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Rheem EcoSense

Model # ECO180XLP3

Internet # 203251988

8.4 GPM Liquid Propane Gas Mid Efficiency Outdoor Tankless Gas Water Heater

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

$749.99 /each

  • Same-day installation in most areas. Call 1-855-400-2552 by noon.




Model # ECO180XLP3

Internet # 203251988

Store SO SKU # 1000067446

The Rheem EcoSense ECO180XLP3 Outdoor Liquid Propane Gas Tankless Water Heater can provide up to 8.4 Gallons per minute at a 35 degree temperature rise. The 180,000 BTU Liquid Propane 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
  • 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) 
Flow Rate @ 45 F Rise (gallons/min) 
Flow Rate @ 55 F Rise (gallons/min) 
Flow Rate @ 65 F Rise (gallons/min) 
Fuel Type 
Gas Connection Size 
Gas Product Type 
Commercial & Residential 
Gas Type 
Liquid Propane 
Gas Type 
Liquid Propane 
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 
180000 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 1.0 out of 5 by 1 reviewer.
Rated 1.0 out of 5.0 by Product is a Maintenance Nightmare Two years ago we bought a Rheem ECO-180DV tankless water heater at Home Depot. It was installed by a local plumber in our vacation house in the mountains of Northern New Mexico. In July of this year (2013) our water heater started locking the water heater out after two and one half minutes. After much thought, I believe the lock-out problem was triggered by volatile fumes from staining a porch being pulled into the water heater from the air intake just below the porch. Upon opening the system to trouble shoot the problem, I discovered the system had never been set for the altitude of our house, i.e., 9,000 feet. At that point I made a series of telephone calls to find a qualified tankless water heater technician. After reviewing the situation upon his arrival, the technician called a Rheem call center number available only to tradespeople. He was given the information on how to unlock the system along with the recommendation he disassemble and clean the water heater parts. (Having only six months of actual operation, the system was relatively clean.) Upon completing the above and having no luck in setting the system up to operate at 9,000 feet, he again called the Rheem call center. When he explained what he had done to set the system up for operating at 9,000 feet, the lady (the phone was on speaker) asked him to stay on the line while she went to talk to someone else. When she came back on the phone she said nothing could be done to adjust, as per the Rheem use and care manual, the system to operate at 9,000 feet. So after spending $500 plus dollars for a service call, nearly half of which was for travel, what conclusions did I reach? First, Rheem policy of not providing customers with a service manual is reprehensible. Second, Rheem’s claim that their system can be adjusted for high altitude is false. Third, Rheem’s tankless water heaters have a poor reputation with experienced repair technicians. The technician that serviced our water heater said he would never buy a Rheems because it has too many problems. Knowing what I now know, I would never have bought a Rheems tankless water heater. August 8, 2013
  • 2015-11-25 T10:53:10.405-06:00
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