A tankless water heater looks to be nothing more than a simple gray box that hangs on the wall. Best of all, it has a lifetime warranty on the unit itself, which is by far the best warranty on the market. Overall Review Ratings: All things considered, this is an excellent electric tankless water heater for most households with average hot water needs. And a handy feature that detects scale buildup will shut the appliance down rather than risk overheating damage caused by a buildup of mineral deposits. Best Electric Tankless Water Heater Reviews Stiebel Eltron Tempra Plus 36 KW – Most Powerful Model on the List The 36 KW Tempra Plus is a massive tankless water heater from the German brand, ideally suited for large homes/families. The RTEX 13 is also cheap enough that energy savings will pay for the whole thing fairly quickly into the process–one reviewer claimed that it paid for itself (unit and install cost) in 17 months! Best Electric Tankless Water Heaters 2020: 1. Ecosmart is a very popular and trusted electric tankless water heaters brand. That’s because those buyers didn’t read the fine print, and invalidated their warranties by performing self-maintenance. So, if you actually need 4 gallons per minute, you’ll actually want to look for a 5 or 6 GPM to compensate. One of these heaters is suitable for a small home, whereas two can provide enough power for a large home. Under optimal water temperature conditions, it can provide up to 8.4 gallons of heated water a minute. The ECO 27 is largely well-reviewed; even the people with warranty issues note that their units worked well when they were repaired. Manufacturers provide sizing and temperature rise information to help you make your selection. The RTEX13 hasn’t been on the market very long, but it seems much more rugged, and so far has a perfect reliability record! IHEAT S-12 (Best for Warm Climate Areas) This is the best electric tankless water heater for beach or field houses or any environment where temperatures are a bit higher and the air might be corrosive. It can also be plumbed in line to supplement a separate tankless water heater, taking some of the load off of it, an especially useful feature to help supply high-demand fixtures far from the tankless heater. You can take the appliance out of the “vacation” setting ahead of time and fire it up for a hot shower when you arrive or shut it down remotely. It’s one of the most compact options out there, and it fits in tight cramped spaces very easily-even in a small cupboard, or above the sink. (Some manufacturers void the equipment’s warranty if it hasn’t been installed by a licensed professional.). All three of these units are a well-made and well-designed. The appliance’s flow sensor and circuitry adjust the output to meet demand. This one is a great choice for a larger household (two or three bathrooms) with high demand for hot water. This unit is “ultra compact,” so it can be installed practically anywhere, which, again, is a nice benefit for smaller residences. It’s also good to ask yourself whether you want to have to think about rationing your usage at all. 4. When the groundwater temperature drops to 36 degrees, this electric tankless water heater can provide up to 3.5 GPM of endless hot water. That’s one of the best turnover periods out there. There are also very small tankless and mini-tank models that can be installed right where they’re needed, such as under the counter at a sink that’s far from the main water heater. And if for some reason it turns out that you need more capacity than this appliance can provide (unlikely given its efficiency and capacity to supply up to 10 gallons of heated water per minute), it comes from the factory engineered to be linked up to three other heaters without complex accessories or parts kits. Stiebel Eltron DHC-E 12 is the best small and affordable electric water heater. After all that, the result is nice warm water, and as much of it as you’d like. It’s a very smart design. It is also chosen by many because it can offer solid performance without interruptions. When it comes to tankless water heaters, you want only the best.Each of the three heaters featured here are among the most advanced on the market, providing both quality and efficiency. The beauty of a tankless water heater is its ability to provide a continuous supply of hot water. The Tempra Plus is the best whole house electric tankless water heater available today. This unit is “ultra compact,” so it can be installed practically anywhere, which, again, is a nice benefit for smaller residences. We may earn commission if you buy from a link. Always read the fine print, and make sure you’re going to be covered for the long term. Popular Mechanics participates in various affiliate marketing programs, which means we may get paid commissions on editorially chosen products purchased through our links to retailer sites. Its self-modulation feature detects water flow and adjusts its power output to meet demand, saving electricity. It falls just about in the mid-range of prices for a tankless water heater, and is Energy Star certified. And as to its size, use the manufacturer-supplied dimensions to be sure that it will fit where you intend to install it. Overall: This is the best high end electric tankless water heater out there designed for high-demand residential use. Read honest and unbiased product reviews from our users. How Can I Get The Most Out Of My Tankless Water Heater? In fact, many buyers used it as their sole water heater for lake houses, cabins, or other vacation properties.  