If you’re looking to upgrade your water heating system, going tankless can save space, water and energy. But should you choose gas or electric? This comprehensive guide will examine the pros and cons of each so you can decide which tankless water heater is the best fit for your home.
If you’re short on time, here’s the quick answer: gas tankless water heaters tend to be more energy-efficient and can supply hot water more continuously than electric models. However, electric tankless heaters are often cheaper upfront and easier to maintain.
It comes down to your needs, fuel type availability and budget.
How Do Gas and Electric Tankless Water Heaters Work?
Tankless water heaters, also known as on-demand water heaters, are becoming increasingly popular for their energy efficiency and endless hot water supply. Unlike traditional water heaters that store and heat a large amount of water in a tank, tankless water heaters heat water only when it is needed, providing hot water on demand.
Gas Tankless Water Heaters
Gas tankless water heaters work by using a burner fueled by natural gas or propane to heat the water as it flows through the unit. When a hot water tap is turned on, cold water enters the heater and flows through a heat exchanger.
The burner ignites, heating the heat exchanger and transferring the heat to the water. The heated water then flows out of the unit and to the desired faucet or fixture.
Gas tankless water heaters are known for their high flow rates, allowing multiple hot water sources to be used simultaneously without a significant drop in water pressure. They are also generally more efficient than electric tankless water heaters, as gas is a more affordable and energy-dense fuel source.
However, they require proper ventilation and access to a gas supply line.
Electric Tankless Water Heaters
Electric tankless water heaters, on the other hand, use electrical elements to heat the water. When a hot water tap is turned on, cold water flows into the unit and passes over the electrical heating elements.
These elements heat the water as it flows through, and the heated water is then sent to the desired faucet or fixture.
Electric tankless water heaters are typically smaller and easier to install than gas models because they do not require a venting system. However, they have lower flow rates compared to gas tankless water heaters and may struggle to provide hot water simultaneously to multiple fixtures.
Additionally, electricity rates can vary depending on location, so it’s important to consider the cost of electricity when choosing an electric tankless water heater.
In terms of energy efficiency, both gas and electric tankless water heaters can provide significant savings compared to traditional tank-style water heaters. According to the U.S. Department of Energy, tankless water heaters can be up to 34% more energy efficient for homes that use 41 gallons or less of hot water daily.
Ultimately, the choice between a gas and electric tankless water heater depends on factors such as available fuel sources, desired flow rates, and installation requirements. Consulting with a professional plumber or researching reputable sources such as Energy.gov can help you make an informed decision based on your specific needs and circumstances.
Factors to Consider When Choosing Gas vs Electric
Energy Efficiency
When deciding between a gas and electric tankless water heater, energy efficiency is an important factor to consider. Gas tankless water heaters are generally more energy efficient than electric ones. They heat water on demand, which means they only consume energy when hot water is needed.
On the other hand, electric tankless water heaters often require more energy to heat the water, resulting in higher energy costs over time.
Hot Water Output
The hot water output is another consideration when choosing between gas and electric tankless water heaters. Gas tankless water heaters typically have a higher hot water output compared to their electric counterparts.
This means that you can enjoy a higher flow rate and a greater amount of hot water at one time. Electric tankless water heaters may have limitations on the amount of hot water they can produce simultaneously.
Upfront Costs
When it comes to upfront costs, electric tankless water heaters are generally more affordable than gas ones. Electric units are usually less expensive to purchase and install. However, it’s important to note that the overall cost of installation may vary depending on factors such as the complexity of the installation and the availability of gas lines.
Operating Costs
While electric tankless water heaters have lower upfront costs, they tend to have higher operating costs compared to gas tankless water heaters. Gas is often a cheaper fuel source compared to electricity, resulting in lower monthly utility bills for those with gas tankless water heaters.
However, it’s important to consider the cost of natural gas in your area and compare it to electricity rates.
Installation Requirements
Installation requirements can also play a role in your decision-making process. Gas tankless water heaters require access to a gas line, which may not be available in all homes. Electric tankless water heaters, on the other hand, only require access to electricity.
It’s important to assess your home’s infrastructure and consult with a professional to determine which type of heater is suitable for your specific situation.
Maintenance
Both gas and electric tankless water heaters require regular maintenance to ensure optimal performance and longevity. Gas tankless water heaters typically require more maintenance due to the combustion process involved.
Electric tankless water heaters, on the other hand, may require less maintenance as they do not have combustion components. Regular maintenance includes descaling, checking for leaks, and inspecting electrical connections.
Environmental Impact
When it comes to environmental impact, electric tankless water heaters are often considered more environmentally friendly compared to gas ones. Electric tankless water heaters do not produce any greenhouse gas emissions during operation.
Gas tankless water heaters, however, produce carbon dioxide and other emissions as a byproduct of the combustion process. If reducing your carbon footprint is a priority, an electric tankless water heater may be the better choice.
Pros and Cons of Gas vs Electric Tankless Water Heaters
Pros and Cons of Gas Tankless Water Heaters
Gas tankless water heaters are a popular choice for many homeowners due to their efficiency and cost-effectiveness. Here are some pros and cons to consider:
- Pros: Gas tankless water heaters provide hot water on-demand, resulting in lower energy consumption compared to traditional water heaters. They can heat water faster and can supply a continuous flow of hot water, making them ideal for households with high hot water demand.
