Features:

  • Savings of up to 50% on water heating costs. Dimensions :17H x 17W x 3.625D inches ;Pipes fittings :3/4 inch NPT
  • Digital temperature control in 1-degree increments allows control of hot water; Activation Flow: 0.3 GPM
  • Copper and stainless components designed for efficiency, durability and easy replacement.
  • Compact size saves valuable storage space, while the stylish and advanced design is pleasing to the eye and Copper and stainless components designed for efficiency, durability and easy replacement.
  • Prior to purchase & installation, please verify that this model is the right size for your hot water needs and electrical requirements. Electrical requirements: 27 kW, 240 volts, (3) 40 required breakers, 112.5 maximum power (AMP), (3) 8 required wire.Amperage Draw:113 A
  • Required Breaker Quantity: Three 40 Amp Double Pole
  • Recommended Electrical Panel: 200 Amps
  • NEVER run out of hot water with an ECOSMART tankless water heater.
  • Save up to 12 cubic feet of storage space.
  • Digital temperature control in 1-degree increments gives users complete control of hot water
Great product so far...

I owned this product so far for a month and has been doing great. Excellent performance, consistently hot water and great energy savings. I installed it my self and I have a few tips: Make sure you use #6 electric cable, it's the recommended and safer cable width. You will need three cables and a 60 amp breaker. For the water pipes. You will NOT need any water heater hose. You only need to adapt the house water pipes to the heater with pressure fitting (which are included with the water heater) make sure that after you install all, BUT before feeding the heater with electricity, open all the house hot and cold water faucets to remove all the air inside the pipes. THEN, feed it with the electricity. After this you will be amazed by its performance. The only thing that I am concern is: how much time will this water heater will last without any problems? For me anything beyond 2 years is acceptable. Before 2 years will be very disappointing. So I will be informing you during time, to tell about it's performance. If you have read all my review, like it, so I can be more motivated to give you more updates. So far this product is definitely a MUST BUY... And if you have any doubt if this water heater will work for all your house, the answer is yes. It has more than enough heating capacity for any normal house unless you have a huge house with 3 bathrooms or more and expects 3 or more persons taking a bath or shower at the same time. FIRST UPDATE: WOW, My first electricity bill came and I save 33 dollars compared to the previous month. Nothing in my house has changed from previous billing cycle to this current cycle. At this pace the investment will pay for itself in like 6 months, that its VERY IMPRESSIVE!!! SECOND UPDATE (DEC 9, 2013) It's been 14 months since I installed this water heater and it is working beautifully and it paid for himself in energy savings alone. This product is worth every cent. I hope it last more years...

So far so good!

I've had this installed for about a month now and I'd say it works better than the 50 gal. Gas tank style unit I took out, which by the way ran non stop. I think there would be far better Reviews on this product if people would take the time and do their own diligent research on the products that they are buying . I find it amazing how many people are quick to leave a bad review on a product when their ignorance was the primary reason for the product not performing as they had hoped. That being said time will tell whether or not this product will last as long as the old tank style heater I had before but as of right now I absolutely love it and I expect to be enjoying the energy savings reflected on my utility bill soon. It is true this unit does draw a 150 amps at full capacity but being an electrician I took some real load test on it and found out that the 4 circuits actually are staged, so unless you have 4 people showering at all at the same time you will likely never see anywhere close to that current draw. I'll check back in a year-and revaluate this review but for now 5 stars baby

