certifications Wi-Fi enables remote monitoring and control. Rinnai's Central app already supports the REHPW series, including scheduling and tools that take advantage of time-of-use electricity pricing to manage consumption. The unit is also certified to CTA-2045 AC Level 2 for demand response, which lets utility programs communicate with it and adjust how much power it uses. According to Rinnai, this certification may help homeowners qualify for local or state demand response incentives, depending on the program. The series is Energy Star certified, meets NEEA Tier 4, and complies with California's Title 24, including JA13. It carries a 10-year warranty on the tank and other parts, plus 1 year on labor. Rinnai doesn't list pricing and instead directs buyers to installers for quotes. Upfront costs, as well as any local incentives that could offset them, mean you'll want a specific quote. For reference, the earlier REHP series sells on Amazon for around 2,000 USD. ✒️ MIGOVI VIEWPOINT For Vietnamese readers, the value of the REHPW lies in the approach more than the specific product. Heat pumps cut the electricity used for hot water, while Wi-Fi and demand response turn a water heater into a device that can coordinate with electricity pricing. However, the certifications and incentives above are tied to the US market, so check availability and grid conditions carefully before considering a purchase. Source: [Electrek (electric vehicles)](https://electrek.co/2026/11/13/rinnai-new-heat-pump-water-heaters-get-smarter-and-easier-to-install/)