How Long Does a Water Heater Last?
A Question We Hear from Both New and Long-Time Customers
At Aaron Services, one of the most common questions we get is, “How long does a water heater last”. We tell them, it depends. The type of heater, how often it’s used, and how well it’s maintained all play a role in determining its lifespan.
We often follow up with questions of our own: What type of water heater do you have? How often is it used? When was the last time it was serviced? These details help us give a better estimate. The way you use and maintain your water heater matters a lot. In this article, we’ll explain what can affect how long should a water heater last and offer some tips to help you keep it running longer.
Water Heater Lifespan
So, how long can you expect your hot water heater to last? The type of water heater you have plays a big role. A traditional tank water heater typically serves a home for about 8 to 12 years. With a tankless water heater, you might see it last 15 to 20 years, sometimes even longer with proper care.
These numbers offer a general idea, but they aren’t set in stone. Some homeowners see their water heaters lasting well beyond these averages, while others face the need for replacement sooner. Different types of heaters, like gas versus electric, can also have varying lifespans.
The typical lifespan gives you a timeline to consider when planning for a replacement. In the next section, we’ll explore what can extend a water heater’s life—or what might lead to an earlier replacement.
Factors That Influence How Long Water Heaters Last
Several factors play a significant role in determining how long a water heater lasts. By understanding these factors, you can take steps to extend the life of your unit, whether you have a traditional tank or a tankless model.
Impact of Water Quality on Water Heater Longevity
One of the biggest factors affecting how long a water heater lasts is the quality of the water running through it. Minerals sink to the bottom of your water heater, build up and harden over time. in This buildup reduces the efficiency of the heater and can cause it to wear out faster.
Hard water, which contains high levels of calcium and magnesium, is especially problematic for water heaters. If you have hard water, your water heater might not reach the typical lifespan of 8 to 12 years for a tank or 15 to 20 years for a tankless model.
A whole home water filtration system can protect your water heater from sediment build up. If you have hard water, a water softener can help reduce the impact of hard water on your home. It’s also important to flush the tank regularly to remove any sediment that does accumulate, which brings us to our next point—maintenance.
How Frequency of Use Affects Your Water Heater’s Lifespan
The frequency of use is a major factor in determining the longevity of your water heater. In a busy household with multiple people, especially with children who love long, hot showers, the heater is likely working overtime.
In these situations, the water heater might wear out sooner than the average 8 to 12 years for a tank model or 15 to 20 years for a tankless system. For example, a family with teenagers who take extended showers or a household where multiple loads of laundry are done daily will put more strain on the water heater. This increased demand can lead to quicker wear and tear.
Even in a high-demand household, regular maintenance plays a crucial role in extending the life of the water heater. Keeping up with these tasks can help balance out the heavy use and prevent the unit from failing prematurely. We’ll dive into specific maintenance tasks next, which are essential to helping your water heater reach its maximum lifespan.
Importance of Regular Maintenance for Water Heater Durability
Routine maintenance is essential to ensure your heater continues to function efficiently for years. Simple tasks like flushing the tank to remove sediment buildup, checking the anode rod, and scheduling annual inspections with a professional can make a big difference.”
For a gas water heater, it’s especially important to check the burner and venting system. Proper maintenance can help a gas water heater last the expected 8 to 12 years, and possibly longer. Tankless water heaters also need regular flushing to prevent scale buildup, which is essential to reach or exceed their 15 to 20-year lifespan.
The anode rod, in particular, plays a vital role in preventing rust inside the tank. Replacing it when it’s worn out can prevent premature failure of the appliance. Without regular maintenance, you might find yourself replacing your water heater sooner than expected.
Tank vs. Tankless Water Heaters: How Long Do They Last?
When deciding between a traditional tank model and a tankless water heater, understanding the differences in lifespan and performance can help you make an informed choice. Both types have their pros and cons, and these can significantly impact how long they last in your home.
Comparing the Lifespan of Tank vs. Tankless Water Heaters
Tank water heaters are the more traditional choice and typically last between 8 to 12 years. This lifespan can vary based on factors like water quality, frequency of use, and regular maintenance. Many people ask, “How long does a gas water heater last?” For gas models, the lifespan usually falls within this same range, although it can be slightly shorter or longer depending on usage and care.
