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The compact design saves space and allows you to install the unit in non-traditional spaces such as the basement, utility room, attic, garage, or even a closet. Don’t be worried about the hot water even you have a long shower time. It delivers hot water for up to 3 faucets, two showers simultaneously.
The 9 Best Tankless Water Heaters of 2024
Flow rates range from around 2.5 GPM for smaller units, with much larger units reaching up to 11 GPM. There are two versions available—this 2.5-gallon model or a slightly more expensive 4-gallon unit at the same size—both with high thermal efficiency designed to keep costs down. This little electric unit is far from a whole-house water heater, but it’s great for use at a single sink or for supplying a condo, RV, or summer house with hot water.
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Price
Higher temperatures can scald or burn, especially for children or the elderly. It should be noted that the performance of a whole house no-tank model varies depending on weather and situations. In warm regions, the flow rate and temp range are high, while in cold areas, the same model turns into a low rate water heater.
Best 7 Tankless Water Heaters: Our Top 7 Picks
If someone had showered before me or if the dishwasher was running, I dreaded hopping into that icy cold water. Kat is also the commerce editor-at-large at Thomas-Xometry, the leading U.S. online platform for supplier discovery and product sourcing. To find the best tankless water heaters Kat reviewed multiple models, researching factors such as each water heater's dimensions, flow rate, and total BTU. She also spoke to Andrew Miles, a New York City-based Licensed Master Plumber at WaterFilterCast. Tankless water heaters can cost anywhere from $300 to $3,000, with prices varying depending on factors such as fuel type, capacity, brand, and any additional features.
The Eemax 27kW Electric Tankless water heater easily makes our list with its whole-house water heater for a family of four or five for $479. Hot water production ranges from 3 to 7 gallons per minute with adjustable, single-degree accuracy from 80 to 140 degrees Fahrenheit. Electrical use is kept in check by adjusting power demands based on water flow. With its self-modulating technology, this Rheem tankless water heater will adjust the amount of energy it uses based on the home’s water consumption, helping to further save money. The Rheem 8 GPM tankless water heater takes up a fair amount of space in the electrical panel.
Is a tankless water heater worth the cost?
Satisfied customers that we observed liked this product’s efficiency, ease of operation, temperature control, and savings. ECO 18 uses EcoSmart’s advanced self-modulating technology, which means it only uses energy when water needs to be heated. The unit comes with digital temperature control that enables you to adjust the water temperature in increments of 1 Degree.
However, in simple words, you would need something between 4 and 6 gallons per minute capacity for a family of three. Here, I would also suggest you make sure that it is equipped with self-modulating technology, so you can reduce operational costs to a great extent. For this purpose, my favorite across the market is EcoSmart Eco 11, as it is equipped with a fairly decent flow rate and precise temperature controls that facilitate you well. Last but not least, when it comes to construction, it is quite impressive that, at such a price, the manufacturers have added stainless steel exchangers and pipes.
The Thermomate range also offers low-cost electric tankless water heaters at 11kW and 27kW, providing money-saving solutions for a variety of hot-water demands. The EcoSmart ECOS 27 electric tankless water heater is a compact unit that still offers competitive performance with a maximum of 6.6 GPM. It also has a minimal activation requirement of 0.3 GPM, so users don’t have to turn faucets on full power to get hot water. A less responsive electric water heater would waste water and electricity used for heating, but this one provides optimal control. We researched the best electric tankless water heaters in a variety of categories and chose options with high customer satisfaction. Examples of features we ultimately considered are maximum temperature, maximum flow rate, efficiency rating, and special features included by the top brands.
I would install this in showers far from the main heater so I don't have to wait for the water to heat up. This unit achieves peak energy efficiency by self-modulating the power output. It detects the water flow requirements of running faucets and adjusts the power output to use only what’s needed at that moment. This electric tankless heater self-regulates energy consumption throughout the day, so it won’t drive up your electric bill as much. Adjusting the output temperature is simple; a built-in digital control allows you to set the temperature in increments of 1°F from 80°F to 140°F. It’s sturdy with a precision-engineered design, and the company backs its product with a 12-year warranty on the heat exchanger—a testament to its confidence in the product.
Therefore, if you install a high energy-efficient type model, you can save a lot of money each month on your heating bills and your water bills. Furthermore, a 36 kW electric tankless water heater is just enough for three persons to shower at the same time. If the temperature of the hot water drops too much when traveling from the water heater to the respective shower head, it’s not going to be a good shower experience. For two persons showering simultaneously, an electric tankless water heater needs to have around 5 GPM of water flow rate.
Operation is simple, with a clear display and large dial offering control in single-degree increments. Brass-topped heating elements offer high durability and are easy to replace should the need arise. This Rheem model is an 18kW unit requiring a 240V supply and two 40A breakers. Since gas water heaters aren’t connected to your electrical system, they’ll still work if you experience a power outage. Electric heaters will still allow water to flow through them, but their heating element won’t work unless you have a battery backup. Take care when adjusting the temperature settings of your tankless water heater.
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