Best Water Heaters of 2021

Get the right temperature at home with the right fit for your household

Our editors independently research, test, and recommend the best products; you can learn more about our review process here. We may receive commissions on purchases made from our chosen links.

Our Top Picks
"This water heater provides plenty of hot water for a family of three or four."
Best Electric Tankless:
Ecosmart ECO 11 at Amazon
"Works quickly while giving you a fine degree of control so you don't overheat your water unnecessarily."
Best Gas with Tank:
Rheem Natural Gas at Home Depot
"A frequent choice for larger homes or families."
"Heater offers continuous hot water straight from the pipes."
"When it comes to meeting the water needs of a large family."
"One of the largest tanks available on the market today."
"A multi-use water heater capable of being installed in many tight spaces."
"Designed to be used nearly anywhere there is a typical faucet hookup."
"You can connect to a hose or water tap for bathing or cooking."

All water heaters, as the name suggests, provide a home with a steady supply of hot water for cooking, bathing, and cleaning. Different designs and power sources, however, accomplish this task in very different ways.

In general, the major decision you will have is whether to go tank or tankless. Tank heaters keep a large supply of water heated for use, making them more suitable for larger homes. Since tanks store the hot water, they are susceptible to heat loss depending on the design and build materials of the tank itself.

Tankless options, on the other hand, rapidly heat up water using gas or electric heating elements as the water passes by towards the faucet. This makes them quicker while potentially limited in the amount of hot water they can supply at any given time.

We researched the best tank, tankless, gas, and electric water heaters on the market to help you find the right one for your home's needs.

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Best Electric with Tank: Rheem Elements Electric Tank Water Heater

Performance 40 Gal. Tall 6 Year 4500/4500-Watt Elements Electric Tank Water Heater

Electric tank water heaters use heating elements to keep the stored water hot until its needed. For small homes with smaller water needs, an electric tank can be the perfect option at an affordable cost. The Rheem Performance 40 Gal electric water heater has enough capacity for an average size family of three or four during daily water usage. Using a 240-volt electrical connection, the tank is capable of delivering up to 54 gallons of hot water during the first hour of use. The dual 4500-watt heating elements act quickly, making sure you have plenty of hot water whenever you need or want.

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Best Electric Tankless: Ecosmart ECO 11 Electric Tankless Water Heater


Electric tankless water heaters are the preferred choice of those who want a relatively maintenance-free and easy-to-install heater. Electrically-powered heating elements rapidly heat up water as it enters into the system, eliminating the need for a large tank and increasing the water’s temperature more quickly than similar storage options.

The EcoSmart ECO 11 Tankless water heater works quickly while giving you a fine degree of control over the temperature of the water. The self-modulating technology by EcoSmart controls the energy output of the tankless heater, making sure it produces the optimal results each and every time. Since it is tankless, the effects of its heating elements are easy to notice more quickly than a standard tank.

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Best Gas with Tank: Rheem Natural Gas

Performance 40 Gal. Tall 6 Year 36,000 BTU Natural Gas Tank Water Heater

The Rheem Natural Gas 40 gallon water heater uses a large tank that is big enough for two to four people for daily water needs. Using natural gas, the water heater features several advanced features to make installation and use simple. The push button ignition system makes the startup process quick and easy. Best of all, the six-year limited warranty will keep your water heater covered even when issues develop.

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Best Gas Tankless: Rheem Performance Platinum Indoor Tankless Water Heater

Performance Platinum 9.5 GPM Natural Gas High Efficiency Indoor Tankless Water Heater

A tankless, gas-powered water heater is a good way to have some of the best of both gas/electric and tank/tankless worlds. Offering the quick heating capabilities of all tankless options with the common lower costs of gas versus electricity, a tankless gas heater is easy to install in small spaces. Better still, since water rapidly heats as it enters the system from the gas-fed heat source, the system is similar to all gas heaters, making maintenance easier.

The Rheem Performance Platinum gas tankless heater offers continuous hot water straight from the pipes without the need for large tanks and storage. Using gas makes the tankless heater more energy efficient as well, saving up to $1,100 a year and 1,100 gallons of water a year at the same time. The small design allows it to fit in many small and tight spaces that normal tank heaters would not fit.

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Best Electric High Capacity: Westinghouse Residential Electric Water Heater

52 Gal. 5500-Watt Lifetime Residential Electric Water Heater with Durable 316L Stainless Steel Tank

One thing many people complain about most electric water heaters, regardless if they are tank or tankless, is the limited capacity to satisfy whole-home water needs. Whether you go electric or gas, since tankless heaters cannot heat up enough water for everyone to use at once, large families and homes require a storage tank to provide the water supply required for these greater demands.

