Tankless Water Heaters at Lowes: The Ultimate Guide

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Hey there! Looking to upgrade your water heating system? Well, look no further because we’ve got just the thing for you. Have you heard about tankless water heaters? They’re an incredible innovation that provides hot water on demand, without the need for a bulky storage tank.

Now, let me tell you why tankless water heaters are such a game-changer. First off, they’re super energy-efficient, which means they can help you save big on your utility bills. No more wasting energy by constantly heating and reheating water in a traditional storage tank.

But that’s not all! Tankless water heaters also have a longer lifespan compared to their traditional counterparts. With proper maintenance, they can last up to 20 years or more! Plus, they come in different sizes and types to suit various household needs.

So if you’re tired of running out of hot water or dealing with high energy bills, it’s time to consider making the switch to a tankless water heater. Trust me, once you experience the convenience and efficiency of having hot water on demand, you’ll never want to go back.

Benefits of Tankless Water Heaters vs Traditional Water Heaters

Tankless water heaters, also known as on-demand water heaters, offer a range of benefits compared to traditional water heaters. Let’s explore these advantages in more detail:

Endless Hot Water Supply

One major advantage of tankless water heaters is that they provide an endless supply of hot water. Unlike traditional water heaters that rely on a storage tank, tankless models heat the water directly as it passes through the unit. This means you’ll never have to worry about running out of hot water, even during long showers or when multiple appliances are being used simultaneously.

Space-Saving Design

Tankless water heaters take up significantly less space compared to their traditional counterparts. Without the need for a bulky storage tank, these units can be mounted on walls or installed in compact spaces such as closets or under sinks. This makes them an ideal choice for homeowners with limited space or those looking to maximize their usable square footage.

Energy Efficiency and Lower Utility Bills

Tankless water heaters are renowned for their energy efficiency. By heating the water only when needed, rather than constantly maintaining a large volume of hot water like traditional models do, they consume less energy overall. This translates into lower utility bills and reduced environmental impact. In fact, studies have shown that switching from a traditional to a tankless water heater can result in energy savings of up to 30%.

Longer Lifespan

Another significant advantage of tankless water heaters is their longer lifespan compared to traditional units. While traditional models typically last around 10-15 years, tankless models can often exceed 20 years with proper maintenance and care. This extended lifespan not only saves you money in the long run but also reduces waste by minimizing the need for frequent replacements.

Factors to Consider when Buying a Tankless Water Heater

Determine the Flow Rate Required

To ensure your tankless water heater meets the hot water demands of your household, it’s crucial to determine the flow rate required. This is determined by factors such as the number of bathrooms, appliances, and fixtures that will be using hot water simultaneously. By assessing your household’s needs, you can choose a tankless water heater with an appropriate flow rate.

Consider the Suitable Fuel Type

When selecting a tankless water heater, it’s important to consider the fuel type that best suits your home setup. There are two main options: electric or gas-powered tankless water heaters. Electric models are generally more energy-efficient and easier to install since they don’t require venting. On the other hand, gas-powered units tend to have higher flow rates and can handle larger hot water demands.

Look for High Energy Efficiency Ratings

Energy efficiency is a crucial factor to consider when purchasing any appliance, including tankless water heaters. Look for models that are Energy Star certified, as this indicates their high level of energy efficiency. These certified units not only help reduce your carbon footprint but also save you money on utility bills in the long run.

Consider Installation Requirements

Before making a purchase, it’s essential to consider the installation requirements of a tankless water heater and whether they align with your existing plumbing system. Some models may require additional electrical or gas connections or modifications to accommodate their installation. It’s advisable to consult with a professional plumber or contractor who can assess your home’s specific needs and provide guidance on compatibility.

Considering these factors will help you make an informed decision when buying a tankless water heater from Lowe’s or any other retailer. By determining the flow rate required based on your household’s hot water demands, you can ensure that you select a unit capable of meeting those needs effectively. Considering the suitable fuel type will help you choose between electric and gas-powered models, depending on your preferences and setup.

Furthermore, prioritizing high energy efficiency ratings by opting for Energy Star certified tankless water heaters will not only benefit the environment but also save you money in the long run. Finally, considering the installation requirements and compatibility with your existing plumbing system is crucial to ensure a smooth and hassle-free installation process.