And the price is, comparatively, quite reasonable. A poorly vented bathroom (and most are) is a major source of mold and damage related to the effects of moisture vapor condensing on and in wall surfaces, grout, on windows, and ceilings. This one is an ideal choice for a one-shower-at-a-time household, or for homes with dual showers that are equipped with 1.5 GPM (low flow) fixtures. Do I need a Professional to Install my Water Heater? If you’re in a particularly cold spot, we recommend rounding your supply needs up by at least 30%, closer to 50% if you like to be absolutely assured of having supply. Think about that if you are having a tankless installed in a vacation home. It’s always a good idea to check your inlet temperature before you buy, especially if you live at high altitudes or in far northern regions. And, as with the Stiebel, that means increased efficiency and increased energy savings on your bill! Purchasing an electric water heater is an excellent and economical choice if you are in the market for a new water heater system. If you do not have a gas line, then you can choose propane. This model is designed to be installed under the sink to save space. The Ecosmart also adjusts its power usage and pressure settings to keep a consistent output for you. Many folks will also find that it’s a convenient single-room option for a guest suite or washroom. You’ve got this cabin on the lake, and you’re tired of not being able to take a decent shower after a day of water skiing or mountain biking. Pros:  It has a maximum flow rate of 4 GPM, which is a lot for the price. For electrical appliances, this activates the circuit to energize a heating element, which warms the water directly. It’s one of the most reliable systems out there, and it’s super space-efficient. Just as with gas-powered models, electric systems will save lots of money on your energy bills, and give you constant hot water on demand without the limitations of a tank! One reviewer cautioned against taking Ecosmart’s performance claims at face value, noting that it did not heat sufficiently at 3 GPM in cold inlet temperatures. A tankless water heater is a heating element (either gas or electric) that connects directly to the home’s water pipes. Imported from Germany, the Stiebel Eltron Tempra Plus 36 has an innovative design and outstanding build quality. Many negative buyer reviews for these units revolve around difficulties in qualifying for the warranty. To do that, consider the largest demand that the appliance will regularly have to meet (i.e. That’s because a hot water heater that’s installed in a colder spot will have to work harder, which then lowers its overall output capacity. We considered those fired by natural gas or propane and ones that operate on electricity. It’s a good option for medium-size households with more demand or a colder climate to deal with than the Rheem can handle. How we test gear. Some buyers weren’t as impressed by the automatic management system as others. Other aspects of this low-cost appliance make it appealing, such as its 6.6 gallon-delivery rating. There’s some fine print, so you’ll have to be careful to register your unit properly and install it according to the manufacturer’s instructions. Ideal for small or mobile homes, the V65IN is a mid-price appliance that the manufacturer rates as being capable of serving up to five different fixtures at the same time. A couple of reviewers thought it didn’t work as well in the cold as the company claimed, and one reviewer noticed a temperature drop with the dishwasher and the shower on at the same time. If you live with one or more other people, you should probably assume that someone else will need at least some hot water at the same time you’re taking a shower. Some mechanically gifted people install tankless water heaters themselves, but most are installed by a licensed professional, usually a plumber. Features: Gas and propane available both; This unit is able to be powered by both natural gas and propane. It has a similar modulating control system to that of the Stiebel. It’s ideal for medium-sized homes and for smaller installations in colder climates. Best Electric Mini-Tank Water Heater 1 Ecosmart ECO MINI 2.5 2.5-Gallon 120V Electric Mini Tank Water Heater. Not bad for a day’s work. That makes this one ideal for high-usage applications where you don’t want to have to think about rationing hot water usage. Add up all your GPM (gallons per minute) usage requirements for a maximum usage scenario that you can use while you’re choosing your new equipment. Best Tankless Water Heater Reviews for Instant, Hot, On Demand Hot WaterÂ. Just be prepared to spend more money and set aside more space. When you’re done using hot water, the appliance senses the lack of water flow and turns off the heat, saving energy. Features: ELECTRIC TANKLESS WATER HEATER: 9.5 kW under-sink tankless water heater designed to provide an endless supply of instantaneous hot water to one or more sinks EASY INSTALLATION: Can be installed in a 360 degree orientation so you can position the unit in tight under counter spaces for a flexible, worry-free setup Gas tankless models may have different venting and gas-supply requirements, meaning you may need to increase the diameter of the pipe from the water heater to the gas meter. 