EcoSense Mid-Efficiency 84 Direct Vent Indoor

Rheem Performance Plus® ultra low NOx, mid-efficiency tankless gas water heaters are designed to provide continuous hot water


  • .81 -.82 UEF with all copper heat exchanger
  • Intelligent electronic controls designed to increase energy efficiency and safety


  • Industry First! 0.26 GPM minimum flow rate, 0.40 GPM minimum activation flow rate
  • ECO200 for 3 bathroom homes*–9.5 gal./min. at 35°F rise max., 8.4 gal./min. at 45°F rise
  • ECO180 for 2-3 bathroom homes*–8.4 gal./min. at 35°F rise max., 6.6 gal./min. at 45°F rise
  • ECO150 for 1-2 bathroom homes*–6.4 gal./min. at 35°F rise max., 5.6 gal./min. at 45°F rise
  • Recirculation Pump Kit Ready - Quickly pairs to provide instant hot water at the tap
  • Exclusive! Water savings setting that can save homeowners up to 1,100 gallons of water per year
  • Low flow fixture compatible

Easy Installation & Service

  • 1/2" Gas line compatibility on every model
  • Exclusive! Maintenance Notice Setting that alerts homeowner when service is needed
  • Self-diagnostic system for easy installation and service
  • Digital display shows precise temperature setting and maintenance codes
  • Connects to Metal Fab. Inc., 3"/5" concentric venting without an adapter
  • 3"/5" concentric vent system with Integrated condensate collector


  • Hot start programming helps minimize fluctuation in water temperature, referred to as “cold water sandwich”, during periods of frequent on/off operation
  • Exclusive! - Guardian OFW™ overheat film wrap to protect the heat exchanger
  • EZ-Link™ cable connects two tankless units to operate as one
  • Built-in electric blower
  • Manifold up to six units with an optional MIC-6 manifold control board
  • Manifold up to 20 units with the optional MIC-185 plus the MICS-180 manifold control assembly

Low Emissions

  • Environmentally friendly Ultra Low NOx burner meets SCAQMD rule 1146.2 requirements 

High Altitude Compliant

  • High-altitude capability – up to 9,840 ft. elevation above sea level


  • Digital remote control and 10 ft. of thermostat wire included
  • Supplied with a 120 volt power cord (indoor models only)
  • Freeze protection to -30°F
  • Required manual gas isolation valve included

  • .81 - 82 Uniform Energy Factor (UEF) with all copper heat exchanger
  • Recirculation Pump Kit Ready
  • Designed for easy installation
  • 8.4 gal./min. at 45°F rise
  • 6.6 gal./min. at 45°F rise
  • 5.6 gal./min. at 45°F rise


EcoSense Mid-Efficiency 84 Direct Vent Indoor
Specification Sheet
Use and Care Information


12-year heat exchange warranty, 5-year limited warranty for tank and parts 1-year full in-home labor warranty

*See written warranty for complete details.

KwikComfort® Financing can help make your purchase even easier.
Rheem makes it easy to find a financing option that works for you! With many options and benefits available, KwikComfort Financing is the best way to get the home comfort you need without the wait.

  • Applications made easyWe'll help you avoid lengthy contracts, headaches and hassles.
  • Kwik credit decisionsYou'll get an answer to your application within minutes.
  • Fast credit for the futureFinance your Rheem equipment and anything you want to add later.
  • Reduced interest/fixed paymentsGet low interest and fixed monthly payments until the purchase is paid.
  • Minimum monthly paymentTake advantage of convenient monthly payments that fit your budget.
  • Deferred interest/no interestEnjoy interest-free payments as long as the balance is paid by the due date.