Which Should I Use in My Home? Electric vs Gas Water Heater

The short answer is: The choice between a gas or electric water heater depends on various factors, including the homeowner's preferences, local utility costs, and the existing infrastructure. Gas water heaters are often more energy-efficient and cost-effective for homes with access to natural gas, while electric water heaters can be a suitable choice in areas with lower gas availability or for smaller households with lower hot water demands.

As homeowners, we often come across the dilemma of choosing between electric and gas water heaters. While both types of water heaters essentially provide the same function, they work differently and have different efficiency levels. This leads us to the age-old question- which one is better for our homes? In this blog, we aim to answer this question by taking a closer look at the differences between these two water heaters. So, let's dive in!

Electric Water Heaters

Electric water heaters are an efficient and reliable way to ensure that hot water is always available in your home. These appliances work by using electricity to heat water, which is then stored in a tank until it is needed.

The heating process begins when cold water enters the tank through a supply line. The electric heating elements, which are located near the bottom of the tank, then activate. The heat generated by these elements raise the temperature of the water, causing it to expand and rise to the top of the tank. Simultaneously, cold water is pushed to the bottom, creating a constant flow and circulation of water in the tank.

As water heats up, it expands, and the pressure inside the tank increases. To avoid an explosion, a relief valve is installed to discharge any excess pressure when needed. This safety feature is essential to ensure that no harm is caused to your home or family.

Gas Water Heaters

They work by utilizing natural gas to heat the water, which is then distributed by your plumbing system to faucets, showers, and appliances throughout your home.

The gas water heater consists of a tank, burner assembly, thermostat, and safety devices. The tank is typically made of steel or glass-lined steel and is designed to hold and heat the water. The burner assembly is situated at the bottom of the tank and is responsible for igniting and heating the natural gas. The thermostat is used to control the temperature of the water, and safety devices are in place to ensure the heater operates safely.

When cold water enters the tank, it's directed to the bottom of the tank where it's heated up by the burner assembly. As the water heats up, it rises to the top of the tank where it's drawn off through the hot water outlet. The burner assembly will continue to operate until the thermostat senses that the desired temperature has been reached, at which point it will turn off the burner.

Electric vs Gas Water Heater Comparisons


The fundamental difference between electric water heaters and gas water heaters lies in their operation. Obviously, electric water heaters run on electricity, while gas water heaters run on natural gas or propane. Electric water heaters work by heating up an electric element, which in turn heats the water inside the tank. On the other hand, gas water heaters heat up the water through a burner that runs on natural gas or propane. The hotter the temperature level, the more energy is required for both types of appliances.


The next essential difference between electric water heaters and gas water heaters is their energy efficiency level. Generally, gas water heaters are more energy-efficient than electric ones because natural gas tends to cost less per unit of energy than electricity. However, it is essential to note that the efficiency of a water heater also depends on other factors such as the size of the tank, insulation thickness, and thermal resistance. Thus, selecting an energy-efficient water heater would significantly reduce the energy cost, regardless of whether it uses electricity or gas.


When it comes to costs, the initial installation cost for a gas water heater is usually more expensive than an electric water heater. This is due to the requirement of gas lines installation and additional components needed to make it function. However, as mentioned earlier, gas water heaters use cheaper energy, making them a cost-effective option in the long run. Conversely, electric water heaters have lower installation costs, but they consume more energy and are more expensive to operate.


Maintenance is inevitable in all appliances, and water heaters are no exception. In terms of maintenance, gas water heaters tend to require more frequent maintenance since they have more moving parts. This is due to the fact that gas combustion can create debris buildup within the tank and pipes, requiring occasional cleaning. On the contrary, electric water heaters usually require less maintenance since they have fewer parts to maintain.

Environmentally Friendly

Apart from efficiency and cost considerations, homeowners should also take note of the environmental impact of their water heaters. In terms of environmental impact, electric water heaters are generally more environmentally friendly, as they do not produce any toxic emissions. Conversely, gas heaters emit carbon dioxide and nitrous oxide.

Choosing the Right Size Gas or Electric Water Heater

Choosing the right size water heater for your home is crucial for maximizing energy efficiency and ensuring a consistent supply of hot water. Gas heaters and electric water heaters both come in various sizes, but it can be confusing to determine which one is right for your household.

Firstly, you need to determine the appropriate tank size for your needs. The tank size refers to the amount of hot water the water heater can store at any given time. The size of the tank you choose will depend on a number of factors, including the number of people in your household, your daily hot water usage, and the size of your home. A larger tank provides a greater supply of hot water but may not be necessary if you have a small household or use hot water sparingly.

To determine your household's hot water usage, consider how often you shower, do laundry, wash dishes, and perform other activities that require hot water. Take the maximum amount of hot water you could use for these activities at the same time and multiply it by 3. This will help you estimate the tank size that can supply your hot water needs. For instance, if you estimate a total hot water usage of 60 gallons at once, it is advisable to consider a heater with a tank size that can store at least 80 gallons of hot water.

It is also important to consider the recovery rate of the water heater. The recovery rate refers to how quickly the water heater can heat a full tank of water to the target temperature. A higher recovery rate means that you can use more hot water in a short period of time without having to wait for the tank to refill and reheat. A lower recovery rate will require you to wait longer between hot water usage.

Choosing the right size water heater for your home requires careful consideration of your hot water needs, household size, and recovery rate. Take the time to estimate your household's hot water usage and select an electric water heater or gas heater with a tank size and recovery rate that accommodates your needs. With the right water heater, you can have a consistent supply of hot water that's efficient, reliable, and cost-effective.

Installation for Gas and Electric Water Heaters

As we have seen, both electric water heaters and gas water heaters have their own set of advantages and disadvantages. Ultimately, the choice of which type of water heater is better for your home depends on your circumstances and requirements. Consider factors such as energy efficiency, installation costs, maintenance, and environmental impact when deciding which type of water heater installation is best for your needs.

Remember, it is always a good idea to consult a professional plumber to help you make an informed decision about the type of water heater that will work best for your household. Contact Mr. Plumber for a free water heater quote, and we would be more than happy to help you with your water heater needs!

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