Remember, when purchasing a tankless water heater, it’s important to consider not only the initial cost but also the long-term benefits and savings it can provide. Taking these factors into account will help you find the perfect tankless water heater that meets your household’s hot water needs while being energy-efficient and cost-effective.


Comparison of Electric and Gas Tankless Water Heaters

Electric tankless water heaters and gas tankless water heaters are two popular options for homeowners looking to upgrade their hot water systems. Each type has its own advantages and considerations, so it’s essential to understand the key differences between them before making a decision.

Electric Tankless Water Heaters: Easy Installation and Low Maintenance

One significant advantage of electric tankless water heaters is their ease of installation. Unlike gas models, which require proper ventilation for combustion, electric units can be installed almost anywhere in your home without the need for venting. This makes them a more flexible option.

Another benefit of electric tankless water heaters is that they generally require less maintenance compared to their gas counterparts. With no combustion process involved, there are no pilot lights or burners to clean or maintain regularly. This can save you time and effort in the long run.


  • Easy installation with flexible placement options.
  • Minimal maintenance required.
  • No need for ventilation or exhaust systems.


  • Lower flow rates compared to gas models.
  • May not be suitable for larger households with high hot water demands.

Gas Tankless Water Heaters: High Flow Rates for Larger Households

If you have a larger household with high hot water demands, a gas tankless water heater might be the better choice. Gas models typically have higher flow rates than electric ones, allowing multiple appliances or showers to run simultaneously without experiencing a drop in hot water supply.

While gas tankless water heaters may have higher upfront costs due to the need for professional installation and ventilation requirements, they can offer cost savings in terms of lower operating costs over time. Gas prices tend to be lower than electricity rates in many areas, making gas models more economical in the long term.


  • Higher flow rates suitable for larger households.
  • Potential cost savings on operating expenses.
  • Greater flexibility in terms of hot water supply.


  • Requires proper ventilation for combustion.
  • Higher upfront costs for installation and venting.

When deciding between electric and gas tankless water heaters, it’s important to consider factors such as your household size, hot water demands, and budget. If you have a smaller household with lower hot water needs, an electric model may be sufficient and more cost-effective upfront. On the other hand, if you have a larger household or require higher flow rates, a gas tankless water heater can provide the performance you need.

Remember to consult with a professional plumber or HVAC technician who can assess your specific requirements and recommend the best option for your home. They can also help ensure that the installation is done correctly and safely.

By understanding the differences between electric and gas tankless water heaters, you can make an informed decision that meets your hot water needs while considering factors like installation ease, maintenance requirements, flow rates, and long-term operating costs.

Exploring Different Types of Tankless Water Heaters at Lowes.com

If you’re in the market for a tankless water heater, Lowes.com is an excellent place to start your search. They offer a wide variety of options to suit every need and budget. Let’s take a closer look at the different types of tankless water heaters available on Lowes.com.

Electric Tankless Water Heaters

Electric tankless water heaters are popular for their compact size and energy efficiency. Here are some key features and benefits:

  • Easy Installation: Electric tankless water heaters are relatively easy to install, making them a convenient choice for homeowners.
  • Energy Savings: These units only heat water when it’s needed, resulting in lower energy consumption and reduced utility bills.
  • Space-Saving Design: Electric tankless water heaters take up less space compared to traditional storage tanks, making them ideal for small homes or apartments.
  • Endless Hot Water: With electric tankless water heaters, you’ll never run out of hot water as they provide a continuous supply on-demand.

However, there are also some considerations when it comes to electric tankless water heaters:

  • Limited Flow Rate: Electric models may have limited flow rates compared to gas-powered ones, so it’s important to choose the right size for your household’s needs.
  • Higher Initial Cost: While electric tankless water heaters can save money in the long run, they typically have higher upfront costs than conventional storage tanks.