ECO27 Details and Conversion to Boiler Mode - In Depth

Some information about this unit (and the entire product line) is sparse, and numerous people have posted inaccurate information as well. First, RTFM. EcoSmart provides a wealth of information online, and all of us would do well to check their site before posting bad information. I have two of these units, one for DHW (Domestic Hot Water) and the other to operate our whole house hot water baseboard system. Some information is hard to find, and other information is a closely guarded secret and cannot be obtained anywhere online. I'll focus on these areas. The unit is rated at 27KW at 240 volts. Internally, it is three separate 9KW heaters, operating in series and in sequence based on demand. The unit is truly self-modulating and will not provide more heat than the load requires. Each individual heater requires a dedicated 240 circuit, rated at 40 amps, and provided via #8 wire. For the Ohm's law fanatics, each unit draws 37.5 amps under full load, for a total system load of 112.5 amps. Anybody that tries to operate this unit off of a 100 amp main breaker deserves what he gets. We have ours connected to our main 150 service, and can get away with it because everything else in the house is "green" and we can operate everything else with the 37.5 amps available if the heater is running under full load. I'll say this again: Each internal unit requires a separate, dedicated 240 volt 40 amp circuit, equalling a total of three separate #8 wire 240 volt circuits. I hope I made that plain enough. The heat exchangers inside the heater are 3 copper pipes, cross connected in series with about 1/2" dia. copper sections. So there is a flow restriction, but nothing as radical as some of the reviews would have us believe. Some reviewers have posted that their hot water is down to a trickle. I've been inside this unit from top to bottom. If your hot water only dribbles, it is time to clean your pipes or replace your valves. We have not been able to observe a loss of flow anywhere in our house, enough said about that. The upper temperature limit is 140 degrees F. That is a difficult number to discover, but it is out there if you do your homework. Regardless, 140 is the hard upper limit in DHW mode. This is not a limitation of the unit, it is a safety limitation to minimize the chance of someone scalding themselves, and EcoSmart states this all across their web pages. Here's the undocumented stuff: EcoSmart supports hot water heating, and even provides plumbing diagrams. However, they will not tell you how to get 160 or 180 degree water. There are internal jumpers in the heater that allow you to limit the maximum output temperature to 105 degrees (handy for the elderly or where there are small children playing with the knob), and it is also possible to set a wattage limit across the 3 heating elements. The factory setting is 9KW per element, and 140 degrees max. output. At the very top of the jumper strip is one marked "180". With power removed, place a jumper on these two pins and the unit will allow a setpoint of up to 180 degrees when power is restored. Most hot water heating systems operate best in the 160 degree area, and the older oil fired boilers actually used a setpoint of 200 degrees. Clearly, a heater with an upper limit of 140 degrees could cause poor performance of most baseboard hot water systems, and many of the newer hydronic systems. We replaced an antique oil fired boiler with the ECO27, and placed the setpoint at 160 to get started. The performance is nothing short of amazing, and I've actually dropped the setpoint to 150 until we get into the dead of winter. It is very nice to know that we have a reserve available. EcoSmart provides a wealth of information about the capability of this unit. I see over and over again that people can't (or won't) get their heads around a lot of what's commonly available. Simply, if you need 4 GPM, the best this unit can do is heat the water by 46 degrees. In other words, if you want a 110 degree shower (at a ridiculous 4 GPM), you must have incoming water of at least 64 degrees. If you live in an area where your water source is about 50 degrees, you will get 96 degree showers at 4 GPM. The obvious solution is to spend $20 and get a low-flow shower head. At 3 GPM this unit can give you a 110 degree shower with incoming water of only 49 degrees. At 2 GPM this unit will provide the full 140 degree setpoint with 50 degree incoming water. In boiler service, obtaining 160 degree water will require incoming water of at least 114 degrees. Most hot water heating systems operate with a differential of less than 20 degrees, so this unit is just loafing along while providing 160 degree water to your baseboard units. Also, most standard hot water heating systems have a design of either 1 GPM or 4 GPM. The temperature rise chart from EcoSmart demonstrates that a temperature rise of 184 degrees is possible at 1 GPM. Again, most hot water systems operate with a differential (or "Delta-T") of around 17 degrees, often less. The actual temperature setpoint isn't the focus as much as being able to maintain the differential is. So for a 180 degree output, we need to feed the heater with 163 degree water. At a mere 17 degree rise, this heater can easily flow well beyond 6 GPM, probably closer to 10 GPM, but we only need a max. of 4 GPM. So for boiler service, it is a perfect solution. It is small, silent and smart. If you're considering this unit for hot water baseboard or hydronic service, it is capable of 92,000 BTU/hr. It has been incorrectly represented that this is the largest electric tankless available. The largest commonly available electric tankless is 36KW. Just to set the record straight. Overall, I give this unit 5 stars. Price, reliability and technical support are right up there. The unit comes with a lifetime warranty when professionally installed. Cleaning and maintenance is accomplished with a Phillips screwdriver, no more pipe wrenches and fiberglass insulation to contend with. The unit is so small and lightweight that I actually carried it into the house under one arm, installed it and said nothing. Nobody knew that I'd done this until days later! The unit supports a remote thermostat which is very inexpensive and is waterproof. The little remote connects with telephone wire and is perfect for a location next to your sink or shower. We are a 3 adult household, using all of the "normal" things, doing laundry, taking showers, washing dishes, etc. I have been able to purposely cause the heater to fail to keep up, and that was by running the tub wide open. In any other situation, two showers at once, someone in the shower, someone else doing laundry, etc., I have yet to hear a single complaint. All I ever hear is how wonderful it is to have a long shower, or not have to wait 1/2 hour, etc. The days of my wife complaining about no hot water for the dishes because I took a long shower have ended! This is a true, self-modulating unit. People that have reported lights flickering and their TV having problems need to look at their house wiring. The unit starts softly, just like turning up a light dimmer. There are no flashing lights in this household. The only way I've ever been able to tell if the unit is running is to actually look at it - The display is only lighted when the unit is operating. Not to be overlooked is the energy savings. A tank heater will cycle 24/7, to maintain a tank full of hot water, even if you're on vacation. The tankless does absolutely nothing unless it detects water flow. Through an intelligent design EcoSmart units ignore faucet drips and won't send hot water to drippy faucets. The minimum flow to start the unit is 1/4 GPM. Hope this helps to quash some bad information and get accurate information posted. Dave.

