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Performance 24 kW 4.68 GPM 240V Self-Modulating Electric Tankless Water Heater
- Electric tankless water heater provides consistent hot water
- Energy/cost savings up to 34% in whole-home installations
- Tankless water heater requires 3 x 40 AMP. double pole breakers
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Product Details
About This Product
Have hot water when you need it with this energy-saving Rheem electric tankless water heater. Great for small spaces, it doesn't need venting. It delivers continuous hot water on demand for up to three showers and two faucets, and you can easily adjust the temperature. Backed by a one-year parts limited warranty and a five-year heat exchanger warranty.
Highlights
- Energy and cost savings: heats water only when it is needed for savings of up to 50% on water heating costs when used in a point-of-use application, or 34% when used as a whole-home solution
- Instant, continuous hot water: provides ample hot water for up to three showers and two faucets (review selection guide below to confirm this water heater will provide the hot water needed based on your geographic location)
- Space savings: small, compact design fits perfectly in tight places like under cabinets and sinks
- Great investment and value: energy cost savings and a five-year heat exchanger and one-year parts limited warranty
- Easy to adjust: electronic temperature control adjustable in 1-degree increments from 80-140 degrees F with easy-to-read display (Celsius and Fahrenheit compatible)
- Easy installation: compatible with 3/4 in. water connectors for flex hose installation and no venting or T and P valve required (professional installation recommended)
- Easy to maintain: durable, easy-to-replace heating elements
- A reliable hot water solution from Rheem, the global leader in water heating
- Before purchase and installation, please verify that you have the proper electrical requirements for your chosen heater
- ETL Listed to UL-499 and CAN/CSA-C22.2 No. 64
- Need help with a home project? Let us do it for you - 1 800 HOME DEPOT or visit Home Depot.com/services
- Check out our buying guide on water heaters
- What tankless water heater is right for you?
- Click here for more information on Electronic Recycling Programs
- Return Policy
- California residentssee Prop 65 WARNINGS
Product Information
Additional Resources
Shop All RheemSpecifications
Dimensions: H 18 in, W 17.625 in, D 3.5 in
Dimensions
Kilowatt | 24 |
|---|---|
Product Depth (in.) | 3.5 in |
Product Height (in.) | 18 in |
Product Width (in.) | 17.625 in |
Water Connection Size (in.) | 3/4 |
Details
Amperage (A) | 100 A |
|---|---|
Application Type | Residential |
First Hour of Delivery (gallons/hr) | 281 |
Flow Rate @ 35°F Rise (gallons/min) | 4.68 gal (US)/min |
Flow Rate @ 45° Rise (gallons/min) | 3.64 gal (US)/min |
Indoor/Outdoor | Indoor |
Maximum Flow Rate (gallons per minute) | 4.68 |
Number of Showers | 1-2 |
Product Weight (lb.) | 14 lb |
Required Volt Connection | 240 volt |
Returnable | 90-Day |
Uniform Energy Factor | 0 |
Water Heater Features | Wall Mounted |
Water Heater Type | Electric |
Wattage (watts) | 24000 W |
Warranty / Certifications
Certifications and Listings | CSA Listed, ETL Listed, UL Listed |
|---|---|
Part Warranty | 1 Year |
Questions & Answers
Will it work in a mobile home
Hello, The RETEX-13 requires a 1 60amp Double Pole breaker. Please ensure that your mobile home's electrical service panel can support this appliance and your other household electrical usage. Isaiah
Where is the manufacturing number located or which manufacturer number is?
Hi Marian, Based on the information provided, on the Performance RETEX-24, look for the silver or white sticker on the lower outer side of the grey front cover. • Model Number: RETEX-24 (Identifies the model line/specs). • Manufacturing/Serial Number: A unique 10 to 11-digit barcode code (Identifies your specific unit's build date for warranties). For additional assistance, please call 800‑543‑6163 between the hours of 8 A.M. and 5 P.M. EST Monday through Friday. Derius
Is this is a three element?
Hi Jose, Based on the information provided, the Performance RETEX-27 is a three-element tankless water heater. Derius
How is this connecting to you water line
Hello, This unit uses brass 1/2" compression fittings (CF) located on the side for the inlet and outlet water connections. Isaiah
How much is installation
Minimum &/or maximum installation costs for tankless electric water heater?
Hello Peter, Installation costs can vary based on location, difficulty of installation, necessary modifications, average labor cost in your area, and more. We would advise consulting a local plumber to get an approximate cost of installation. You may also check with your local Home Depot for partnered installers that install appliances purchased at The Home Depot. Home Depot Customer Service is available at 1-800-466-3337 anytime between 6 A.M. and 2 A.M. EST and will be able to assist you or transfer you to your local store for more assistance. Isaiah
Does this require to 240 V 40 amp breakers
Hi Greg, Yes, the RETEX-18 requires two separate double-pole 40-Amp 240V circuit breakers. Derius
Can it be installed outdoors without cover exposed to the elements
Hi Sergio, No, the Performance RETEX-27 cannot be installed outdoors exposed to the elements. Derius
will these units operate on 208v single phase?