Gas Tankless Water Heaters

Gas-powered tankless water heaters are another popular option available at Lowes.com. Here’s what you need to know about them:

  • High Flow Rates: Gas tankless water heaters can provide a higher flow rate compared to electric models, making them suitable for larger households with high hot water demands.
  • Lower Operating Costs: Natural gas is often more affordable than electricity, which can result in lower operating costs over time.
  • Quick Heating: Gas-powered units heat water quickly, ensuring you have hot water whenever you need it.

However, there are a few considerations to keep in mind with gas tankless water heaters:

  • Installation Requirements: These units require professional installation and proper venting due to the combustion process involved.
  • Space Considerations: Gas tankless water heaters may require more space for installation compared to electric models.
  • Higher Initial Cost: Similar to electric tankless water heaters, gas models tend to have higher upfront costs than traditional storage tanks.

Hybrid Tankless Water Heaters

Hybrid or dual-fuel tankless water heaters provide the best of both worlds by combining electric and gas technologies. Here’s what makes them unique:

  • Versatility: Hybrid tankless water heaters offer flexibility by allowing homeowners to choose between electric and gas as their energy source.
  • Energy Efficiency: By utilizing both electric and gas power, these units can achieve high energy efficiency ratings.
  • Enhanced Performance: The combination of electric and gas technologies ensures a reliable supply of hot water even during periods of high demand.

While hybrid tankless water heaters offer many advantages, it’s important to consider the following:

  • Complex Installation: Due to their dual-fuel nature, hybrid models may require more complex installation procedures compared to single-source options.
  • Higher Initial Cost

Tips for Properly Sizing a Tankless Water Heater


Determining the appropriate size of a tankless water heater is crucial to ensure that it can meet your household’s hot water needs. Here are some tips to help you properly size a tankless water heater:

Calculate Your Hot Water Demand

The first step in sizing a tankless water heater is to calculate your household’s hot water demand. This involves estimating the maximum amount of hot water you will need at any given time. Consider factors such as the number of bathrooms, appliances (like dishwashers and washing machines), and the number of people in your household.

Consider Flow Rate and Temperature Rise

Flow rate refers to the amount of hot water needed per minute, while temperature rise refers to how much the incoming cold water needs to be heated. These two factors play a significant role in determining the size of your tankless water heater. To calculate flow rate, consider the fixtures or appliances that will be using hot water simultaneously. Determine their flow rates and add them together.

Determine Required Gallons Per Minute (GPM)

Once you have calculated your household’s hot water demand and considered flow rate and temperature rise, you can determine the required gallons per minute (GPM) for your tankless water heater. This will help you choose a unit with an adequate GPM rating to meet your needs.

Consult Manufacturer Recommendations

It’s always wise to consult the manufacturer’s recommendations when choosing a tankless water heater size. Manufacturers often provide guidelines based on different factors like climate, altitude, and desired performance levels. These recommendations can serve as valuable starting points in selecting an appropriately sized unit.

Seek Professional Advice

If you’re unsure about properly sizing a tankless water heater or want expert guidance tailored specifically to your home’s needs, don’t hesitate to seek professional advice from plumbers or HVAC specialists. They have experience in evaluating various factors that affect sizing and can provide personalized recommendations.

Pros and Cons of Proper Sizing

Properly sizing a tankless water heater has several advantages:

  • Energy Efficiency: A properly sized unit ensures that you’re not wasting energy by heating more water than necessary.
  • Continuous Hot Water: With the right size, you’ll have a consistent supply of hot water, even during peak usage times.
  • Longevity: An appropriately sized tankless water heater will experience less strain, potentially extending its lifespan.

On the other hand, there are a few drawbacks to consider as well:

  • Cost: Larger units with higher GPM ratings tend to be more expensive than smaller ones.
  • Space Requirements: Depending on the size of your tankless water heater, you may need adequate space for installation.

Remember to carefully weigh these pros and cons when choosing the size of your tankless water heater. It’s essential to strike a balance between meeting your hot water needs and staying within budget.

Maintenance Tips for Prolonging the Lifespan of Your Tankless Water Heater

Regular maintenance is crucial for ensuring the longevity and optimal performance of your tankless water heater. By following these simple tips, you can keep your unit running smoothly and avoid costly repairs or replacements down the line.

Regularly flush and descale your tankless water heater to remove mineral buildup.

