--- product_id: 5802991 title: "ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology , 17 x 14 x 3.5, White" brand: "ecosmart" price: "$981.44" currency: USD in_stock: true reviews_count: 13 category: "Eco Smart" url: https://www.desertcart.us/products/5802991-eco-18-electric-tankless-water-heater-18-kw-at-240 store_origin: US region: United States of America --- # 18 KW Power Boost 3.5 GPM Flow Rate 1° Precise Digital Control ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology , 17 x 14 x 3.5, White **Brand:** ecosmart **Price:** $981.44 **Availability:** ✅ In Stock ## Summary > ⚡ Heat Smarter, Live Better: Endless Hot Water, Zero Waste ## Quick Answers - **What is this?** ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology , 17 x 14 x 3.5, White by ecosmart - **How much does it cost?** $981.44 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/5802991-eco-18-electric-tankless-water-heater-18-kw-at-240) ## Best For - ecosmart enthusiasts ## Why This Product - Trusted ecosmart brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Energy-Smart Efficiency:** 99.8% energy efficient with patented self-modulating tech that adapts power use to your needs, saving you money. - • **Reliable Lifetime Warranty:** Backed by a lifetime warranty on electronics and heating elements—invest once, enjoy for years. - • **Space-Saving Sleek Profile:** Compact 17x14x3.5 inch wall-mount design frees up valuable space in your home or garage. - • **Instant Hot Water, Zero Wait:** Tankless design delivers endless hot water on demand—never run out during your morning routine. - • **Precision Temperature Control:** Set your perfect water temperature in 1-degree increments for spa-like comfort every time. ## Overview The EcoSmart ECO 18 is a powerful 18 KW electric tankless water heater designed for warmer climates with incoming water temperatures above 62°F. It delivers up to 3.5 gallons per minute of continuous hot water, controlled digitally with 1-degree precision. Its patented self-modulating technology maximizes energy efficiency at 99.8%, reducing electric consumption while providing reliable, on-demand heating. Compact and wall-mountable, it saves space and comes with a lifetime warranty on key components, making it a smart, sustainable upgrade for modern homes. ## Description Product Description 18 kilowatt, smart technology electric tankless water heater, configured for climates where incoming water temperature is 62 degrees & above, capable of heating over 2.5 gallons per minute which is the equivalent of one shower head with a 1.5 gpm flow & 1 sink with a low inlet water temperature of 62 degrees, 2 Showers can be run simultaneously when incoming water temperature is above 70 degrees warmer climates such as south Texas, south Florida, new Mexico, Arizona & south California, digital temperature control that allows you to set your temperature in increments of 1, 240V, requires two 40a double pole breakers & two 8 gauge wires, included. From the Manufacturer This Smart Technology electric tankless water heater is configured for climates where incoming water temperature is 62 Degree F and above. The ECO 18 is capable of heating over 2.5-Gallon per minute, which is the equivalent of one shower head (with a 1.5 gpm flow) and one sink with a low inlet water temperature of 62 Degree F. Two showers can be run simultaneously when incoming water temperature is above 70 Degree F in warmer climates such as South Texas, South Florida, New Mexico, Arizona and South California. These models come with a digital temperature control that allows you to set your temperature in increments of 1 Degree. Prior to purchase and installation please verify this model is the rights size for your hot water needs and electrical requirements. Review: Very Happy with Ecosmart ECO 18 - I purchased the ECOsmart ECO 18 tankless water heater in April from desertcart during one of their open box warehouse sales for a very cheap price. The unit arrived as a wreck (as I expected it would). After beating out the smashed in cover (from improper shipping packaging) I inspected the inner workings, and found several parts ajar, and the cold water inlet fitting missing. desertcart offered an additional discount to me, so I took it, and set out to fix the unit, and replace the missing part. The cold inlet fitting has a one of a kind unique fitting threads, and I quickly found out that it’s irreplaceable. A call to Ecosmart tech support was personally and professionally handled. The tech told me that this part is not available. He then went into their spare parts junk drawer, found one used, and sent it to me for next to nothing. I couldn’t be happier with Ecosmarts service! The unit sat for 4 months until I had time to install it myself. I wanted to be sure it worked before gutting out my perfectly good water heater, so this report is what I found by permanently wiring, but temporarily plumbing the unit so as to not disturb