Plenty of hot water

Bought the ECO 27. I am in a warm climate, 75-78 degree water inlet. I have the output set at 125 degrees. I have also removed all the water conserving devices in my showers. I live in a fresh water swamp, over an aquifer, so I don't care about saving fresh water, we have plenty of it. So I was worried about going tankless, because I have three showers, and all three push out over 4 gallons per minute. Since tankless are rated on a 1.5 gallon per minute shower, I was worried because one of my showers pumps out almost as much as three 1.5 water saving showers. I have had this a week, and have run 2 showers with it simultaneously (haven't tried all three yet). Hot steamy showers for both. I have a 200 amp service. I was worried because I have two central air conditioners, a pool pump, a spa pump, and lots of other demand. I was worried about tripping the 200 amp main. But I can ramp this unit up to full power, all three burners, with no problems. Also, no lights flickering or anything like that. I have a 60 foot run from my panel to this unit. So instead of going with 8-2 wire, I stepped up to 6-2 wire. Costs more, but I didn't want to have any problems with 8-2 wire over a long run. If you have a run of over 50 feet, I would recommend using the 6-2 wire. Using 3 double pole 40 amp breakers. The 6 gauge wire fits no problem into the connection points inside the unit, the only thing hard is getting 3 runs of that wire through the small 1 inch knockout. You have to strip back the Romex cover and just run the individual wires. I also used a conduit instead of the included clamp down, because I wanted the wires completely enclosed. On the panel side, I ran each run in separate 3/4 inch flex conduit, and inserted using 1/2 inch kockouts. The only complaint is that when this thing runs full out with all 3 burners cranking, it sounds like a 747 jet engine taking off. But not a problem for me due to the mounting location under a staircase, but would hate this thing to be installed in a bedroom or something. I like the fact that this unit uses standard 3/4 inch water heater connectors, and you don't need to use adapters and such like other models. Just standard 3/4 inch plumping available anywhere locally. One thing I noticed is that you really have to tighten the connections, or they leak. I first wrapped with teflon tape, and tightened how you normally would tighten 3/4 pipe thread, but the connections leaked. So I then used Reactorseal teflon paste, along with a couple wraps of teflon tape, and really tightened them hard (especially the hot output). I tightened so hard I was worried about stripping it. No leaks, but took lots of Reactorseal, teflon tape, and very tight. Doesn't seem right, but no leaking now.

Great little water heater but do your research!

After hours and hours and weeks and weeks of researching and reading reviews I chose the Eco 18. It was torture.. but I'm VERY happy with the Eco 18. I've had it for about a month and no complaints. But do your research.. You have to consider the inlet water temperature, your electrical box capabilites, the size of your home or potential for multiple appliances or faucets running at once as well as your faucet GPM (gallons per minute). I have a 2br/1ba home in South Western NC. I was concerned if I got the ECO 11 it would struggle in the winter or if there was more than 1 faucet or appliance running. However, the ECO 11 has the least amount of electrical requirements.. It just needs 1 breaker which is what I thought I only had room for 1 breaker. I was originally going to get the ECO 24 but I didn't have enough room in my breaker box for THREE breakers and it was probably overkill for my home but really didn't want any issues with not enough hot water. I didnt realize it but my existing water heater already took up 2 double spots in the breaker box so the ECO 18 was perfect. You also need to be aware of your faucet GPM or Gallon Per Minute. I read somewhere that if your GPM is too high it will not heat consistently or maybe not at all so I changed my shower head to a 2GPM shower head as well.. that also might be overkill. After all the research and debating the ECO 18 is perfect and fits perfectly on the wall in my small laundry room. I highly recommend!