On the other hand, tankless water heaters, which have become increasingly popular, can last much longer. The expected lifespan of a tankless water heater is generally between 15 to 20 years, and with proper care, some can last even longer. This is one of the key advantages of going tankless—longevity. When people ask, “How long does a tankless water heater last?” the answer is often significantly longer than that of a traditional tank model.
Pros and Cons of Different Water Heater Types
Tank Water Heaters:
- Pros: One of the main advantages of a tank water heater is its lower upfront cost. Installation is usually simpler and less expensive compared to tankless models. Tank water heaters are also better suited for households with high simultaneous hot water demands, like running multiple showers and appliances at once.
- Cons: The primary drawback is their shorter lifespan. Over time, sediment buildup can reduce efficiency and lead to premature failure, especially in areas with hard water. Additionally, tank models are less energy-efficient since they continuously heat water to maintain the desired temperature, even when not in use.
Tankless Water Heaters:
- Pros: The standout benefit of tankless water heaters is their longevity. How long does a tankless water heater last? As mentioned earlier, they can serve you well for 15 to 20 years. They’re also more energy-efficient, as they only heat water on demand, reducing energy waste. This makes them a great option for those looking to lower their utility bills and reduce their environmental impact.
- Cons: The initial cost of a tankless is higher, and the installation can be more complex, often requiring upgrades to your home’s electrical or gas systems. Additionally, while tankless models can provide endless hot water, they may struggle to meet high simultaneous demands, depending on the unit’s size and capacity.
Making the Right Choice
Choosing between a tank and tankless water heater depends on your household’s needs and priorities. If you’re looking for a lower initial cost and have high simultaneous hot water demands, a tank water heater might be the right choice. However, if longevity, energy efficiency, and long-term savings are more important, investing in a tankless heating system could be the better option.
Regardless of which type you choose, you still need to remember to keep up with the maintenance to have your system reach its full lifespan. In the following sections, we’ll dive deeper into the signs that your water heater might need replacing and how you can extend its life.
Signs Your Water Heater is Reaching the End of Its Lifespan
Over time, all water heaters will start to show signs of wear and tear. Recognizing these signs early can help you avoid sudden breakdowns and the inconvenience of being without hot water. So, how long do water heaters usually last, and what should you watch for as they near the end of their lifespan?
Inconsistent Hot Water: A Sign of an Aging Water Heater
One of the first signs that your unit may be on its way out is inconsistent hot water. If you notice that the water temperature fluctuates during showers or that it takes longer than usual to get hot water, this could indicate a problem. With time the unit may struggle to keep up with the demand, especially if it’s 10 years or older.
Strange Noises from Your Water Heater: What They Mean
Another common sign is strange noises coming from the water heater. If you hear popping, banging, or rumbling sounds, it’s often due to sediment buildup at the bottom of the tank. Over time, this sediment hardens and can cause the heating unit to become less efficient, ultimately leading to its demise. These noises are a clear signal that your water heater might be reaching the end of its life, especially if it’s within the typical 8 to 12-year range for tank models or 15 to 20 years for tankless systems.
Visible Rust and Leaks: When to Consider Replacing Your Water Heater
Visible rust on the tank or in the water coming from your taps is another red flag. Rust is a sign that the metal inside the water heater is corroding, which can lead to leaks. Once rust starts to form, it’s only a matter of time before the tank fails. If you notice rust or small leaks around the base of the unit, it’s time to consider a replacement. No matter how long water heaters should last, corrosion is a clear indicator that the end is near.
When Should You Consider Replacing Your Water Heater?
Deciding when to replace your water heating unit depends on several factors. If your unit is within the average lifespan—8 to 12 years for a tank model or 15 to 20 years for a tankless one—and you’re noticing any of these signs, it’s probably time to start shopping for a new one. While repairs can sometimes extend the life of a water heater, they may not be cost-effective if the unit is already nearing the end of its expected lifespan.
During our recent Water Heater Giveaway contest, we saw many entries from customers with units well past their prime. Some of the most surprising findings included water heaters over 20 years old that were still in use, though not without significant issues like rust, leaks, and inefficiency. While some water heaters might outlast their expected lifespan, this often comes at the cost of performance and reliability. We found a lot of interesting old water heaters in the process, and you can read more about those discoveries.
