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Rheem EcoSense

Model # ECO200XLN3

Internet # 203163882

Store SKU # 1000013339

9.5 GPM 199,900 BTU Ultra Low NOx Natural Gas Mid Efficiency Outdoor Tankless Gas Water Heater

This item has been discontinued.
The Home Depot no longer carries this specific product.

$1118.39 / each

  • Consumer reviewed to deliver hot water in 8 seconds
  • No drop in temperature or pressure from multiple source use
  • Reviewed as an easy to install and reliable product with no leaks


Model # ECO200XLN3

Internet # 203163882

Store SKU # 1000013339

Store SO SKU # 1000067376

The Rheem EcoSense ECO200XLN3 Outdoor Natural Gas Tankless Water Heater can provide up to 9.5 GPM at a 35° temperature rise. The 199,900 BTU Natural Gas Tankless Water Heater is designed to supply continuous hot water for up to 3 bathrooms at the same time. It heats water only when it's needed and has a 0.82 energy factor. This compact heater exceeds the requirements for many utility rebate programs and also qualifies for the Energy Star program. It comes with a remote digital thermostat that can be installed in almost any convenient area of the house. This heater's outdoor design requires no additional venting and features freeze protection to -30°F. This model can be used at elevations up to 9,840 ft. above sea level. Please click the "More Info" tab and then "Specifications" to view the Rheem Brochure Guide which will help you in your buying decision to ensure that you purchase the right tankless water heater model for your household needs.

  • Outdoor tankless gas water heaters require no additional venting
  • A 9.5 GPM tankless water heater at a 35° temperature rise can provide enough hot water to supply a 3 bathroom home
  • Tankless gas water heaters heat water on demand, saving energy compared to many standard gas tank-type water heaters
  • 12-year limited warranty on heat exchanger and 5-year limited warranty on parts
  • 0.82 energy factor meets or exceeds minimum energy efficiency standards
  • Remote digital display shows precise temperature setting and maintenance codes
  • Ability to link two like units together for high demand applications with the EZ-link cable (sold separately)
  • Ability to link two like units together for high demand applications with the EZ-link cable
  • Commercial conversion kits available for commercial applications

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Vent diameter (in.) 
Water Connection Size (in.) 
Automatic Shut-off 
Finish Family 
Flow Rate @ 35 F Rise (gallons/min) 
9.5 gal (US)/min 
Flow Rate @ 45 F Rise (gallons/min) 
7.4 gal (US)/min 
Fuel Type 
Gas Connection Size 
Gas Product Type 
Commercial & Residential 
Gas Type 
Natural Gas 
Gas Type 
Natural Gas 
Maximum Temperature (F) 
Minimum Activation Rate (gpm) 
Minimum Temperature (F) 
Pilot Light 
Product Weight (lb.) 
54 lb 
Residential/Commercial/industrial Use 
Residential or commercial 
Total BTU 
199900 Btu 
Vent Type 
Single Wall 
Water Connection Location 
Water Heater Features 
Ultra LoNox 
Warranty / Certifications
Certifications and Listings 
1-UL Listed,CSA Listed 
ENERGY STAR Certified 
Labor Warranty 
1 Year 
Part Warranty 
5 Year 


Rated 4.4 out of 5 by 12 reviewers.
Rated 5.0 out of 5.0 by Rheem 9.5 gpm Had a 40 gallon water heater on the second floor of my two storie home. Installed this on the first floor outside, so there was a lot of work just to run the gas, power, and water. The unit howerver was very easy to install. I have read other post on here about people not being able to buy the "Rheem tankless water heater valve kit" and having to order it. Homedepot does carry in the store the "Watts tankless water heater valve kit" watts is a very old and very well known plumping part company this kit is a must have to install this unit. Also the beat way to mount this is with Uni strut. And I have to give a shout out to Dasiy who works the plumbing dept. at Homedepot Burbank this lady knows her stuff and was a huge help. November 19, 2014
Rated 5.0 out of 5.0 by Outstanding Unit! UPS delievered my new tankless water heater at 2:37 this afternoon and we had it installed and running perfectly by 6:25. And that included removal of my old Bosch unit and a trip to my local hardware store to pick up a few fittings. The unit delivers hot water in 8 seconds, and I have run it continuously now for 15 minutes in 2 showers and the kitchen sink with no drop in temperature or pressure. Being thoroughly familiar with tankless heaters - 6 years - I can overwhemingly endorse this product! April 16, 2013
Rated 2.0 out of 5.0 by Not a reliable choice After a year or so the remote controls no longer work. I am on the third $100 dollar remote control. It gets a disconnected error. Internet says that the cause of the error is the wire between the remote and heater, the remote or the computer board in the water heater. The computer board is almost $400. No guarantee that the thing will hang together for more than a few months. As the service expert says, a tank-less water heater is a computer that sometimes heats water. The older Rheem tank-less water heaters had a horrible reputation for control connection errors. I had the heater installed by the best plumber in the county as part of a major kitchen remodel. They used the Rheem as the best heater. A friend of mine just finished a major remodel and the same plumber said that they no longer install tankless heaters, since they were unreliable and offer minimal energy savings. My heater may be aberration, and Rheem may have fixed all of the problems. To use hot water we have to flip the breaker off and wait five minutes. We flip the breaker back on and fiddle with the remote until it connects. We run to the shower and turn on the hot water. As long as the water is running, we have hot water. If we turn it off we may have hot water for minutes or hours. I am going to replace the heater with a standard tank type water heater that has a nice standard pilot light and no electric connection. The pilot light is not a waste of energy, since the energy is transferred to the tank. By the way, no tank-less water heater will work during a power outage. June 29, 2015
Rated 5.0 out of 5.0 by SUPERB TANKLESS WATER HEATER I have had the 199,900 BTU Tankless Water Heater for almost a year now and it was a great choice. It is located outside, so I did not have to worry about exhaust. I have had 3 showers going in the household with no problems. I would recommend this unit to anyone!! February 27, 2013
Rated 5.0 out of 5.0 by Better than I expected I have been completely satisfied with this water heater. My previous experience with tankless left me wanting more, but this one doesn't. Hot water is delivered fast and consistent and I no longer have to worry about my children using all of my hot water. March 12, 2013
Rated 5.0 out of 5.0 by High Quality Workmanship and Operation Purchased Rheem ECO200XN3 efficient tankless hot water heater. Unit has extremely high quality workmanship. Quick shipping from Home Depot kept my construction schedule on time. Installation was relativity easy but requires strict adherence to local codes. The remote controller feature is a nice touch. Start up was easy. This unit will pay for itself in less than two years. June 5, 2014
Rated 5.0 out of 5.0 by Pretty nice These units have really become cost effective....packaged well....installs fairly easily....home owners would have trouble plumbing the unit....the nipple attachments are a little week...too much force will break them....instructions point this out, yet..... April 30, 2015
Rated 5.0 out of 5.0 by I wish I had it installed sooner Easy installation and temperature control. Plenty of hot water when needed. June 3, 2013
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