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 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!) 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!

Very Happy with Ecosmart ECO 18

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!

ECO 11, 57 amp, 11 kw tankless water heater

I bought the Eco 11 and the aquapure pre-filter in Nov 2012. So it's 5+ years old and still going strong. We're a 2-person household and have 1500 sf house, single bath/shower, dishwasher, clothes washer. We never run anything at the same time as the shower so I can't say how it would do for multitasking but, for our purpose, it works great. I replace the pre-filter as needed and haven't had any problems with the heater. We have hard well-water with a high level of iron but I have 2-stage, 30 micron filters for the whole house (no softener), and the aquapure pre-filter does final cleanup. The water comes out of the ground at about 50F and I set the control to generate 112F output, so we do have to run the water for a couple of minutes for the 20-foot run to the plumbing wall. What I really love about it is that I was able to replace an electric 40-gal heater, that took up half of a 3' x 6' closet, with a unit that hangs on the wall and is about the size of a shoe box. Since this runs on a 60 amp breaker we did have to pull #6 AWG wire, which was kind of a pain, but that's my only complaint. I'm back on this page to check current prices for another one for my workshop, so I thought I'd add my review.

Be a professional, or have a professional install

I had a hard time finding a plumber or electrician to install a 27 model in central Montana. They are all stuck in past technology. Most of them swore this unit would not work. They insisted that my intake water temp was too cold, without ever testing it. I am 75 years old, and although I retired from the aircraft maintenance field I wanted a licensed professional to do the work in order to get the warranty, just in case. My water comes into my house at 55 - 57° winter and summer. My water comes from a deep community well with over 100 homes, so the water is constantly moving. It has been 2 years since my unit was installed and I haven't had the first problem. Its more than adequate for my two story home about 2000sf, two full baths, 2 showers can easily run at the same time. I frequently use an induction cooktop, microwave, airfryer and dishwasher, I have had no problems on a 200 amp system. I do make sure the induction cooktop and the microwave are never on at the same time. While I do notice the lights dim slightly when hot water is running in several places, I have never popped a circuit breaker. I strongly advise professional installation and the proper size unit for your climate. You must realize that this is a volume demand system and even tho the model 27 has three elements, seldom is more than one running at any given time. I would never own a home without a tankless water heater installed. Update, 3 years now, and not a hiccup! My plumber just finished flushing the unit. Very small amount of black sediment, and a tiny bit of calcium like scaling. He still recommends annual cleaning. Small price for added assurance.

Would never own another home w/o having an electric tankless system installed first!

We went through a bit of a hassle to get this installed professionally and properly; however, it was worth every bit! What I think Amazon needs to stress is that when a consumer is trying to determine what size unit is best for their home, the main, determining factor is the INLET WATER TEMPERATURE in your home, based on your geographical location. We live in Michigan, in the lower-thumb area on the East side. In the winter, our inlet temp is just above freezing, 38-40 degrees! Therefore, there is no other Ecosmart unit besides this one (27) that will work year-round here. This was a learning process for us. We originally bought the (11) model and had that one installed and it actually worked pretty well for all outlets upstairs; however, all outlets in the basement, where the unit is installed, just didn't have enough time to heat up before reaching the faucets because the inlet temp is just too cold here. SO, as a result of having to swap-out units to the larger (27), we did have to upgrade our electrical in the house from a 100 breaker box to a 200. This is obviously very pricey, but a good investment, nonetheless. I am lucky enough to have two very good friends who are licensed - one plumber & one electrician. Ecosmart does require the installation to be by licensed contractors in order to honor the lifetime warranty on the unit. We have seen a decrease in both our electric bills and our gas bills, on top of the increase in the value of the home by just having this system. The warranty is even transferrable to one subsequent homeowner! What a great selling-point if you intend to move at some point in the future! The only adjustment we have had to make is that now we have to let the water run for an average of 20 seconds before its hot; but, once it is, we never, ever run out! And, in a house with 2 adults and 2 teenagers; that, is priceless!!

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