Rheem Mid Efficiency Tankless Water Heater – EcoNet Included

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  • .82 UEF -US
  • With all -copper heat exchanger
  • 11,000 – 199,900 BTU max.
  • 9.5 gal./min. at 35° F rise max.
  • 7.4 gal./min. at 45° F rise max
Financing Available


Rheem Mid Efficiency Tankless Water Heater is a series of ultra low NOx, mid-efficiency tankless gas water heaters designed for continuous hot water.

Rheem Mid Efficiency Tankless Water Heater Features:


  • .82 UEF -US
  • .82 EF – Canada
  • With all -copper heat exchanger


  • EcoNet Enabled – all Tankless products from 2010 to present can connect to EcoNet mobile app via Tankless EcoNet Accessory Kit (REWRA630TWH)
  • Exclusive! Water Savings Setting – upon activation, this setting can save homeowners up to 1,100 gallons of water per year by reducing flow at the tap unitl set temperature is achieved (optional)
  • Industry Best! Low Flow Activation – Minimum flow rate of .26 GPM and minimum activation flow rate of .40 GPM ensures the user will receive hot water even in low demand situations
  • Recirculation Pump Kit-Ready – Providing faster hot water at the tap and savings of up to 12,000 gallons water/year

Easy Installation and Service

  • 1/2″ Gas line compatibility
  • Exclusive! Maintenance Notice Setting – Alerts homeowner, after 500 hours of use, to call for service check (optional)
  • 3″/5″ concentric vent system with Integrated condensate collector
  • Connects to Metal Fab. Inc., 3″/5″ concentric venting without an adapter


  • For higher demand applications, accessories available to link multiple units in a load-sharing system

High Altitude Compliant

  • High-altitude capability – up to 8,400 ft. elevation above sea level

Low Emissions

  • Environmentally Friendly ultra low NOx burner meets SCAQMD rule 1146.2 requirements


  • Exclusive! Guardian OFW™overheat film wrap – prevents dangerous temperatures and provides industry best side-to-side clearance of 1/2 inch
  • Exclusive! Hot Start Programming – Minimizes cold water bursts by staying in ready-fire state for back-to-back hot water needs


  • Digital remote control and 10 ft. of thermostat wire included
  • Requires 120V power supply  (indoor models only)
  • Industry Best! Freeze protection to -30°F
  • Maximum water temperature is 140°F. For higher temperature applications, upgrade kits are available


  • 12-Year heat exchanger – residential,
  • 5-year heat exchanger – commercial,
  • 5-year parts and 1-year labor

Energy Efficiency in Water Heaters
What’s the Difference Between High Efficiency (EF) Ratings and the New Uniform Energy Factor (UEF)? If you’ve ever researched water heaters before a purchase, then you’ve probably compared high efficiency, mid-efficiency and standard efficiency information. To help consumers in their water heater purchase decisions, the Department of Energy has developed new industry standards. Beginning, June 12, 2017, EF ratings have been replaced with the new industry standard for measuring energy efficiency in water heaters called, Uniform Energy Factor (UEF).

The new UEF standard affects more than just the efficiency number itself. Adjustments in new DOE testing procedures now impact water heating performance stats associated with the amount of hot water produced in a real-world situation to the length of typical showers. Examples of Performance Factors Impacted by UEF include:

  • First Hour Rating / First Hour Delivery (FHR / FHD) – The amount of hot water a waterheater can provide in the first hour of operation. Updated testing procedures result ina more accurate representation of performance.
  • Capacity – Previously, capacity was expressed as a single number that didn’t fullyrepresent the actual storage capacity of the water heater. With the UEF regulations,the DOE now requires manufacturers to inform buyers of both a water heaters’nominal capacity by gallon grouping (40, 50, 60 gallon, etc.), as well as the actualstorage capacity (35, 37, 42, 58 gallon).
  • Estimated Energy Cost Savings – The updated testing procedures enable a moreaccurate approximation of what it will cost to run a particular water heater.

Additional information