State Water Heater Reviews (2021 Guide)

State Water Heaters might be a household name, but are they really worth considering?

Is it time to change out the old water heater? Maybe you’re considering a State Water Heater? State Water Heaters have a long history of great products that are energy-efficient and long-lasting.

Today, we’ve put together a complete State Water Heaters review. We’ll give you a bit of insight as well as help you choose the best unit for your needs. Let’s get started.

Our Top Picks

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Product Comparison Table

Product Image of the PROLINE® GS6-50-BRT
Best Gas Water Heater
  • Recovery time of 41 GPH
  • 40,000 BTU gas burner
  • Meets Low NOx emission requirements
Product Image of the PROLINE® EN6-50-DORT
Best Electric Water Heater
  • Non-cfc foam insulation
  • Recovery time of 21 GPH
  • Has self-cleaning dip tube
Product Image of the GTS-540-NIH Condensing
Best Tankless Water Heater
GTS-540-NIH Condensing
  • Gas or propane option
  • Uniform Energy Factor of 0.93

Why Choose State Water Heaters?

State Water Heaters may be a lesser-known brand, but that doesn’t make them any less worthy. They focus on high-quality materials and use advanced techniques to produce top-quality water heaters. This is the same both for residential and commercial use.

Homeowners who want to save energy will surely find a fitting unit among State Water Heaters’ vast choices.

Which State Water Heater to Choose?


State’s line of gas water heaters, ProLine, is efficient and reliable. The company made sure to use the same innovations and technology used for its range of industry-leading commercial units. The results are thoroughly tested and cared-for gas boilers that will serve a long life.

State’s ProLine includes several different water heaters. Some are powered by gas, while others require propane. Nonetheless, its wide selection makes it easier to find the perfect unit for you.

Their ProLine gas products are perfect for homeowners with a high demand for hot water. These water heaters are also built to last.

The top-notch tanks are designed by State, using commercial-grade parts. This increases their durability and reliability. All the tanks have State’s signature glass lining that prevents corrosion and rust.

Most of the tanks even include a self-cleaning system. This reduces the risk of minerals and sediments build-up — prolonging the tank’s life. Most are also fitted with a stainless-steel core anode for extra protection.

What’s great about State’s ProLine range are the warranties on both tank and parts. Additionally, most of their ProLine products offer extended warranty protection.


State Water Heaters has two lines of tankless units — condensing and non-condensing. Condensing units seem to be the favorite, so that’s what we’ll focus on today.

State’s range of condensing tankless gas heaters run on natural gas or propane. These are an excellent option for average families with a high-demand for hot water. They are available as residential or commercial, with a BTU input ranging from 120,000 to 199,000 an hour.

What we love about their tankless line is that all the products are Energy Star qualified and use PVC venting.

The utilized condensing technology is a clean and energy-efficient way to generate heat. As opposed to non-condensing units, these can save you a significant amount on your heating bills.

The system works by reusing the heat present in the exhaust and chimney. The unit then converts the heat into further energy. State’s tankless water heaters are fitted with either solid core PVC, CPVC, or ABS pipe.

Additionally, these tankless heaters are built with a durable heat exchanger. State constructs these from commercial-grade copper, which is not only more durable but more effective at transferring heat.


State’s electric water heater series is much like their gas line. Also branded ProLine, these units are made with the same cutting-edge technology and durability. State seeks to deliver products that are efficient as well as reliable.

There are plenty of products to choose from. These include their ProLine, ProLine XE, Master, Heat Pump, and Solar. They come in all sizes, but the most popular are the 40 and 50-gallon tanks.

Similar to its gas series, State’s line of electric water heaters also come with a generous warranty. Although they claim you might not need it, State gives you an opportunity to extend the warranty on most products.

These water heaters are excellent for those living in warmer regions. However, keep in mind that electric units don’t perform as well for high-demand use. If you do have a higher need for hot water, choose a bigger tank.

