Rheem EcoSense 3.0 GPM Max Flow Rate 240 Volt 9kw Electric Tankless Water Heater-RETE 9 at The Home Depot
Free shipping

Rheem EcoSense

Model # RETE 9

Internet # 202514581

Store SKU # 452604

3.0 GPM Max Flow Rate 240 Volt 9kw Electric Tankless Water Heater

Rheem EcoSense 3.0 GPM Max Flow Rate 240 Volt 9kw Electric Tankless Water Heater

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

$174.99 / each
  • Uses energy only when hot water is needed
  • Compact design allows simple installation almost anywhere
  • On unit control allows for easy temperature adjustment
Item cannot be shipped to the following state(s): GU,VI


Model # RETE 9

Internet # 202514581

Store SKU # 452604

Store SO SKU # 1000114404

The Rheem EcoSense Tankless Electric water heater is ideal for point of use applications providing continuous hot water on demand. The rugged brass/copper heat exchanger is designed to withstand the toughest water conditions and will heat water only when it is needed, eliminating costly stand-by heat loss. The light weight compact space saving design allows the unit to fit almost anywhere. The on unit temperature controls and LED's indicate active element and standby mode. Standard 1/2 in. water connections and power supply cord for wiring to electrical disconnect box allows for easy installation (240 volt hard wired electricity required) . Excellent option for remodeling and additions. Applications include, Homes, Apartments, Condos, Hospitals, Hotels, Boats, Restaurants, Offices, Laboratories, anywhere hot water is needed. 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.

  • 9 kw 240 volts electric tankless water heater provides continuous hot water on demand
  • Can provide small quantities of continuous hot water for point of use applications
  • 10-year limited warranty on heat exchanger, 1 year limited warranty on parts
  • Rugged brass/copper heat exchanger for longer life
  • LED indicators show active elements and standby mode
  • 1/2 in. side water connections and power supply cord for wiring to electrical disconnect box
  • 240-volt hard-wired electricity required
  • On-unit temperature controls and LEDs indicate active elements and standby mode
  • Max flow rate 3.0 GPM
  • Modulating Control adjusts power consumption to meet the required hot water / temperature flow rate

    How to Choose Your Rheem EcoSense Tankless Electric

    Choose your application, ie. shower, bath tub or vanity sink-faucet, kitchen sink faucet or washer. See chart below.

    For example: you choose a kitchen sink faucet.

    See application chart below and locate your flow rate. For example: your flow rate is 1.5 gpm.

    On the map, locate the average water temperature in your area.

    For example: your water temperature (in Atlanta) is 55°

    Use the water temperature and flow rate chart to determine the model you need.

    For example: 1.5 gpm flow rate + 55° = RETE 9.

Info & Guides

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


Amperage (amps)  38  Assembled Depth (in.)  3 in 
Assembled Height (in.)  10 in  Assembled Width (in.)  7.25 in 
Certifications and Listings  2-UL Recognized  ENERGY STAR Certified  No 
Electric Product Type  Point of Use  Finish Family  Gray 
Flow Rate @ 35 F Rise (gallons/min)  1.76 gal (US)/min  Flow Rate @ 45 F Rise (gallons/min)  1.37 gal (US)/min 
Fuel Type  Electric  Indoor/Outdoor  Indoor 
Labor Warranty  No Warranty  Maximum Temperature (F)  125 
Minimum Activation Rate (gpm)  .4  Minimum Temperature (F)  0 °F 
Part Warranty  1 Year  Point-Of-Use  Yes 
Product Depth (in.)  Product Height (in.)  10 
Product Weight (lb.)  8 lb  Product Width (in.)  7.25 in 
Residential/Commercial/industrial Use  Residential or commercial  Returnable  90-Day 
Water Connection Location  Side  Water Connection Size (in.)  1/2 
Water Heater Features  No Additional Features  Wattage (watts)  9000 


Rated 4 out of 5 by 25 reviewers.
Rated 5 out of 5 by Exactly what I hoped it would be I read some reviews on this product before I bought it and some of those people should be embarrassed of themselves. There is a clear chart showing how to "size" the tankless style water heater for your area. Some of these people are getting this small unit when their ground water is only 50 degrees, what are you seriously expecting to happen. This unit works great for my house. I have a 2 bedroom 2.5 Bath Townhouse in South Florida. I don't need a very strong tankless heater because our ground water is so much warmer than the rest of the country. So this thing works great. If you properly size the unit for you house and location it will work just fine. September 16, 2014
Rated 5 out of 5 by Lovin it! We have a small one bath, two sink cottage which had a huge water heater in my closet taking up space. My brother and friend (who are handy) installed this tankless system. It takes a new heavier wire to the electric box and some new pipe ends. I would hire it done unless you have done a lot of this work before. Installed this tankless is awesome! I have continuos hot water for my shower that stays constant. It is super hot for dish washing. Probably could not wash dishes and someone take a shower at same time on this small system. But it cleared up my closet space and I don't have to pay for heated water sitting around. I love it! April 28, 2013
Rated 4 out of 5 by Does The Job The heater was easy to install but for one point: the water fittings are 1/2" compression copper. Having removed a natural gas tank heater with 3/4" copper lines, flexible hoses would have made the installation a snap, but HD had nothing that would work. I spent multiple trips back and forth before I finally got the correct sequence of copper fittings that would do the job. Once that was resolved, the heater worked great and & I'm quite happy with it. October 14, 2014
Rated 2 out of 5 by Good unit, but product description needs to say 1/2 inch COPPER pipe needed Product page reviews say 1/2 inch, but does not say 1/2 inch COPPER, which is 1/2 inch INSIDE DIAMETER. When I went to store after purchase online to get what was needed and to put a shut off in line so I could turn water on to rest of house, they told me I needed 1/2 inch plastic hot water pipe, and sold me the pieces needed. I told them which unit I had purchased. Unit came in, first noticed that they had sold me male connectors to go to unit, not female. Went back to get female connectors, would not connect, took entire unit it, "associate" was thrown for a loop, did not think you even had the connectors in the store and advised going to a local hardware store instead! Went to manager, he came back to help and between the two of us finally got the adapters needed. More information on what is needed for installation is definitely needed online and your store associates need to know what fits your products, and even what they have in the store! August 19, 2014
Rated 4 out of 5 by Great for Small Bathroom I live in Southern California and I installed this unit for a small pool house sink and shower. Installed and tested the sink and it provided hot water. Then tried to turn on shower. Water was warm. Not hot. I switched the shower head to a 1.5 gpm and now i have a nice hot shower. Well worth it if you don't want to run two water lines to a second location. Installed under sink cabinet and have had no issues. If you want to run a stronger shower head then 1.5gpm I would recommend you purchase a bigger unit. March 15, 2014
2 3 >>


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.