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Gas Water Heaters

Gas water heaters are powered by either natural gas or propane and offer a more efficient way to heat water than electric models. Natural gas is the most commonly used fuel for residential hot water heating because it has a lower operating cost than electricity and is often the least expensive option. Also, gas water heaters tend to be less expensive to purchase upfront than electric models. Gas water heater tanks are available in a variety of sizes, ranging from 20 gallons to more than 95 gallons, so there is an appropriate size for virtually any home. The tanks range in efficiency from about 50% to more than 90%, so you can choose the most efficient model for your needs. [1]

Gas water heaters are typically very reliable and require little maintenance, although they may need an annual inspection to ensure that all components are functioning properly. They also do not require any special installation requirements and can be easily connected to existing plumbing lines. Another advantage of gas water heaters is that they require very little energy to operate, making them an efficient and cost-effective choice. Gas water heaters are relatively inexpensive compared to electric models, so you can save money on your energy bills. However, in some areas, natural gas may be more expensive than electricity, so it’s important to do your research before making a purchase.

Major Manufacturers of Gas Water Heaters


Rheem gas water heaters are without a doubt the market leader in the water heating sector, having been in operation for many years. They feature a large selection of natural gas or propane-powered tankless water heaters with capacities ranging from 0 GPM to 8.4 GPM. Their outstanding technology, affordability, and EcoNet management system—which enables you to monitor and manage your water heater from anywhere in the world—are the main reasons why most people choose them. Also, Rheem provides a one-year warranty on all other parts and a five-year warranty on heating components. [2]

A.O. Smith 

When compared to other companies, AO Smith Water Heaters stand out because of their extensive feature set. The building quality that AO Smith prides itself on is first and foremost. Every item is put through a thorough testing process to make sure it will perform better than the competition in every way and last for years to come. Energy efficiency is another feature that makes AO Smith water heaters unique.

Bradford White

Bradford White is one of the leading producers of gas water heaters, especially with their revolutionary Infiniti K series of Bradford White gas water heaters, which boast a variety of features and benefits that make going tankless the superior choice. Scale formation is significantly reduced by adopting the SteadiSet technology, which maintains the water’s temperature even in the absence of an internal buffer tank.

Types of Gas Water Heaters

Gas water heaters we install come in two types: tank-type and tankless, both of which have their own set of benefits and limitations as well.

Tanked Gas Water Heaters

The tank-type gas water heater is the most common type and consists of a large, insulated storage tank that holds several gallons of hot water. This type of system uses natural gas to heat up the water in the tank and then keeps it at a certain temperature until it’s needed. The advantage of this tank type is that it can provide a large amount of hot water at once, making it ideal for larger households.

Tankless Gas Water Heaters

Tankless gas water heaters are becoming increasingly popular due to their energy efficiency and space-saving features. With this type of system, the natural gas is used to heat up the water when you turn on the hot water tap, so there’s no need for a large storage tank. This eliminates the standby losses associated with tank-type systems and can save you up to 40% on your energy bills. Tankless systems usually provide an endless supply of hot water, but they may not be powerful enough to meet the needs of larger households or those with multiple hot water outlets.

An additional benefit of a tankless system is its ability to deliver an unlimited amount of hot water at once, making it ideal for larger households that require more than one hot water source simultaneously. With this type of system, you don’t have to worry about running out of hot water when more than one person is using it. Tankless systems also require less maintenance than tank-type systems, as they don’t require regular flushing or any other form of upkeep. In addition, many tankless models are equipped with advanced features such as temperature settings and timers that allow you to customize your hot water usage. Tankless systems can serve as a better alternative, but ultimately, the larger a family is, the better it is to go with a tanked version.

How Long Does A Gas Water Heaters Last?

Getting a new home appliance can be exciting at first, but since nothing lasts forever, home appliances included, eventually even a new gas water heater will need to be replaced. However, you can expect that a gas water heater will last anywhere from 10 to 15 years if it is regularly maintained. When deciding whether or not to repair or replace your water heater, the age of the unit should be a large factor in your decision, as older units tend to have more frequent malfunctions than newer models.

It’s important to note that the lifespan of your gas water heater can vary depending on a few things, such as water quality, usage, and maintenance. In order to get the most out of your gas water heater and have an accurate idea of when you should replace it, regular maintenance is key. This includes flushing the tank and checking for sediment buildup as well as other issues that may arise. Additionally, ensuring that all parts are functioning properly and replacing them as necessary will help prolong the life of your water heater.

As age increases, so does the probability of a breakdown. Replacing all parts when they start to malfunction can be costly and time-consuming; however, it can be worth it if you’re able to extend the life of your unit for a few more years. You should also turn off your gas water heater if it’s not in use for extended periods of time. This will help prevent any potential issues that may arise due to prolonged non-use.

In addition to regular maintenance and upkeep, you should inspect your gas water heater at least once a year. During this inspection, you should check for any signs of corrosion or leaks. You should also look for signs of sediment buildup, which can cause blockages within the tank and stop the flow of hot water. If any issues are discovered, it’s best to contact a professional repairman immediately, as this could be an indication of serious problems with your heater.