The Best State Water Heaters of 2021

By looking at user reviews and asking the experts, we managed to find our top picks.


Best State Gas Water Heater

The ProLine gas water heater is at the top of the game. It has a first-hour rating of 81 gallons and a good recovery time of 41 GPH. This particular model is a 50-gallon tank, which should be more than enough for the average family of four.

It promises to deliver an eco-friendly option, capable of reducing your energy bills. The unit features a 40,000 BTU gas burner and has a Uniform Energy Factor of 0.62. Although it meets the Low NOx emission requirements, it’s not Energy Star qualified.

One thing that stands out about this unit is the intelligent control logic included. It consists of an internal microprocessor which enhances its sensitivity. In turn, this improves the boilers heating response — delivering hot water faster.

The unit operates entirely independently, meaning that it doesn’t require an external power source. Instead, it utilizes a thermopile which is a small device that transforms thermal energy into electrical energy.

Additionally, it includes an LED status indicator. This monitors how the system operates and diagnoses service issues.

What’s more, the unit features a self-cleaning function. This consists of a powerful dip tube that reduces the build-up of lime and sediments.


  • Eco-friendly unit.
  • Fast hot water delivery.
  • Features a thermopile, eliminating the need for an external power source.
  • Fitted with a self-cleaning dip tube.


  • The user manual is difficult to figure out.

Additional Specs

Uniform Energy Factor 0.62
Recovery rate 41 gallons per hour
Measurements 60 inches by 21 inches by 21 inches
Energy Star Rated No
Warranty Six-year limited tank warranty


Best State Electric Water Heater

For a large family home with a high demand for hot water, an electric water heater is a reliable choice. The ProLine Standard unit is designed to maximize your hot water output. It does this while reducing standby heat loss with its environmentally-friendly insulation.

The insulation is made of non-CFC foam, so it’s non-toxic. The unit also consists of several heat traps which further prevent heat loss.

Although, not Energy Star qualified, the unit holds a 0.92 Uniform Energy Factor. So, it’s still a highly efficient water heater.

It uses commercial-grade dual 4500-watt heating elements, providing an even faster recovery time of 21 GPH. The heating elements are durable stainless steel, which should last you longer than standard copper elements. This unit also holds a first-hour rating of 62 gallons.

The warranty is not as long as the tankless models. It comes with a six-year warranty, which is still good for an electric water heater.

The Proline Standard is also very low-maintenance. It features a self-cleaning dip tube which helps to reduce sediment and lime buildup. It’s made from a PEX cross-linked polymer.


  • Maximizes energy efficiency while reducing standby heat loss with its non-CFC foam insulation.
  • Features powerful heating elements resulting in faster recovery time.
  • Relatively low maintenance with its self-cleaning dip tube.


  • It makes a funny, sort of straining, noise while working.

Additional Specs

Uniform Energy Factor 0.92
Recovery rate 21 gallons per hour
Measurements 60.5 inches by 20.5 inches by 20.5 inches
Energy Star Rated No
Warranty Six-year limited tank warranty


Best State Tankless Water Heater

This tankless water heater from State has earned an Energy Star due to its high energy efficiency. Upon purchase, you can choose between natural gas and propane.

It comes with a recirculation pump which helps to further provide instant hot water. This feature will only work in residential homes with a dedicated recirculation line.

The pump can be set to fit your hot water needs. For instance, set to turn off during the day when the house is empty — then turn on during peak time.

The heater has an integrated computer which modulates combustion created by the unit. This gives the boiler a Uniform Energy Factor of 0.93. It also means the unit meets the highest gas emission standards.

The GTS-540 uses up to 199,000 BTU per hour of natural gas. This should be ample to bring hot water to a home with three or four baths, depending on the climate.

The unit comes with a long warranty of 15 years. The condensing technology used will also further help you to save more by reusing heat from the exhaust.