Hi, Based on the information provided, this unit will operate on 208V single-phase power, but it will experience a performance drop. Because these water heaters are resistive heating appliances engineered primarily for 240V systems, dropping the supplied voltage down to 208V reduces their heating capacity by 25%. For additional information, please call 866-279-4566 between the hours of 7 A.M. and 7 P.M. CST. Derius
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Customer Reviews
3.9 out of 5
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Thank you for your review. We apologize for the inconvenience you have experienced with your water heater.
The model you reviewed includes a 5-year heating chamber and 1-year parts warranty. To better assist you with your warranty coverage options and provide technical advice for your setup, please call our support team at 800‑543‑6163 between the hours of 8:30 A.M. and 5 P.M. EST Monday through Friday.
Derius
Thank you for your 5-star review, Ali! We're delighted to hear that your tankless water heater is delivering the endless hot water and efficiency you were looking for. It's especially rewarding to receive feedback from an HVAC professional, and we appreciate your confidence in recommending our product to your customers. Thank you for choosing Rheem!
Derius
We are incredibly sorry for this experience and completely understand your frustration. Going weeks without hot water is a major disruption, and to receive two non-functioning units is completely unacceptable. We deeply appreciate the thorough troubleshooting you did, including verifying the 240v lines and water flow. We want to help find what went wrong with these units immediately and find a solution for you. Please contact our support team directly at 800-543-6163 between the hours of 8 A.M. and 5 P.M. EST Monday through Friday, so a specialist can assist you right away.
Derius
Thank you for sharing your feedback. We apologize for the confusion and frustration caused by the discrepancy between the product specifications listed online and the information provided with the unit. Accurate product information is important when planning an installation, and we understand the inconvenience this may have created.
We recommend following the electrical requirements listed on the unit's rating label and installation documentation, and consulting with your licensed electrician regarding compatibility with your electrical panel. If you have any questions about the product's electrical requirements or need additional assistance, please contact our Technical Support team at 866-279-4566. We appreciate your feedback and the opportunity to assist.
Moneke
Thank you for sharing your feedback. We’re glad to hear the installation was easy and that the unit is working so well for your apartment. It’s great that the water heats quickly and keeps up even when you’re running other appliances. We appreciate you taking the time to leave a review.
Derius
Thank you for sharing your feedback. We’re glad to hear the installation went smoothly and that the unit is performing so well for you. It’s great to know you’re happy with the hot water output. We appreciate you taking the time to leave a review.
Derius
Thank you for sharing your feedback, we’re glad to hear the unit was easy to install and operate, and that it’s been working great so far. We appreciate you taking the time to leave a review.
Derius
Thank you for taking the time to share your experience! We’re glad to hear the installation went smoothly with the proper electrical setup and that the unit is meeting the hot water demands of your home. It’s great to know it’s providing plenty of hot water for your household needs—including multiple bathrooms and appliances. We appreciate your feedback and thank you for choosing our product!
Moneke
Thank you for taking the time to share your experience, and we’re very sorry to hear about the ongoing temperature fluctuation issues you’ve dealt with over the past two years. Sudden shifts from hot to cold—or spikes to unsafe temperatures—are extremely frustrating, and this is certainly not the performance we want our customers to experience.
We also apologize for any difficulty you had reaching support. You deserve timely assistance, and we regret that this was not your experience.
Based on your description, there may be a control, sensor, or mixing-related issue that needs further diagnosis, and we would appreciate the opportunity to help address it. If you haven’t already, please contact our Technical Support Team directly at 866‑279‑4566 so we can review the unit’s behavior with you and determine the correct next steps.
Your feedback is important, and we want to ensure you receive the support needed to restore safe, consistent operation.
Thank you again for bringing this to our attention.
Moneke
Thank you for taking the time to share your experience. We’re very sorry to hear that your water heater has not met your expectations, especially after investing in a second unit and taking extra steps with maintenance and filtration. We understand how frustrating it is to experience repeated interruptions to your hot water supply.
Your feedback is important, and we appreciate you highlighting your challenges so we can continue improving our products and support.
If you’re open to it, we’d be glad to learn more about what happened so we can better understand the situation and help prevent similar experiences for future customers. In any case, we truly appreciate your honesty and the time you took to share your review.
Thank you again for your feedback.
Moneke
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Compare Key Features
Product Snapshot | |||
|---|---|---|---|
Ideal for homeowners looking for energy efficiency , making hot water instant and reducing water heating costs . A great choice for those who need a whole-home solution without compromising on quality .. | Ideal for homeowners looking for an energy-efficient water heater , making hot water delivery easier and more efficient . This tankless water heater provides endless hot water on demand , saving energy and money .. | Ideal for homeowners looking for endless hot water, making showering and dishwashing easier and more efficient. This tankless water heater offers precise temperature control and remarkable energy savings. | Ideal for homeowners looking for endless hot water, making showering and dishwashing easier and more efficient. |
Flow Rate | |||
4.68 GPM | 3.75 GPM | 7.03 GPM | 7.03 GPM |
Power Output | |||
24000 W | 19.2 kW | 36000 W | 36000 W |
Temperature Control | |||
Electronic temperature control adjustable in 1-degree increments from 80-140 degrees F | 68 to 140°F | 68 to 140°F | 68 to 140°F |
Maximum Temperature | |||
140 F | 140 F | 140 F | 140 F |
Smart Connectivity | |||
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