Reliance Tankless Water Heater Reviews: Are They Worth Buying 2021?

If you plan to purchase a new water heater for your office or home, then Reliance is a solid company to consider.

Many units of Reliance have a self-cleaning feature that eliminates the tension of maintaining the machine.

The brand also equips all of its items with contemporary technology such as Piezo ignition and blue steel lining, so you can be certain of getting great value for your hard-earned money when you buy a Reliance appliance.

Their models are energy-star compliant and reasonably priced. With Reliance tankless water heater, you can enjoy decreased expenses on standard water heaters and save a considerable amount of money.

This guide will tell you everything you need to know about the Reliance Company.

History of Reliance Water Heater Brand

This organization was launched in 1981 as part of the State industries.

Then AO Smith bought it in 2001. They continued to work as a full subsidiary.

It does not have the reputation of AO Smith; it is reputed for manufacturing some of the most eco-friendly devices in the industry.

They integrate cutting-edge technology in their designs and development process to produce high-quality units.

Their loyal consumers know that having a reliance gas water heater review means dependability and quality.

Currently, they make both residential and commercial water heaters and water pump containers.

AO Smith made $3 billion in 2017, and only home improvement and state stores sell their products.

Today, the company has invested in the manufacturing of tankless devices and gas and electric tank units.

Their tankless machines are energy-star compliant and can lower the lime and sediments accumulation in the boiler.

Types Of Reliance Tankless Water Heater

Reliance distributes an extensive array of water heater types that will meet your needs and preferences. They offer the following types of heaters:

Gas Water Heater

If you have a large family, you should opt for a gas water heater because it supports energy conservation with its slow heating procedure.

They permit you to control the heating extent and rate. They don’t need electricity to operate, which means you can save money on water and electricity bills.

Also, they provide an unlimited supply of hot water for the whole house.

They offer both small and tall gas water heaters, depending on your requirements.

So, whether you own an apartment or a spacious house, you can find the right size and capacity of the gas device by Reliance gas water heater review.

Electric Water Heater

Their electric machines are available in several models and sizes, and they are covered by 6 to 12 years’ warranties.

The units with an extended warranty of 12 years are an exceptional choice because they provide rust protection and use superior quality elements and features, including a self-cleaning system and durable anode. 

The traditional and tall Reliance electric water heater reviews use two heating elements that provide an energy efficiency rating of 0.9 and faster recovery.

Hybrids or heat pumps with electric elements and heat pumps boast an energy factor of 2.3, so they are ultra-efficient and energy-star compliant.

Many individuals choose electric units because they are easier to install and handle.

Also, the amount of energy they need to heat the water is cost-effective.

Best of all, there is no problem of carbon monoxide emission and fuel combustion, so you should not be concerned about ventilation.  

Tankless Water Heater

The Reliance tankless machines don’t use the storage container but a heat exchanger.

So, you can obtain on-demand warm water and an infinite and constant supply of hot water.

These appliances are small and compact, so you can install them easily and save a lot of valuable space.

The high-efficiency functionality is its notable feature, especially condensing type, which features an extended warranty of 15 years.

Reliance tankless water heater reviews have various safety and internal freeze protection features.

Furthermore, the heaters that are intended for indoor usage come with a direct conversion kit.

Reliance Tankless Water Heater Reviews

Reliance TS 540 GIH 199K Indoor Tankless Natural Gas Water Heater9.8

Reliance TS-540-GIH 199K Indoor Tankless Natural Gas Water HeaterFeature:

  • 12-year limited warranty on heat exchanger
PriceRead our Review
Reliance Water Heater TS 540 LIH 199K LP Reliance Condensing Propane Gas Tankless Water Heater9.5

Reliance Water Heater TS 540 LIH 199K LP Reliance Condensing Propane Gas Tankless Water HeaterFeature:

  • 95% energy-efficient
Reliance 6 2 SSUS K 2.5 Gallon Electric Water Heater9.5

Reliance 6 2 SSUS K 2.5 Gallon Electric Water HeaterFeature:

  • A 120 volt and 1500 watts stainless steel heating element
Reliance 6 6 SOMS K 6 Gallon Compact Electric Water Heater9.5

Reliance 6 6 SOMS K 6 Gallon Compact Electric Water HeaterFeature:

  • Designed for under sink or crawl space deployment

1. Reliance TS-540-GIH 199K Indoor Tankless Natural Gas Water Heater – Best Overall

It is one of the most dependable gas water heating systems anticipated for residential usage with existing natural gas lines.

