How Long Do Furnaces Normally Last?

How Long Do Furnaces Normally Last?


As a homeowner, you want to know that you’re getting the most out of your furnace. It is because the unit is an expensive investment, and you don’t want to replace it more often than necessary. But you may wonder how long furnaces last with or without furnace maintenance Greencastle, PA? Well, like most things in your home, your furnace can last a long time with proper care.

Let’s take a look at how long furnaces last on average and what you can do to keep yours running efficiently for as long as possible.

The Average Lifespan of a Furnace

As a homeowner, you want to do everything you can to keep your home in tip-top shape. That includes taking care of your furnace and ensuring it’s running efficiently. But how long does a furnace actually last? We did some research and here’s what we found.

With proper maintenance, your furnace should last between 15 and 20 years. However, if you don’t keep up with regular furnace maintenance Greencastle, PA, your furnace could start to experience problems after just ten years.

However, several factors can affect a furnace’s lifespan, such as:

The quality of the furnace

Higher-quality furnaces will last longer than lower-quality units. Nowadays, several high-efficiency furnaces on the market can last 20 years or more, and their quality is only improving.

The type of fuel used

Furnaces that use natural gas tend to last longer than oil or propane. This is because natural gas is cleaner burning fuel, so it doesn’t put as much strain on the furnace. On the other hand, propane and oil furnaces require more maintenance and repairs, which can shorten their lifespan if not done right.


How often a unit gets furnace maintenance Greencastle, PA affects how long it will last. If you never clean or replace the filter, your furnace will have to work harder to circulate air, which can shorten its lifespan. Similarly, if you don’t have the unit serviced regularly, small problems can turn into big ones that are much more expensive to repair.

The environment

The furnace’s location also plays a role in how long it will last. If the unit is dusty or humid, it will require frequent filter changes and cleanings. Conversely, if the unit is in a clean and dry climate, it won’t have to work as hard and will last longer.


Furnaces used more frequently will have a shorter lifespan than those used less often. That is because they will require more maintenance and repairs over time. So, if you only use your furnace occasionally, it could last 20 years or more. But if you use it every day, it might only last ten years.

So, there you have it! The average lifespan of a furnace is 15-20 years, although several factors can affect its longevity. If you take good care of your furnace and have regular furnace maintenance Greencastle, PA, you can expect it to last for many years to come.

What Can You Do to Prolong Your Unit’s Lifespan?

The good news is that there are some easy things that you can do to keep your furnace running smoothly for as long as possible. Here are a few of them:

Schedule Annual Maintenance Checks

One of the best ways to prolong the life of your furnace is to schedule a maintenance check with the experts each year. During a maintenance check, a technician will clean your furnace and check for potential problems. Catching a problem early can save you a lot of money in the long run and keep your furnace running smoothly for years to come.

Remember that expensive repairs are often caused by small issues, which are neglected until they turn into big ones. So, please don’t wait until your furnace breaks down to get it serviced! When you notice something doesn’t seem right with your unit, give your technician a call. Even if your unit doesn’t seem to act up, it’s still best to have a professional check it out every year or so.

Change Your Filters Regularly

Depending on your filter type, you may need to change it monthly or every few months. Having clean filters will help your furnace run more efficiently and prevent costly repairs down the road. This is a simple furnace maintenance Greencastle, PA that you can do yourself. Be sure to know what type of filter you need, and keep a few extras on hand so that you can change them out as needed.

Don’t Ignore Warning Signs

If you notice that your furnace is making strange noises or doesn’t seem to be heating your home as well as it used to, don’t ignore it! These could be warning signs that there is a problem with your unit. The sooner you have a technician take a look at it, the better. Ignoring the problem will only make it worse and more expensive to fix.

Your furnace is an important part of your home, and you want it to last for long as possible. With proper maintenance, your furnace should last between 15 and 20 years. Scheduling an annual furnace maintenance Greencastle, PA and changing your filters regularly are two easy ways to prolong your furnace’s life.

Risks of Not Maintaining Your Heating System

Not maintaining your furnace can put your family at risk in a number of ways. Here are just a few of the dangers that come with neglecting your furnace:

Carbon Monoxide Poisoning

If you don’t get regular furnace maintenance Greencastle, PA, it can release carbon monoxide into your home. This is a colorless, odorless gas that can be deadly if inhaled. Symptoms of carbon monoxide poisoning include headaches, dizziness, nausea, and fatigue. If you or your family members start to experience any of these symptoms, it’s important to get out of the house immediately and call for help.

House Fires

This is most likely to happen if you don’t change your furnace’s filter regularly. When the filter is full of dirt and debris, it can cause your furnace to overheat and potentially start a fire. This happens if the heat from the furnace ignites the filter, which then starts to burn anything else around it. That’s why regular furnace maintenance Greencastle, PA is so important!

Health Problems

If you have asthma or another respiratory condition, not maintaining your furnace can make your symptoms worse. Dust, pollen, and other airborne particles can build up in your furnace over time and circulate through your home when you turn it on. This can trigger asthma attacks and other respiratory problems.

Shorten the Lifespan of Your Furnace

As mentioned earlier, one of the benefits of regular furnace maintenance Greencastle, PA is that it can prolong the lifespan of your furnace. Without proper care, your furnace will have to work harder to heat your home, which will cause it to wear out more quickly. In addition, neglecting your furnace can void your manufacturer’s warranty.

Frequent Repairs

If you don’t maintain your furnace, it will likely break down and need repairs. These repairs can be expensive, especially if you have to replace major components like the heat exchanger. In addition, if your furnace breaks down in the middle of winter, you and your family could be left in the cold until a technician can come out to fix it.

Higher Energy Bills

When your furnace is well-maintained, it runs more efficiently and doesn’t have to work as hard to heat your home. This can save you money on your energy bills every month. A furnace maintenance Greencastle, PA can save your pocket in the long run.


If your furnace isn’t working properly, your home won’t be as comfortable as it should be. During the winter, this can mean cold drafts and uneven heating. In the summer, your air conditioner may not work as well if your furnace isn’t functioning properly. Either way, you and your family won’t be as comfortable as you deserve to be.

So, if you want to keep your family safe and save money in the long run, getting regular furnace maintenance Greencastle, PA is important. Be sure to contact a qualified technician at least once a year to inspect and service your furnace. And don’t forget to change your furnace’s filter regularly!

Call Johnston’s Heating & Cooling for Furnace Maintenance in Greencastle, PA

Determining the average lifespan of your furnace can be hard, but one thing is for sure: you can extend its service life with regular furnace maintenance Greencastle, PA.

At Johnston’s Heating & Cooling, we offer comprehensive furnace maintenance services that can keep your furnace running smoothly for years to come. Our qualified technicians will clean and inspect your furnace and make any necessary repairs or adjustments. We’ll also change your furnace’s filter and check for carbon monoxide leaks.

To learn more about our furnace maintenance services or schedule an appointment with our reputable team, contact Johnston’s Heating & Cooling at (717) 504-2613. We look forward to serving you.

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