If you’re experiencing any of these warning signs, it may be time to consider a new water heating unit. Investing in a new unit can save you money on energy bills and give you peace of mind, knowing that you won’t be left without hot water when you need it most.
Tips to Extend the Life of Your Water Heater
Extending the life of your water heating system saves you money and guarantees that you have a reliable supply of hot water for years to come. By taking a few proactive steps, you can significantly increase how long does water heater lasts. Below, we’ll explore some practical tips to help you get the most out of your unit, whether it’s a tank or tankless model.
Regular Maintenance: The Key to How Long Your Water Heater Lasts
Regular maintenance is essential for keeping your water heater in good condition. One of the most important tasks is flushing the tank to remove sediment buildup. Sediment can accumulate over time, especially if you have hard water, and it reduces the efficiency of your heating system. Flushing the tank once a year can help prevent this buildup, ensuring that your water heater lasts as long as possible.
In addition to flushing the tank, checking and replacing the anode rod is crucial. The anode rod helps prevent rust from forming inside the tank. If it’s worn out, the tank can start to corrode, leading to leaks and ultimately, a shorter lifespan. Replacing the anode rod every few years can make a big difference in how long do water heaters last.
Installing a Water Softener: Protecting Your System from Hard Minerals
Hard water is a common issue that can shorten the lifespan of your water heater. The minerals in hard water, like calcium and magnesium, cause sediment to build up inside the tank or the heat exchanger in tankless models. This buildup not only reduces efficiency but also puts extra strain on your water heater, leading to premature failure.
Installing a water softener can help mitigate this problem by removing the excess minerals before they reach your water heater. By softening the water, you reduce the amount of sediment that can accumulate, which in turn helps extend how long your water heater lasts.
Quick Tip: Whole House Water Filtration Systems
While water softeners tackle mineral buildup, a whole house water filtration system goes a step further by removing additional contaminants like chlorine, sediment, and other impurities. Installing such a system ensures comprehensive protection for your water heater and improves the overall water quality throughout your home.
Insulating the Tank: Improving Efficiency and Lifespan
If you have an older or consumer grade water heater, you may consider insulating your water heater. Today’s professional grade water heaters are internally insulated, which is why they don’t feel hot to the touch despite their hot contents. If your water heater tank is losing heat, insulating it can be a low cost DIY effort to improve its efficiency.
For tankless water heaters, insulating the pipes can also provide similar benefits. By reducing the heat loss from the pipes, the system doesn’t have to work as hard to deliver hot water. Your hot water appliance will last longer.
Professional Servicing: Ensuring Optimal Performance
While there are many things you can do yourself to maintain your water heater, professional servicing is invaluable. A certified technician can perform more thorough inspections and maintenance tasks that might be difficult for a homeowner to do on their own. For instance, checking the gas lines, venting, and thermostat settings can ensure that everything is operating safely and efficiently.
Scheduling annual check-ups with a professional can catch small issues before they become major problems. Just like a car, a water heater should be inspected by a professional regularly.
Frequently Asked Questions (FAQs)
Most tank water heaters last between 8 to 12 years, depending on usage, water quality, and maintenance. Tankless models often last 15 to 20 years or more.
With regular maintenance, a tank water heater should typically last around 10 years, and a tankless alternative could last up to 20 years.
Gas water heaters generally have a lifespan of 8 to 12 years. Proper maintenance, such as regular flushing and checking the anode rod, can help ensure it lasts as long as possible.
Signs include inconsistent hot water, strange noises, visible rust, and leaks. If your residential heater is within the typical lifespan and shows these symptoms, it might be time to consider a replacement.
Regular maintenance is key. This includes flushing the tank, checking and replacing the anode rod, installing a water softener, and insulating the tank or pipes. Professional servicing can also help catch issues early and ensure your system runs efficiently.
As we’ve discussed, the duration of your heater’s life varies depending on the type, usage, water quality, and how well it’s maintained.
At Aaron Services, we’re here to help you with all your plumbing needs. Whether it’s performing routine maintenance, addressing issues, or guiding you through the process of selecting and installing a new unit, our team of professionals is ready to assist. If you’re unsure whether to repair or replace your water heater, we can help you decide what’s best.
Thinking about replacing your water heater? Call Aaron Services today at 770-273-0877!