Best Overall
Reliance TS 540 GIH 199K Indoor Tankless Natural Gas Water Heater

Reliance TS-540-GIH 199K Indoor Tankless Natural Gas Water Heater


  • Energy star certified
  • Energy factor of 0.91
  • Stainless-steel secondary heat exchanger
  • 12-year limited warranty on heat exchanger
  • 5-year warranty on parts

This energy star certified unit has an energy efficiency rating of 91%. It can support three major appliances or showers simultaneously.

Integrated condensing technology enables the water that travels through the machine to come up to temperature faster without using as much gas as other devices do.

Moreover, the 199,000 BTU appliance uses as much gas as required to heat all the water you need.

We have added it to our list because of its higher flow rate of 10 gallons per 60 seconds, which is higher than other alternative models available out there.

This product needs 3 or 4 inches vents; Reliance made it to work with vents made of diverse substances to guarantee that those vents provide the security that your family needs and that the vents will look great with your house’s interior.

Best of all, it has a digital screen that showcases the water temperature and gives you ingress to extra settings.

Also Read: Best Tankless Water Heaters


  • Power Source: Gas powered
  • Item Dimensions: 25.6 x 18.5 x 12.4 inches


  • Eligible for the federal tax credit
  • Includes internal freeze protection and various safety features
  • High energy efficiency rating


  • Must be installed by a professional plumber

2. Reliance TS 540 LIH 199K LP Condensing Propane Gas Tankless Water Heater – Great Value

The reliance gas water heater review is powered by wind and delivers up to 8.4 gallons of water per minute at 45 degrees Fahrenheit.

Great Value
Reliance Water Heater TS 540 LIH 199K LP Reliance Condensing Propane Gas Tankless Water Heater

Reliance TS 540 LIH 199K LP Condensing Propane Gas Tankless Water Heater


  • Energy star qualified
  • 95% energy-efficient
  • No standing pilot
  • Designed for indoor deployment

It can support 3 appliances or showers at the same time. To ignite the burner, it requires 0.5 GPM, and its maximum input is 199,000 BTU per hour.

With this unit, you can install vertical or horizontal venting. Besides, the company has installed a built-in freeze protection system to ensure your and your family’s protection.

The digital display shows the input and output temperatures. Its energy efficiency rating is 95%, and it is energy-star qualified.

Furthermore, it is backed by a 12-year heat exchanger warranty and 5-year parts warranty.


  • Power Source: Wind powered
  • Item Dimensions: 15.72 x 21.97 x 33.39 inches


  • Generates 8.4 gallons in one minute
  • 12-year heat exchanger and 5-year parts warranty
  • Supports 3 appliances or showers at once


  • Requires professional installation

3. Reliance 6 2 SSUS K 2.5 Gallon Electric Water Heater

Reliance electric water heater reviews is a small and compact appliance, which allows you to hang it at your desired corner in the house.

Premium Choice
Reliance 6 2 SSUS K 2.5 Gallon Electric Water Heater

Reliance 6 2 SSUS K 2.5 Gallon Electric Water Heater


  • Have a water flow rate of 2.5 GPM
  • A 120 volt and 1500 watts stainless steel heating element
  • 6-year tank warranty
  • 1-year parts warranty
  • Meets NAECA codes

It can produce only 2.5 gallons of hot water in one minute.

If you have a small family, it is an excellent choice for you as it can distribute the warm water in the whole house.

We loved it because of its easy installation process.

Another noteworthy feature is that it has factory-made temperature and pressure valves, making it more reliable for prolonged usage.

You can be sure of its greatest quality as it comes with a 6-year tank and 1-year parts warranty.

It boasts one 120 volts and 1500 watts heating element constructed of stainless steel. It is an excellent long-term investment.