120v Electric Tankless Water Heater. And as to fuel-burning versus electric, if you’re replacing a tank water heater, you’ll probably use the same energy source. It produces a steady stream of hot water, but only at a single temperature. That’s a great output rating for the price. This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. Other sensors and circuitry guard the appliance against overheating. It’s just as efficient, rugged, and space-efficient as its predecessor. This one is priced close to many gas units, though it is more powerful than gas units that cost roughly the same amount. There is a good chance you have heat of a tankless water heater and as the name suggests, a 120V tankless water heater is powered by electricity. People in warmer climates can therefore get away with buying units with a lower gallons per minute (GPM) output, or at least get to enjoy more reliably high-flow rates that people in colder climates. Retrofitting them into an older, less energy efficient house that was originally designed for a tank type water heater can sometimes be complex, accounting in part why installing one can be expensive to the point that its econonic attractiveness is reduced. We chose this range of water heaters to give you a cross section of these appliances in terms of physical size, price, capacity, energy source, and mechanical characteristics—such as mineral scale sensors or the ability to be linked with other tankless heaters. So, regardless of the type of tankless water heater you have, you’ll be out of hot water in the event of a power outage. If you have a compact home, you are likely to find that a regular water heater is too big and bulky. Whether installed as a point-of-use unit, or a whole house water heater, it provides a continuous supply of hot water and it’s nearly 100%energy efficient. Some reviewers reported hassles in qualifying for the lifetime warranty. For most of us, the Tempra is the better choice for high demand. Keep reading to find the right one for you! If you can reduce the draw from each fixture by even 25%, that will add up quickly as you start to consider multiple draw scenarios. This Rheem is a great choice for smaller households (1-2 people) without a tremendous demand for hot water, or for bigger households willing to do one hot water task at a time. multiple showers at once). It’s also physically small and relatively light, weighing 58 pounds. If you are willing to invest in a more seamless experience, the Steibel can handle everything you might throw at it, from cold weather to high demand. To do that, we relied on our expertise from past coverage and testing of home appliances to research which heaters could serve your needs best. If you’re in a consistently warm spot, you may be able to save some money by opting for the cheaper Ecosmart. The Tempra 29 Plus will automatically adjust in real time by slightly lowering the water pressure, preventing uncomfortable temperature fluctuations when you’re trying to get clean. If you live in cold climates in the north of the US and can’t use natural gas or propane, the best electric tankless water heater for the whole house is Ecosmart 36 – the most powerful unit from the line. The Tempra does a very good job of compensating, but it’s not a miracle worker. Ecosmart claims the ECO 27 can heat 3 GPM in the coldest of inlet water temperatures (37 degrees), and 6 GPM in warmer climates. Ecosmart ECO 27 kW is the second most powerful Ecosmart electric tankless water heater, following the Ecosmart ECO 36 kW. Each unit has its own installation and conversion demands, and you should be aware of those costs as you work out your budget. Before you buy an appliance, check with the technician who will install it and verify whether you’ve correctly sized it. In order to choose the proper tankless water heater for long-term use, you should know about other options too. Tankless.reviews is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. It has a maximum flow rate of 4 GPM, which is a lot for the price. Your success with any of them will depend on picking the right one for your usage requirements. This variety takes up less space, is more energy efficient, and guarantees everyone in the house gets a hot shower. Next, consider whether the appliance can heat the incoming water enough (called temperature rise) to meet that demand. If you need a compact solution for small-scale use, though, we don’t think you can do any better! The appliance works in the suburbs, too. As we’ve said, though, it’s not ideal for larger households which regularly run multiple hot water draws at once. Marey ECO150 220V/240V-14.6kW Tankless Water Heater with Smart Technology At close to $850, the only big downside to this unit is the price, which is on the higher side for tankless electric heaters. Find helpful customer reviews and review ratings for Ecosmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology,White at Amazon.com. If you live alone, this probably isn’t a big concern, unless you like to run an appliance while you shower. Not a typical tankless water heater, the Bosch ES4 tucks under a counter or inside a cabinet and plugs into a standard wall outlet to provide all the hot water that sink will need. It has a three-year warranty on parts, which is better than most others on the market. It is designed to offer endless hot water supply to one major application at a time, but your home must have a minimum of 200-amp service to run the unit efficiently. And many tankless products can be controlled remotely via an app. The Titan SCR2 N-120 runs of 220 volts and can operate quieter versus other models on the market do. The colder the incoming water, the harder the appliance must work. It’s probably overkill for smaller applications, but if you want the absolute best of the best for your smaller house and can afford the Tempra, we have a hard time finding any reasons why you shouldn’t buy this model. You will probably have to limit yourself to one shower at a time if you don’t have low-flow fixtures installed in your bathrooms. That’s a lot of hot water, and it would be unlikely that you need more. It’s one of the most compact options out there, and it fits in tight cramped spaces very easily-even in a small cupboard, or above the sink. 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