Gas tankless water heaters also tend to have a longer lifespan compared to electric models.
- Cons: One of the main drawbacks of gas tankless water heaters is the installation cost. They require proper ventilation and often need a larger gas line, which can increase installation expenses. Gas tankless water heaters also require regular maintenance, such as checking for gas leaks and cleaning the burners, which adds to the overall maintenance costs.
Pros and Cons of Electric Tankless Water Heaters
Electric tankless water heaters are an alternative option for those who prefer not to use gas. Here are some pros and cons to consider:
- Pros: Electric tankless water heaters are generally more affordable and easier to install compared to gas models. They don’t require ventilation or a gas line, which can save on installation costs. Electric tankless water heaters also have a compact size, making them suitable for small spaces.
Additionally, they have a longer lifespan compared to traditional electric water heaters.
- Cons: One of the main drawbacks of electric tankless water heaters is their limited hot water output. They may struggle to provide hot water simultaneously to multiple fixtures in a high-demand household.
Electric tankless water heaters also tend to have a slower heating time compared to gas models, resulting in a slight delay in hot water delivery.
When deciding between gas and electric tankless water heaters, it’s essential to consider your specific needs and circumstances. Factors such as installation costs, hot water demand, and energy efficiency should all be taken into account.
Furthermore, consulting with a professional plumber or conducting thorough research can help you make an informed decision.
Who is Each Type of Tankless Water Heater Best For?
Gas Tankless Water Heaters
Gas tankless water heaters are an excellent option for homeowners who have access to natural gas or propane. They are known for their high heating capacity and fast water heating times. If you have a large household with multiple bathrooms or frequently use hot water for activities like laundry and dishwashing, a gas tankless water heater may be the best choice for you.
Gas tankless water heaters are also a great option for areas with colder climates, as they can heat the water to higher temperatures more efficiently than electric tankless water heaters. This makes them ideal for households that require hot water for tasks such as running a hot tub or filling a large bathtub.
Additionally, gas tankless water heaters are often preferred by those who prioritize energy efficiency and cost savings. While they may have a higher upfront cost compared to electric models, they can save homeowners money in the long run due to their lower operating costs.
Gas tankless water heaters also tend to have a longer lifespan than electric models, making them a durable and reliable choice.
Looking for more information? Check out Energy.gov for detailed guides on gas tankless water heaters.
Electric Tankless Water Heaters
Electric tankless water heaters are an ideal choice for homeowners who do not have access to natural gas or propane. They are compact, easy to install, and require less maintenance compared to gas tankless water heaters.
If you live in an area where electricity is more readily available and affordable, an electric tankless water heater may be the best option for you.
Electric tankless water heaters are also a suitable choice for smaller households or individuals with lower hot water demands. They are efficient at providing a continuous supply of hot water for activities like showering, handwashing, and small household tasks.
Another advantage of electric tankless water heaters is their lower upfront cost compared to gas models. They are generally more affordable and easier to install, making them a budget-friendly option for homeowners.
Looking for more information? Check out Consumer Reports for comprehensive reviews and recommendations on electric tankless water heaters.
Recommendations for Choosing Gas or Electric
When it comes to choosing between a gas or electric tankless water heater, there are a few recommendations to consider. Each type has its own advantages and disadvantages, so it’s important to evaluate your specific needs and circumstances before making a decision.
Consider Your Energy Source
The first thing to consider is your energy source. If you already have a natural gas line running to your home, a gas tankless water heater may be the most cost-effective option. Natural gas tends to be less expensive than electricity, so you could potentially save money on your energy bills in the long run.
On the other hand, if you don’t have a gas line or prefer not to use natural gas, an electric tankless water heater may be the better choice.
Assess Your Water Usage
Another factor to consider is your water usage. Gas tankless water heaters typically have a higher flow rate compared to electric models, which means they can provide hot water to multiple fixtures simultaneously.
If you have a large household with high hot water demand, a gas tankless water heater may be the best option to ensure you always have enough hot water. However, if you have a smaller household with lower hot water demands, an electric tankless water heater may be sufficient.
Consider Installation Costs
Installation costs should also be taken into account. Gas tankless water heaters usually require professional installation and may require additional venting for exhaust gases. This can result in higher upfront costs compared to electric tankless water heaters, which can be installed by homeowners themselves in some cases.
It’s important to consider not only the initial cost but also the long-term savings and potential energy rebates that may be available.
Assess Long-Term Maintenance
Lastly, consider the long-term maintenance requirements. Gas tankless water heaters typically require more regular maintenance, such as annual inspections and cleaning of the burner. Electric tankless water heaters, on the other hand, generally require less maintenance.
It’s important to factor in the potential costs and time associated with maintenance when making your decision.
Ultimately, the choice between a gas or electric tankless water heater depends on your specific needs and circumstances. Consider your energy source, water usage, installation costs, and long-term maintenance requirements to make an informed decision.
Gas tankless water heaters may be more suitable for larger households with high hot water demands and existing natural gas connections, while electric tankless water heaters may be more convenient and cost-effective for smaller households or those without access to natural gas.
Conclusion
When choosing between gas and electric tankless water heaters, consider your energy needs, fuel availability, upfront costs, efficiency goals and maintenance preferences. Gas models tend to be more efficient and higher output, while electric units are often cheaper upfront with easier repairs.
By weighing the pros and cons of each, you can decide which type of tankless heater is the best fit for your home.