Common Problems with Gas Water Heaters

As with any piece of machinery, gas water heaters can suffer from a variety of problems. The common problems you might encounter with your gas water heater include:

Thermostat Malfunctions 

Thermostat failures frequently result in the water heater failing to heat the water correctly or failing to heat it at all.

Pilot Light Failure

If there is a problem with your pilot light, you may find that your gas supply does not ignite and will not produce hot water.


Over time, water heaters can start to leak from their connections and valves. This is caused by the rusting of the metal parts inside your heater, which will need to be repaired or replaced.


As previously mentioned, corrosion can occur on the metal components in your heater and cause leaks or a decrease in efficiency.


With regular use, sediment can build up in the bottom of your water heater and cause it to overheat or not heat properly. This will also reduce its efficiency.

Pressure Relief Valve

The pressure relief valve is an important part of your water heater that prevents it from building up too much pressure. If this valve gets stuck, it won’t be able to release any pressure and could cause your heater to overheat.

Anode Rod

An anode rod is intended to protect the inside of your water heater from corrosion. If it becomes damaged or corroded, it won’t be able to do its job, and your heater may begin to rust from the inside out.

Electric vs. Gas Water Heaters

Water heaters can be gas or electric-powered. Once you start looking into new heaters, you will need to decide between buying a gas or electric water heater. Although most homeowners would go toward the sort of water heater they previously had, you could be passing on a hot water system that is appropriate for your house. We’ve outlined the benefits and drawbacks of both electric and gas water heaters to assist you in making your decision on the sort of hot water system you want. [3]


A standard gas water heater might prove more difficult to use than an electric water heater when it comes to functionality. Since you will never need to worry about turning on the gas to start the system because it only uses electrical power, a lot of people might find it easier to operate an electric water heater in comparison to a gas water heater.


Gone are the days when electric heaters were more effective when compared to gas units in terms of water heating efficiency. The recent line of gas water heaters is now as efficient, if not more so than electric water heaters.


Gas models typically require more maintenance than electric ones, but they are also more energy-efficient. Electric water heaters can take longer to heat up the water and may not be as cost-effective in the long run. It’s important to evaluate your needs and budget before deciding which type of heater is best for you.


There is a slight difference in the price of electric and gas water heaters as electric water heaters cost slightly more than gas water heaters..

Overall, gas water heaters offer several advantages over electric models, making them a great choice for those looking for an efficient and cost-effective option. They are more energy-efficient, require less maintenance, and are pocket-friendly. However, be sure to do your research before investing in one to make sure that you’re getting the best deal possible. With the right gas water heater, you’ll be able to enjoy hot water whenever you need it without putting a strain on your budget.

Frequently Asked Questions

1. How much is a gas water heater for a house?

The cost of a gas water heater that will meet the needs of a house should be about $900 to $1500, but this estimate will be influenced majorly by the size of the family, its needs, and its location.

2. Is it now cheaper to heat water with gas or electricity?

Gas water heaters cost less to operate than electric water heaters, at least by a difference of 33% or even more.

3. Can a gas water heater last 25 years?

It is extremely rare for used water heaters to last 25 years while maintaining their efficiency. Tank water heaters typically last 8 to 12 years on average, but tankless water heaters can last up to 20 years.

4. Are new gas water heaters more efficient than old ones?

Due to their age and the fact that requirements were lower back then, older versions of gas water heaters are significantly less energy efficient, which might result in higher monthly energy expenses than those associated with a modern gas water heater.

5. What is the most common problem with a gas hot water heater?

The most frequent type of water heater problem with a gas water heater that you’ll experience is probably a leak. Any water heater will ultimately start to leak because water will eventually corrode your tank and cause microscopic cracks or fractures. This is just how nature works. This does not necessarily mean that the leak is coming from your tank, though.

6. How do you know when you need a new gas water heater?

Common signs that you need a new gas water heater include insufficient hot water, rusted water, gurgling sounds, and leaks.

7. What are the signs your hot water heater is going out?

Some of the signs that your hot water heater is going out include rust deposits inside the water and a metallic stench emanating from the hot water. These indicate the presence of rusty pipes or rust inside the water heater and are one of the major indicators that your hot water heater has exhausted its lifespan.

8. Should I replace my 20-year-old water heater?

A tankless water heater model once it reaches 20 years of use needs to be replaced, while a tank version at that point has long exhausted its service life and needs to be replaced immediately.

9. How often should the gas water heater be checked?

Your gas water heater should be checked every two months for possible problems and repairs. This will in turn help it sustain its efficiency over the years.

10. Can a gas water heater catch fire?

Yes, a gas water heater can catch fire if used improperly.


  1. Best Water Heater Buying Guide – Consumer Reports. 
  2. ENERGY STAR Certified Water Heaters.
  3. Electric vs. Gas Water Heaters – Forbes.

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