the existing water heater. First of all, I live in South Florida (Broward County). Our water is fairly warm as supplied (70 Deg. Inlet temperatures in summer). I can only report how the unit worked with reasonably warm inlet temperatures. I’ve lived in the past in places where the water is 50 Deg. Year round coming out of the tap (NE Ohio), so I know I’m living in ideal conditions for a tankless electric water heater set up. I can report the following: I measured my normal shower water temperature. I like a hot shower. Using a lab quality thermometer, I find a water temperature of 95 to 98 Degrees is pretty darn hot. Maybe not hot enough to thaw out a frozen Ohio Linesmen, or firefighter with ice frozen to your face, but plenty hot for normal humans. I have the ECosmart 18 because electrically, my house only has 150 amp service. Larger Ecosmart units would overload my supply service. As tested, a 5 GPM flow (That’s enough for two old fashioned shower heads AND a sink running hot, the outlet hot water as measured was 115 degrees. This is with the unit set as high as it will go (140 Degrees). The unit will maintain a 45 degree water temp increase over inlet temperature. Testing at a flow rate of 2.5 Gallons per min.(enough for an old fashioned shower head and a sink), the unit maintained 135 deg. With the temp set at 140. My unit had no problem maintaining 115 deg. output if set at 120 deg. With a flow rate of 2.5 gallons a minute. In testing, I found a constant 5 degree error between what the unit says the set temperature is, and actual. Not bad considering it’s not an aerospace product, and some small gauge error is possible. The hot water tank I’m replacing is a 65 gallon unit, and IT DOES flicker the house lights every time a heating element turns on. (Noticeably annoying). I am super happy to report that the Ecosmart 18 unit does not flicker my house lighting. If you look very carefully, a very, very slight, teeny, weeinee load can be seen in the interior lighting of the house when the Ecosmart unit turns on, but it’s MUCH better than my existing standard tank type water heater. The ECO 18 turns on with very little water flow (a sink just turned on enough to wet a tooth brush will trigger it to heat the water) so flow sensing is perfect, and not a factor at all. My overall opinion is that yes, the unit is delicate, and is prone to damage in shipping. Once placed in service, it’s rugged enough to last a long time, and it works better than advertised. If you are in very cold water climate, you will need the biggest unit, and adequate power supply. Ecosmart lists what the unit will actually do modestly. If you read up on the specifications for each of their units, and match your water need and water temperature and follow the installation instructions you will never be disappointed by purchasing an Ecosmart unit. These things are great! Do your homework before you buy, and match it properly, you won’t be disappointed! Removing that old tank water heater and replacing it with the Ecosmart gave me a whole lot more room in my garage, as an added benefit too! Review: Excellent Product, Unmatched Quality at a very reasonable price ***One year update - The Good As for the item itself I would only suggest that the purchaser make sure they have sized the unit correctly for their needs and have taken their area's ground water temp into account. The unit has a sublimely simple design and its shell is both space efficient and cosmetically pleasing. Unlimited hot water is a decadent luxury and Ecosmart makes it affordable to all. My lady is finally able to take her time wash and shave without ever running out of hot water (yikes for my water consumption). Regarding water consumption I'v found that this unit works amazingly well with the "Spa Fire-Hydrant" shower head, Economy and Performance. The Bad This pertains to the install process and NOT the unit. -- The plumbing is very straight forward and should be doable by a moderately experienced DIY'er with basic plumbing tools and a little soldering know-how. The electrical work is also not very difficult, BUT requires two Double-Pole 40-Amp Breakers and sufficient sized service to handle the unit (which is actually comparatively large). But if you've got the space or are willing to upgrade your electric service, this item is a must-have. Final Warning The large cost for this unit will come from the install by licensed professionals without which you cannot quality for the lifetime Warranty, My advice (if you are not planning to install yourself) would be to get quotes for the install (both plumbing and electrical) and compare those numbers to the cost of the unit if you end up paying more for the install than the unit is worth you might be better off forgoing the warranty because if you do have a problem it would still be cheaper to by a replacement unit. ***One year Update I've had this unit for a year now and recently blew a heating element, (an issue caused by a plumbing change and NOT the unit itself). I only bring it up because its a bit of a pain to have to order a replacement from Eco-Smart since no other place I found (Even desertcart!