  • Lets you choose your desired fuel — gas or propane.
  • Highly efficient and Energy Star Rated.
  • Allows you to set the pump as needed, minimizing energy waste.
  • Includes a 15-year warranty.


  • Requires annual flushing if you have hard water.

Additional Specs

Uniform Energy Factor 0.93
Recovery rate N/A
Measurements 23.625 inches by 17.75 inches by 11.25 inches
Energy Star Rated Yes
Warranty 15-year limited warranty

State Water Heater Comparison Chart

Product Award Uniform Energy Factor Recovery rate Measurements Energy Star Rated Warranty
PROLINE® GS6-50 Gas 0.62 41 gal/hr 60″ x 21″ x 21″ No 6-year (limited)
PROLINE® EN6-50 Electric 0.92 21 gal/hr 60.5″ x 20.5″ x 20.5″ No 6-year (limited)
GTS-540-NIH Tankless 0.93 N/A 23.63″ x 17.75″ x 11.25″ Yes 15-year (limited)

History of State Water Heaters

State Water Heaters, founded by Herbert Lindahl, Sr. started out as an entrepreneurial company in 1946. They began by producing wood and coal-burning stoves in a small garage in Nashville, Tennessee.

Not long after, State Water Heaters grew and soon became a leading company within the water heater industry. One of the reasons for this is because they remained steadfast in developing new material, technology, and innovative engineering.

There are a few landmarks throughout the history of State Water Heaters. These include 1948 where they produced their first electric water heater. Fast forward a few years to 1954 where they expanded to produce gas-fired units (1).

Their history continues:

  • 1956: This year came its first welded-steel galvanized tank.
  • 1957: Soon to follow came its porcelainized glass-lined tanks. We can still see this design in some of today’s water heaters.
  • 1979: State’s Sandblaster design was granted a U.S. patent for reducing sediment and scale build-up. They also introduced the first foam insulated tank.
  • 1996: During the 1990s, State continued to expand. They soon became the largest manufacturer, producing roughly 10,000 units a day.

Solar Power

State has created its first solar-powered water heater — The State Premier. It’s a complete solar system which is energy efficient, long lasting, and reduces carbon emissions.

The company wanted to create something for environmentally conscious homeowners. Water heaters account for about 25 percent of the energy used in the average home. Often, a large portion of this energy might be wasted due to heat loss.

A solar-powered water heater will receive 70 percent of its energy from the sun. The heater features top-of-the-line solar collectors. They are built using high-quality materials to ensure optimal efficiency and heat absorption.

The tank itself is also highly energy saving. It features three layers of insulation which retain the heat inside the tank and reduce standby-loss. The high insulation earns the Premier an R-value of 8 (2).

Where to Buy State Water Heaters

Many water heater brands are widely available on websites such as Amazon and Home Depot. State Water Heater units, however, are mostly sold directly through their official website, statewaterheaters.com.

State Water Heaters Customer Service and Reviews

You can contact State Water Heaters’ customer service directly through their website. Here you can either fill out a form or call the number provided (3).

Overall, customers are very pleased with State Water Heaters’ customer service. The few consumers who reported a faulty unit mentioned it was either replaced or fixed quickly.

There was one common problem reported with the tank gas-powered units, though. Some customers noticed an increase in their gas bill.

People who bought a tankless unit, however, were very pleased and surprised at how fast hot water arrived. They were also impressed with the lower energy bill.

Keep the Heat Going

State Water Heaters is a household name, and their products are definitely living up to the expectations. Starting out as a stove manufacturer in 1946, they’ve come a long way. Today they’re producing some of the most innovative water heaters, including their new line of solar-powered units.

Do you think a State Water Heaters unit would fit you? Leave a comment below if you have any further questions.

Headshot of Peter Gray

About the Author

Peter Gray

Peter has been a homeowner for 35+ years and has always done his own repair and improvement tasks. As a retired plumber, Peter now spends his time teaching others how they can fix leaks, replace faucets, and make home improvements on a budget.