Rheem EcoSense 8.4 GPM 180,000 BTU Ultra LoNox Natural Gas Mid Efficiency Outdoor Tankless Gas Water Heater-ECO180XLN3 - The Home Depot

Rheem EcoSense

Model # ECO180XLN3

Internet # 203213758

Store SKU # 486311

8.4 GPM 180,000 BTU Ultra LoNox Natural Gas Mid Efficiency Outdoor Tankless Gas Water Heater

Rheem EcoSense 8.4 GPM 180,000 BTU Ultra LoNox Natural Gas Mid Efficiency Outdoor Tankless Gas Water Heater

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

$947.85 / each
  • No standing pilot means less wasted energy
  • Compact space saving design frees up valuable square footage
  • Commercial conversion kits available for commercial applications


Model # ECO180XLN3

Internet # 203213758

Store SKU # 486311

Store SO SKU # 1000067409

The Rheem EcoSense ECO180XLN3 Outdoor Natural Gas Tankless Water Heater can provide up to 8.4 Gallons per minute at a 35 degree temperature rise. The 180,000 BTU Natural Gas Tankless Water Heater is designed to supply continuous hot water for up to 2 or 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 degrees 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 8.4 GPM tankless water heater at a 35 degree temperature rise can provide enough hot water to supply a 2-3 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
  • Energy Star qualified to meet or exceed federal guidelines for energy efficiency
  • Ability to link two like units together for high demand applications with the EZ-Link cable (sold separately)
  • Note: product may vary by store

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.


Assembled Depth (in.)  8.875 in  Assembled Height (in.)  23.625 in 
Assembled Width (in.)  13.875 in  Product Depth (in.)  8.875 
Product Height (in.)  23.625  Product Width (in.)  13.875 
Vent diameter (in.)  0.0  Water Connection Size (in.)  0.75 
Automatic Shut-off  Yes  Finish Family  Gray 
Flow Rate @ 35 F Rise (gallons/min)  8.4 gal (US)/min  Flow Rate @ 45 F Rise (gallons/min)  6.6 gal (US)/min 
Fuel Type  Gas  Gas Connection Size  0.75 
Gas Product Type  Commercial & Residential  Gas Type  Natural Gas 
Gas Type  Natural Gas  Indoor/Outdoor  Outdoor 
Maximum Temperature (F)  140.0  Minimum Activation Rate (gpm)  .40 
Minimum Temperature (F)  85.0 °F  Pilot Light  No 
Point-Of-Use  No  Product Weight (lb.)  54 lb 
Residential/Commercial/industrial Use  Residential or commercial  Returnable  90-Day 
Total BTU  180000 Btu  Vent Type  Single Wall 
Water Connection Location  Bottom  Water Heater Features  Ultra LoNox 
Warranty / Certifications
Certifications and Listings  1-UL Listed,CSA Listed  ENERGY STAR Certified  Yes 
Labor Warranty  1 Year  Part Warranty  5 Year 


Rated 4.0 out of 5 by 6 reviewers.
Rated 5.0 out of 5.0 by Great investment Love it I had it installed because I was already having a bunch of plumbing work done, but it was pretty easy, it does require 120V electrical supply and wiring of the remote. I wanted to gain space in my laundry room and putting the heater outside makes so much sense, no fumes, duct work and if there is ever a leak no damage to your house. I do live in sunny south Florida so freezing is never a worry:) February 25, 2015
Rated 5.0 out of 5.0 by Better than a Bosch-Pro Tankless I have had a Bosch GWH-635-ESO-N for years and wondered what was so good about a tankless water heater. Took a long time to get hot water to the destination, and had cold spots in the hot water line. Started having error codes and would have to reset all of the time, which meant going outside to the unit. My new Rheem has a control panel in the house if I ever need to reset it, I am using much less water because I turn on the hot water tap and get hot water like it is a regular tank unit. I do not have to heat up my hot water prior to plugging in my portable dishwasher and then keep the water running in another faucet so that it doesn't error out and shut the hot water off. I would recommend this product to anyone that wants to go tankless but was worried about wasting so much water because it sends the hot water to the tap so quickly that I am sure my water bill will go down. October 19, 2013
Rated 5.0 out of 5.0 by Wonderful Love it, still had hot water after 3 people finished showering. Arrived before they predicted. Need to buy cut-off valves for hot & cold water, pressure relief valve, cpvc with elbows for making turn and running lines and small amount of electrical wire to hook up the thermostat. Did it ourselves!!!! Pollie April 16, 2013
Rated 5.0 out of 5.0 by Natural gas tankless Excellent product; installation did take a plumber and electrician, had to redo some pipes and i'm not "handy" at all so hired people to install. Quality and Value; completely satisfied with the product too many cool features and space saving to list; plus excellent rebates for the product!! Highly recommend (location Phoenix, AZ) January 19, 2014
Rated 3.0 out of 5.0 by The tempeture is too low for good hot water. Need to have an factory tech to reset the tempeture to 140 degree. The need to have a Factory Technician reset the tempeture to 140 degree is a lot of trouble. It takes a long time to get the water hot. February 18, 2014
2 >>


Standard Shipping includes delivery by small parcel service. Processing time varies by product.

Orders for this item may be expedited for an additional fee.

Other Delivery Options:

Express and Expedited shipping options are also available. Estimated arrival times are available in checkout.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.