**(CAN be purchased on desertcart now)) carries this odd element size (9kW 240v Screw-In). So I would suggest having a spare on hand to avoid the shipping time wait if it becomes necessary. Also having seen first-hand what kind of scale and build-up can occur at tragic speeds on the heating elements, do yourself a favor and drop the extra $65 on the recommend 'Aqua-pure' scale inhibitor. Most users can only tell you that it seems to work having nothing to compare it against. I have seen both sides and it makes a world of difference! Aside from that, I am Extremely happy with this purchase, there is no going back in my household, Even with my girlfriend's new 45-minute long shower ritual (compared to the 25ish she use to get), I have seen a consistent 20-30% electric consumption drop when compared to the two years proceeding it. So my unit will have paid for itself after another year of usage. If your experience is anything like mine you will NOT be disappointed with this unit, so I'd say buy with confidence ***5-year Update At the 5 year mark, I have been through 2 heating elements (since installed) and always keep 2 on hand to be prepared. I am positive that the unit has paid for itself at least twice and is still working strong. There is absolutely no going back to a standard tanked unit. Until a recent trip out of town in a hotel shower, I'd completely forgot about running out of hot water. The moment this unit breaks I'm replacing it with an identical unit. (A decision made over 2 years ago) every home owner should have one of these units. Save space, save money, and enjoy your unlimited hot water as a bonus for your wonderful investment! *** 10-year update, Just blew another heating element (5 in total now after a decade), and they are now available for purchase on desertcart! My unit is STILL running strong and my girlfriend has built her own home and installed an Eco27 (As I mentioned, once you've experienced unlimited hot water there's no going back). This device has already well exceeded my expectations and I'm overjoyed to give an amazing review. Love this product and WILL buy again in the home I'm planning to build. ## Features - Configured for climates where incoming water temperature is 62 degrees F and above. - Capable of heating over 2.5 gpm. - Digital temperature control allows temperature settings in 1 degree increments. - Voltage: 240 - Single phase ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0047V0KSU | | Best Sellers Rank | #92,479 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #73 in Water Heaters | | Brand | EcoSmart | | Brand Name | EcoSmart | | Color | White | | Customer Reviews | 4.3 out of 5 stars 2,443 Reviews | | Efficiency | 99.8 % | | Flow Rate | 3.51 gpm | | Global Trade Identification Number | 00854920002046 | | Heat Output | 18 KW | | Included Components | electric tankless water heater | | Item Depth | 3.5 inches | | Item Dimensions W x H | 14"W x 17"H | | Item Type Name | Electric Tankless Water Heater | | Item Weight | 11.7 pounds | | Manufacturer | EcoSmart Green Energy Products | | Manufacturer Part Number | ECO 18 | | Manufacturer Warranty Description | Lifetime Warranty on electronics, exchanger and element. Warranty only covers cost of heater; does not cover labor or any incidental damages. | | Material Type | Metal | | Model Number | ECO 18 | | Mount Type | Wall | | Number of Items | 1 | | Number of Packs | 1 | | Power Source | Corded Electric | | Product Dimensions | 14"W x 17"H | | Special Feature | special_feature | | Special Features | special_feature | | Style Name | ECO 18 | | UPC | 854920002046 | | Unit Count | 1 Count | | Voltage | 240 volts | | Wattage | 18000 watts | ## Product Details - **Brand:** EcoSmart - **Color:** White - **Power Source:** Corded Electric - **Product Dimensions:** 14"W x 17"H - **Special Feature:** special_feature ## Images ![ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology , 17 x 14 x 3.5, White - Image 1](https://m.media-amazon.com/images/I/61tVloS6zLL.jpg) ![ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology , 17 x 14 x 3.5, White - Image 2](https://m.media-amazon.com/images/I/61YfW8FjtIL.jpg) ![ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology , 17 x 14 x 3.5, White - Image 3](https://m.media-amazon.com/images/I/61so5imgnwL.jpg) ![ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology , 17 x 14 x 3.5, White - Image 4](https://m.media-amazon.com/images/I/616EcY3OpGL.jpg) ![ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology , 17 x 14 x 3.5, White - Image 5](https://m.media-amazon.com/images/I/51Ejb3SPH5S.jpg) ## Available Options This product comes in different **Pattern, Style** options. ## Questions & Answers **Q: How do know which size to buy? We will supply two bathrooms, dish washer, clothes washer. What size should I choose?