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But it's sufficient to support at least one shower, as long as the groundwater temperature is above 62 degrees Fahrenheit. As other EcoSmart models, you can set the temperature of your water supply from 80 to 120 degrees Fahrenheit using the digital temperature control feature. Before delivering hot water to your showers, sinks, or appliances, a tankless water heater must first warm the water to your preset temperature. To heat the water, tankless water heaters rely on fuel sources such as natural gas or propane, or heat water electrically by being hardwired to your home’s electrical system. A quality tankless water heater is space-saving and energy-efficient, heating only as much water as you need at any given time. We researched dozens of tankless water heaters, evaluating efficiency, flow rate, temperature control, ease of installation, and value.
Rianni Super HE+ Natural Gas Tankless Water Heater
The right one for your home depends on how big your family is and, therefore, how much hot water you’ll need. Gas water heaters are more efficient than electric water heaters in the long term, but electric heaters are generally less expensive to install. They also don’t require a ventilation system, which means you don’t necessarily need to put them in an area with existing pipes. Electric water heaters can be installed almost anywhere, even in small spaces. Tankless water heaters are relatively new home appliances that ensure you have piping hot water at the ready while taking up as little space as possible and using energy efficiently. Tankless water heaters can be up to 34% more efficient than a conventional storage tank-type water heater, which can save the average family $100 per year.
Featured Whole House Tankless Water Heaters
Increase that to twice a year if you live in a very cold area or if you consistently have hard water. Temperature rise refers to the difference between local groundwater temperatures and your desired hot water temperature. This then informs how much energy must be used in order to heat your water.
How to Install a Tankless Water Heater
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Priced a little higher than its closest competitors, at $649 for a 24kW water heater, it still makes a good impression. It produces up to 5 gallons of hot water per minute with 22,500 BTUs with an efficiency rating of 99%. Some consider a tankless water heater better than a traditional water heater because a tankless water heater runs more efficiently. A more efficient water heater means less energy use and a lower utility bill. A traditional water heater has to heat much more water than a tankless water heater, too. One drawback to electric units is its limited output, which tops out at 36 kilowatts, or about 123,000 Btus.
Water Heaters and Safety
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The temperature is also clearly visible on the easy-to-read LED display. Use The Home Depot Mobile App to see our selection of tankless water heaters and have it delivered to your doorstep. Yes, over time you can save money with a tankless water heater due to its increased energy efficiency.
EcoSmart is a trusted name for pool heaters, so they know how to heat water. This heater supplies up to 6.5 gallons of hot water per minute using 27kW of electricity. Although, if the inlet water is very cool, the hot water output can go down to about 2.7 gallons.
Best Gas Tankless Water Heaters Of April 2024
In addition, Jones points out that most people should set the temperature between 110 and 120 degrees F for the sake of safety. This model retails for under $650, which is a good value when you consider its performance and long-term savings from its energy efficiency. Gas-powered tankless water heaters need to be properly ventilated to work effectively. Tankless water heaters generate exhaust gases, so it’s important to vent them to the outside of your home to prevent the buildup of harmful gases like carbon monoxide. The first thing to decide when choosing your electric tankless water heater is whether you desire a whole house or a point-of-use heater.
It offers a flow rate from 1.5 GPM to a maximum of 5.9 GPM, depending on temperature rise. RTEX-24 is a smart choice if you need to call for two sinks and one shower or two showers at once. When the inlet water temperature is around 60 degrees, it is capable of heating over 2.5-Gallon per minute with an output temperature of 105 degrees. This capability is equivalent of one sink and one shower head (with a 1.5 GPM flow). It takes a big burst of BTUs for a tankless heater to turn cold water into hot water in just a few seconds. But if a heater’s Btu output can’t keep up with demand, it will cut back the flow, or, worse case, deliver lukewarm water.
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Temperature is adjustable in one-degree increments and it’s able to provide up to 3.17 gallons of hot water per minute. Condensing units tend to cost more than non-condensing units but also run more efficiently than non-condensing units. The additional heat exchanger adds to the cost of a condensing tankless water heater. Non-condensing units need proper venting to handle higher temperatures. Gas-powered tankless water heaters can vary in cost based on the amount of British Thermal Units (BTU) they can put out.
Compared to regular water heaters with tanks, the flow rate of tankless water heaters is lower. Flow rates range from around 2.5 GPM for smaller units, with much larger units reaching up to 11 GPM. The water can reach 140°F, however, this will be lower in much colder climates. The temperature can be changed, if need be, in one-degree increments by simply turning the controller.
Manual controls allow temperature adjustments from 80 to 140 degrees Fahrenheit. Its 44,358 BTUs provide 3.17 gallons of hot water per minute using just one 60 amp breaker and 240 volts. Versatility is why we chose the Rheem 18kW Tankless Electric Water Heater for our second spot. At 18 watts, it produces 61,419 BTUs which makes it useful as a point-of-use heater or as a whole house heater for a family of two. Up to 4.4 gallons per minute of hot water can be ready at a moment’s notice. As an industry leader for almost 100 years, Rheem backs it all up with a five year warranty on heating components and a year on other parts.
If upfront prices are a concern, considering a point-of-use heater as an alternative to a whole house heater, may be a viable solution. By far the most popular benefit to having a tankless water heater is its energy efficiency. In fact, despite its high upfront cost, a tankless water heater will pay for itself in a couple of years thanks to lower energy bills and a long lifespan. The first natural gas fueled water heater on our list is the Rinnai RU160iN Model Series, tanking our sixth place spot.
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