Over time, minerals such as calcium and magnesium can accumulate inside your tankless water heater, leading to reduced efficiency and potential damage. Flushing and descaling the unit helps remove these deposits, keeping it in top shape. Refer to your manufacturer’s guidelines on how often this should be done, as it may vary depending on the hardness of your water.

  • Turn off the power supply to the unit.
  • Close off any valves connected to the unit.
  • Connect a hose to both the hot and cold water valves.
  • Use a bucket or drain to collect any water that comes out during flushing.
  • Open both valves and let them run for several minutes until clear water flows through.
  • Close off the valves, disconnect the hoses, and turn on the power supply.

Check and clean the inlet filter to ensure proper water flow.

The inlet filter prevents debris from entering your tankless water heater. Over time, it can become clogged with dirt, sediment, or other particles. Regularly inspecting and cleaning this filter will help maintain adequate water flow and prevent potential issues.

  • Locate the inlet filter (usually located near where you connect your cold-water supply).
  • Turn off the power supply to the unit.
  • Remove any screws or clips securing the filter cover.
  • Take out the filter carefully.
  • Rinse it under running water until clean or soak it in vinegar solution if necessary.
  • Reinstall the filter securely back into its place.

Inspect the unit’s components for any signs of damage or wear.

Periodically checking the various components of your tankless water heater is essential for catching any potential issues early on. Look for signs of corrosion, leaks, loose connections, or worn-out parts. If you notice anything out of the ordinary, it’s best to consult a professional for further evaluation and repair.

Follow the manufacturer’s guidelines for maintenance and schedule professional servicing if needed.

Each tankless water heater model may have specific maintenance requirements outlined by the manufacturer. It’s crucial to read and follow these guidelines to ensure proper care and avoid voiding any warranties. Consider scheduling professional servicing at least once a year to have a thorough inspection and maintenance performed by qualified technicians.

By implementing these maintenance tips, you can extend the lifespan of your tankless water heater and enjoy reliable hot water for years to come. Remember that regular upkeep is key to preventing potential problems and maximizing the efficiency of your unit.

Making an Informed Decision on Tankless Water Heaters from Lowes

Now that you have a better understanding of tankless water heaters and the factors to consider when purchasing one, you can confidently make an informed decision. By choosing a tankless water heater from Lowes, you are not only investing in a reliable and energy-efficient appliance but also gaining access to a wide range of options tailored to your specific needs. Whether you opt for an electric or gas-powered unit, Lowes has got you covered. So why wait? Upgrade your home’s hot water system today and enjoy the benefits of endless hot water while saving money on your energy bills.


Frequently Asked Questions

What is the lifespan of a tankless water heater?

Tankless water heaters typically have a longer lifespan than traditional water heaters, lasting up to 20 years or more with proper maintenance. Regular maintenance, such as descaling and flushing the system annually, can help prolong its lifespan.

Can I install a tankless water heater myself?

While it is possible for experienced DIYers to install a tankless water heater themselves, it is recommended to hire a professional plumber or electrician for installation. They have the expertise to ensure proper sizing, venting, and electrical connections for safe and efficient operation.

Are tankless water heaters more expensive than traditional ones?

Initially, tankless water heaters may have a higher upfront cost compared to traditional ones. However, they can save you money in the long run due to their energy efficiency and longer lifespan. Some utility companies offer rebates or incentives for installing energy-efficient appliances like tankless water heaters.

How do I determine the right size of tankless water heater for my home?

The size of your tankless water heater depends on several factors such as the number of bathrooms in your home and peak hot water demand. It’s best to consult with a professional plumber who can assess your specific needs and recommend the appropriate size for your household.

Can a tankless water heater supply enough hot water for multiple appliances simultaneously?

Yes, tankless water heaters are designed to provide hot water on demand, so they can supply multiple appliances simultaneously. However, the flow rate and capacity of the unit should be considered to ensure it meets your household’s hot water demands.

Tankless Water Heaters at Lowes: The Ultimate Guide

Discover the best tankless water heaters at Lowes for energy-efficient and endless hot water. Shop now and find the perfect model for your home. #tanklesswaterheater #Lowes