Rheem Manufacturing Co.

Rheem® Maximus™

The high efficiency gas water heater designed to give homeowners all the hot water they want.  This combined power vent (PV) / power direct vent (PDV) water heater is perfect for larger homes with 3+ bathrooms, and for  those  who  want  to  save  money  and  never  worry  about running out of hot water. Rheem® Maximus™ is a win-win. A simple, easy to install tank that fits in tight spaces with flexible venting options and 0″ clearance requirements on sides for Plumbers. And a smart solution that provides continuous hot water without a big price tag for homeowners. Control temperature, adjust mode, view energy usage and know immediately about leaks and service alerts from anywhere with built-in EcoNet Wi-Fi technology and the EcoNet App.  Exclusive technology provides tank health monitoring, diagnostics, performance updates and alerts via both mobile device and full-color LCD display. Schedule run times for your recirculation pump (sold separately) through the EcoNet App* to save energy and enjoy instant hot water. MaxMode™ gives homeowners the hot water they need in a pinch —making continuous hot water from a tank possible. Exclusive LeakSense™ Built-in Leak Detection System with available LeakGuard™ Auto Water Shut-off Valve for maximum protection and the Hot Water Availability Indicator to help avoid cold showers giving homeowners an unmatched hot water experience.

Judges’ Remarks

“The Maximus™ is a high-efficiency gas water heater that shows consumers their energy and hot water usage, a unique addition for a gas water heater that helps customers proactively manage their energy bills and hot water use.”





Connected Water Heating


Honorable Mention


Available 2022.

Contact Information

Customer Service, Warranty, Parts

Plumbing Support Team

EcoNet® Technical Support

Technical Service
800.HEATER3 (800.432.8373)

Rheem Manufacturing

Product Specifications

CEE Tier 2 and ENERGY STAR Certified

UEF: 0.90

Rated Storage Volume: 50 gallons

First Hour Rating (FHR): 192 gallons

Connected Protocols: Wi-Fi. OpenADR 2.0 available when connected to an EcoNet® thermostat

Platform Compatibility: Amazon Alexa and Google Home

Warranty: 12-year limited replacement warranty

Energy Management Features: Vacation or away mode, energy consumption reporting or energy meters, MaxMode™ for limited time high demand, geofencing

Load Management Features: None