** A: I noted someone below stating they got the largest one and they can only run one water source at a time. My guess is they installed it wrong by not getting the electric hooked up right, or maybe the unit was just defective, or they live in Alaska. I went under size with an Eco 27 a few years ago because that’s all my electric panel could handle. We have zero issues in the summer. During winter months we can only run one shower at a time and have to slowly fill a tub (maybe 3/4 fill speed). To save as much money as I am on electric bill and have unlimited shower lengths (only 1 person at a time mid-Dec to mid-March) is totally worth it. On here today because I’m thinking of upping my panel size so was thinking of going with a larger one now. Regardless, CCRC’s experience with the largest unit not working is nothing like the experience I’ve had, and again I intentionally undersized mine for the house. The website has a clear chart to explain size you need based on number of water fixtures in your home and ground water temperature. **Q: My inlet temp is 44 degrees. I'm only concerned with using one shower. Will this supply 105 degrees at 1.75 GPM's?** A: My water heater receives a cold water supply of about 40 degrees, than produces HOT water @ about 140, depending on the distance between the heater and the shower (travel time) you should do fine. **Q: Just to be certain, please confirm if this is a whole house water heater. Can I simply remove my current 50 gal water heater and install this?** A: We installed this last July and have been very happy with it. We have a small house of about 1000 square feet and 2 people and my daughter coming by every week with lots of laundry. We have had no problems what so ever. **Q: I just bought the ECO 18. I was prepared to have a double 40A breaker installed, but the instructions say I need TWO double pole 40A. Is that correct?** A: The ECO-18 requires two seperate circuits therefore two 40A breakers. We love ours, infact we just bought a second one for the hot tub. Sure saves on the electric bill. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very Happy with Ecosmart ECO 18 *by J***S on September 24, 2015* I purchased the ECOsmart ECO 18 tankless water heater in April from Amazon during one of their open box warehouse sales for a very cheap price. The unit arrived as a wreck (as I expected it would). After beating out the smashed in cover (from improper shipping packaging) I inspected the inner workings, and found several parts ajar, and the cold water inlet fitting missing. Amazon offered an additional discount to me, so I took it, and set out to fix the unit, and replace the missing part. The cold inlet fitting has a one of a kind unique fitting threads, and I quickly found out that it’s irreplaceable. A call to Ecosmart tech support was personally and professionally handled. The tech told me that this part is not available. He then went into their spare parts junk drawer, found one used, and sent it to me for next to nothing. I couldn’t be happier with Ecosmarts service! The unit sat for 4 months until I had time to install it myself. I wanted to be sure it worked before gutting out my perfectly good water heater, so this report is what I found by permanently wiring, but temporarily plumbing the unit so as to not disturb the existing water heater. First of all, I live in South Florida (Broward County). Our water is fairly warm as supplied (70 Deg. Inlet temperatures in summer). I can only report how the unit worked with reasonably warm inlet temperatures. I’ve lived in the past in places where the water is 50 Deg. Year round coming out of the tap (NE Ohio), so I know I’m living in ideal conditions for a tankless electric water heater set up. I can report the following: I measured my normal shower water temperature. I like a hot shower. Using a lab quality thermometer, I find a water temperature of 95 to 98 Degrees is pretty darn hot. Maybe not hot enough to thaw out a frozen Ohio Linesmen, or firefighter with ice frozen to your face, but plenty hot for normal humans. I have the ECosmart 18 because electrically, my house only has 150 amp service. Larger Ecosmart units would overload my supply service. As tested, a 5 GPM flow (That’s enough for two old fashioned shower heads AND a sink running hot, the outlet hot water as measured was 115 degrees. This is with the unit set as high as it will go (140 Degrees). The unit will maintain a 45 degree water temp increase over inlet temperature. Testing at a flow rate of 2.5 Gallons per min.