When it comes to meeting the water needs of a large family, the Westinghouse 52 Gallon electric water heater is the way to go. With space for around three to five people, the large tank uses twin 5,500-watt heating elements made of stainless steel for extra longevity. Requiring a 240-volt connection, it is compatible with virtually all home installations when done by a professional service as well

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Best Gas High Capacity: Westinghouse Ultra-High Efficiency/High Output 10 Year 76,000 BTU LP Water Heater

60 Gal. Ultra-High Efficiency/High Output 10 Year 76,000 BTU LP Water Heater with Durable 316L Stainless Steel Tank

The largest homes with five or more people require a larger-than-average water heater. Tankless options fail to provide the necessary water supply unless you use several around the home in different areas. A large gas-powered water heater, on the other hand, can satisfy larger water demands from a single location. This can make your water heating setup more energy efficient and cost effective at the same time.

The Westinghouse 60 Gallon water heater is one of the largest tanks available on the market today. Made of stainless steel with multiple vents and advanced electronic controls, the tank is designed to be energy efficient and highly controllable in terms of water temperature. Two-inch thick foam around the tank keeps heat in and the surrounding area cool enough to store it near other items and equipment.

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Best for RVs: Bosch Thermotechnology Electric Mini-Tank Water Heater

Those looking to bring some hot water with them on the road will need to look at water heaters that shrink everything down in size. While tankless options are common for road warriors, a mini-tank water heater is the better choice if you plan on needing hot water for bathing, cooking, and outdoor activities. Since all RVs come in different sizes, it is also helpful to find a water heater that gives you different options to choose from.

Coming in several different sizes ranging from 2.5 to 7 gallons, the Bosch Tronic 3000 is designed to be a multi-use water heater capable of being installed in many tight spaces. Mountable on a shelf, wall, or floor, this makes it perfect for RV use when you want something small but functional to keep your water warm during cold nights. The electric heater uses 1,440 watts of power and should be installed professionally for the best results.

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Best Point Of Use: InSinkErator HWT-F1000S Hot Water Tanks

The primary limitation of most tankless water heaters is capacity. Instantly heating water up as it enters the system is good for single-use tasks like cooking or bathing, but the moment more than one person needs hot water, the tankless heater will fail. One popular way to overcome this challenge is with a point of use water heaters. Connecting straight up to a shower, sink, or other local water supply, these water heaters only heat up the water you need in that spot.

When you want a small but effective point of use water heater, the InSinkErator HWT-F1000S is hard to beat thanks to its combined heating and filtration systems. Designed to be used nearly anywhere there is a typical faucet hookup, the water heater electrically heats water to the desired temperature regardless if you use it in the kitchen, bathroom, or elsewhere.

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Best Portable: CAMPLUX ENJOY OUTDOOR LIFE Outdoor Portable Propane Tankless Water Heater

More and more people are spending time outdoors, even in the fall and winter when temperatures start to plunge. Having hot water can be important whether you are outside in your backyard or out in the wild camping. Portable water heaters can offer this instant heat with small, portable tankless designs you can connect to a hose or water tap for bathing or cooking.

Taking the hot water outdoors can be somewhat tricky unless you have something like the Camplux 5L Outdoor Tankless heater. This small low-pressure heater relies on the same heating principles as normal tankless options, rapidly heating water up as it passes along. The heater connects to standard water supplies, mounts to walls and other flat surfaces, and can heat up to 1.32 gallons of water per minute.

What to Look for in a Water Heater

Gas or Electric The choice between an electric and gas-powered water heater depends on a number of factors, including local utilities and your own personal preference. Electric water heaters are favored by people looking for low upfront costs and households that aren't set up with natural gas. While gas heaters are more expensive up front, they can save you hundreds of dollars a year, depending on energy costs in your area.

Tankless or Tank Tank water heaters keep a certain amount of hot water in a tank at any given time, ready to send to multiple appliances at once. Tankless water heaters quickly heat incoming water as you need it, and take up less space than a water heater with a tank. However, one unit may not be able to provide hot water to multiple fixtures at once, so you may need to buy multiple water heaters for your home.

Tank Capacity If you go the tank route, make sure that your water heater can store enough water hot to keep up with your family. While tank water heaters can provide water for multiple places at once, it will take longer to heat up new water than a tankless heater, which could leave you with an unexpected cold shower.

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