Also Read: Best Rheem Tankless water heaters


  • Power Source: Battery powered
  • Item Dimensions: 17.3 x 14.5 x 18.5 inches


  • 2-inch foam insulation
  • Heats water in a flash
  • It can be installed anywhere in the house


  • Low capacity
  • Intended for smaller homes

4. Reliance 6 6 SOMS K 6 Gallon Compact Electric Water Heater 

Homeowners who have this Reliance tankless water heater reported they really liked the way it heated cold water.

Reliance 6 6 SOMS K 6 Gallon Compact Electric Water Heater

Reliance 6 6 SOMS K 6 Gallon Compact Electric Water Heater


  • Designed for under sink or crawl space deployment
  • Provides 6 gallons of warm water
  • 6 years warranty
  • Factory installed temperature and pressure relief valves

It supplements other water heaters and is super-easy to install, thanks to its side ports that bring the water in and supply perfectly warm water.

If you don’t want to waste your time waiting for hot water, it is the fastest solution for you.

This 6-gallon electric water heating system is compact and can be fixed beneath the sink or anywhere you want.

It comes with great innovation and hosts two different inlets for hot and cold water on the side.

Its small size and 6 years warranty make it a valuable purchase.

On top of everything else, it is also very pocket-friendly, so even if you have a restricted budget, you can buy it without any hesitation.  


  • Power Source: Electric powered
  • Item Dimensions: 15.25 x 14.12 x 14.12 inches


  • Durable glass-lined tank
  • Inlet and outlet connections for effortless installation
  • 1-inch foam insulation


  • It may not work with water softeners
  • Requires a cord kit or permanent installation

How To Buy The Best Reliance Tankless Water Heaters?

Before purchasing a device, first, determine what type of unit is best for your individual needs.

Take into account the features of each water heater type and then decide whether you should buy an electric, gas, or propane machine.

Each type has its own perks and downsides, so you need to evaluate these cautiously.

On the other hand, you have to consider other factors such as the size, the installation location, and venting.

Venting is one of the most significant things you need to consider with gas devices, while energy efficiency is the biggest concern of electric units.

If you want to save money on your purchase, check out several online stores for promos or discounts on each type of heater.

Check the promo’s validity and make sure you understand all the details included in the terms and instructions provided by the store.  

Warranties Of Reliance Water Heaters

The biggest perk of purchasing Reliance units is that all of their models have a warranty.

Mostly, the warranty is offered for both the components and containers if failure results from engineering defects.

The exact warranty differs depending on the product.

For example, residential electric machines feature warranties of 3, 6, 9, and 12 years.

Residential natural gas and propane units are backed by 6, 9, and 12 years warranties. All residential hybrid heaters have 6 years warranty.

Moreover, the residential tankless models come with a 10-year warranty. Some of the residential heat pump units also have 10 years warranty.

Features Of Reliance Hot Water Heater Reviews

  • They offer both indoor and outdoor models.
  • Their devices are suitable for space heating and heating drinking water.
  • Standard ¾ gas connection makes their deployment effortless.
  • A freeze protection system protects the appliance against low temperatures only if the energy power is delivered and inside components.
  • Electric ignition permits a dependable start.
  • The computer board controls water and gas valves, so the product can generate warm water with accurate temperature and decreased fluctuation.
  • The self-diagnostic system is installed for safety, quick, and easy troubleshooting.
  • The numeric error codes are displayed on the remote controller.
  • Flammable vapor ignition resistant technology is available in many units with a capacity of 30, 40, and 50 gallons.
  • Flame arrestor inhibits heat flames from being released during vapor ignition, which turns off the heating unit when the temperature is excessively high.
  • Thermal cut-off turns off the heating unit if the temperature is extremely high, leading to improper combustion in the chamber.

Problems With Reliance Water Heaters 

Their propane appliances are highly energy-efficient, but they are extremely expensive.

Many people cannot invest large sums of money upfront for a water heating system.

Therefore, you can opt for tankless devices because they are affordable compared to other types of units.

They will surely help you save a lot of money on electricity bills.

Another issue with their propane devices is that they are susceptible to a certain degree of rust or degrading.

It means that you may have to hire professional service to clean the machine so that your loved ones can continue to have clean water.


Reliance water heater reviews are top-notch items that will fulfill your requirements regardless of your house’s size or water heating concerns.
With numerous options to pick from and countless features incorporated, this firm is definitely worth your investment.  

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