(enough for an old fashioned shower head and a sink), the unit maintained 135 deg. With the temp set at 140. My unit had no problem maintaining 115 deg. output if set at 120 deg. With a flow rate of 2.5 gallons a minute. In testing, I found a constant 5 degree error between what the unit says the set temperature is, and actual. Not bad considering it’s not an aerospace product, and some small gauge error is possible. The hot water tank I’m replacing is a 65 gallon unit, and IT DOES flicker the house lights every time a heating element turns on. (Noticeably annoying). I am super happy to report that the Ecosmart 18 unit does not flicker my house lighting. If you look very carefully, a very, very slight, teeny, weeinee load can be seen in the interior lighting of the house when the Ecosmart unit turns on, but it’s MUCH better than my existing standard tank type water heater. The ECO 18 turns on with very little water flow (a sink just turned on enough to wet a tooth brush will trigger it to heat the water) so flow sensing is perfect, and not a factor at all. My overall opinion is that yes, the unit is delicate, and is prone to damage in shipping. Once placed in service, it’s rugged enough to last a long time, and it works better than advertised. If you are in very cold water climate, you will need the biggest unit, and adequate power supply. Ecosmart lists what the unit will actually do modestly. If you read up on the specifications for each of their units, and match your water need and water temperature and follow the installation instructions you will never be disappointed by purchasing an Ecosmart unit. These things are great! Do your homework before you buy, and match it properly, you won’t be disappointed! Removing that old tank water heater and replacing it with the Ecosmart gave me a whole lot more room in my garage, as an added benefit too! ### ⭐⭐⭐⭐⭐ Excellent Product, Unmatched Quality at a very reasonable price ***One year update *by I***T on April 2, 2014* The Good As for the item itself I would only suggest that the purchaser make sure they have sized the unit correctly for their needs and have taken their area's ground water temp into account. The unit has a sublimely simple design and its shell is both space efficient and cosmetically pleasing. Unlimited hot water is a decadent luxury and Ecosmart makes it affordable to all. My lady is finally able to take her time wash and shave without ever running out of hot water (yikes for my water consumption). Regarding water consumption I'v found that this unit works amazingly well with the "Spa Fire-Hydrant" shower head, Economy and Performance. The Bad This pertains to the install process and NOT the unit. -- The plumbing is very straight forward and should be doable by a moderately experienced DIY'er with basic plumbing tools and a little soldering know-how. The electrical work is also not very difficult, BUT requires two Double-Pole 40-Amp Breakers and sufficient sized service to handle the unit (which is actually comparatively large). But if you've got the space or are willing to upgrade your electric service, this item is a must-have. Final Warning The large cost for this unit will come from the install by licensed professionals without which you cannot quality for the lifetime Warranty, My advice (if you are not planning to install yourself) would be to get quotes for the install (both plumbing and electrical) and compare those numbers to the cost of the unit if you end up paying more for the install than the unit is worth you might be better off forgoing the warranty because if you do have a problem it would still be cheaper to by a replacement unit. ***One year Update I've had this unit for a year now and recently blew a heating element, (an issue caused by a plumbing change and NOT the unit itself). I only bring it up because its a bit of a pain to have to order a replacement from Eco-Smart since no other place I found (Even Amazon!**(CAN be purchased on amazon now)) carries this odd element size (9kW 240v Screw-In). So I would suggest having a spare on hand to avoid the shipping time wait if it becomes necessary. Also having seen first-hand what kind of scale and build-up can occur at tragic speeds on the heating elements, do yourself a favor and drop the extra $65 on the recommend 'Aqua-pure' scale inhibitor. Most users can only tell you that it seems to work having nothing to compare it against. I have seen both sides and it makes a world of difference! Aside from that, I am Extremely happy with this purchase, there is no going back in my household, Even with my girlfriend's new 45-minute long shower ritual (compared to the 25ish she use to get), I have seen a consistent 20-30% electric consumption drop when compared to the two years proceeding it. So my unit will have paid for itself after another year of usage. If your experience is anything like mine you will NOT be disappointed with this unit, so I'd say buy with confidence ***5-year Update At the 5 year mark, I have been through 2 heating elements (since installed) and always keep 2 on hand to be prepared. I am positive that the unit has paid for itself at least twice and is still working strong. There is absolutely no going back to a standard tanked unit. Until a recent trip out of town in a hotel shower, I'd completely forgot about running out of hot water. The moment this unit breaks I'm replacing it with an identical unit. (A decision made over 2 years ago) every home owner should have one of these units. Save space, save money, and enjoy your unlimited hot water as a bonus for your wonderful investment! *** 10-year update, Just blew another heating element (5 in total now after a decade), and they are now available for purchase on amazon! My unit is STILL running strong and my girlfriend has built her own home and installed an Eco27 (As I mentioned, once you've experienced unlimited hot water there's no going back). This device has already well exceeded my expectations and I'm overjoyed to give an amazing review. Love this product and WILL buy again in the home I'm planning to build. ### ⭐⭐⭐⭐⭐ I was skeptical at first, but this was absolutely a worthwhile purchase *by S***L on July 27, 2014* I was unsure this model would be sufficient for the demands of my house (3bed/2.5 bath, but high demands for hot water), but the folks at EcoSmart walked me through the specifications and assured me this would definitely suffice. They were right. My existing electrical panel was no longer made, which meant adding the additional breakers was not an option. I ended up having to replace the entire panel; the cost was tough to stomach ($1000) but truthfully having a brand-new panel does give me a lot of peace of mind, and I'm sure the old one was past it's recommended life. Beyond that, all I needed was wiring run from the panel (which was also in the garage, and just under 15 ft from the existing electric tank heater) which the electrician ran in a conduit, and modifying the plumbing to accept threaded connectors. Home Depot had a kit for $30 including hoses and two compression fittings to convert standard copper piping to threaded inputs. All in all, the plumbing, mounting and connecting took just under three hours. I am VERY happy I made this purchase; the unit is clearly well-made and the lifetime warranty just can't be beat. UPDATE 8/24/2014: For some reason over the last week, the unit has not been switching on when hot water is demanded. I checked the breakers, but they were still on. I cycled them, and when the unit came on, the display was flickering, but the water was being heated. I had to do this several more times over the next few days. Tonight, I went through the technical troubleshooting guide to make sure the wiring wasn't crossed (it wasn't) and that the elements were drawing power. Everything checked out. Oddly enough, I put the cover back on and restored power, and now it's working perfectly, even though I didn't change anything. I'm going to keep an eye on it. MAKE SURE TO SUBMIT THE WARRANTY INFORMATION WITHIN 30 DAYS OF PURCHASE!!!!!! http://www.ecosmartus.com/customer-service/warranty-registration.aspx UPDATE 9/2/2014: The problem had started to get more constantly-occurring so I contacted EcoSmart via their website last week. I have yet to hear back from them; one of the reps had emailed me directly to confirm receipt of my warranty registration. I replied to her and asked her to investigate. I told her that we performed the steps in the troubleshooting guide and determined that the heating elements were both faulty since they read 0V from screw-to-screw (properly functioning elements should read ~220V). If this is the case, it makes me question the quality of the parts used on this product; we've only had it for a little over two months and for parts to fail that quickly (and two out of two for that matter) is a yellow flag. Stay tuned... UPDATE 9/5/2014: So I called them yesterday (Thursday) so they could help me troubleshoot. After about 20 minutes on the phone they determined the motherboard was bad and overnighted me a new one. I just finished installing the new one (took 15 minutes, about 6 screws and 5 snap-in plugs) and the thing works perfectly now. Now I know two months in for hardware to fail is a little questionable but these tankless water heaters are still developing and it's the only electronic part of the whole thing (the rest is tried-and-true electrical components, elements and thermostats). I stand by my recommendation...The EcoSmart tech support guys were very helpful getting me straightened out so even if something goes wrong, they will do their best to help you out. ## Frequently Bought Together - EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology , 17 x 14 x 3.5, White - HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass - Waterdrop AP431 AP430SS Whole House Scale Inhibitor Filter, Heater Softener System, Prevent Scale Build Up On Hot Water Heaters, Pipes and Boilers --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/5802991-eco-18-electric-tankless-water-heater-18-kw-at-240](https://www.desertcart.us/products/5802991-eco-18-electric-tankless-water-heater-18-kw-at-240) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-26*