The average lifespan of top furnace models is usually between 15 and 25 years. The actual length of time that your furnace will last depends on a number of factors including how well it was installed, and how well it has been maintained. Read on to learn what other factors affect the lifespan of your furnace and what can be done to extend that lifespan. For the highest quality furnace installations and servicing in the Ottawa region, contact Draft Control Heating and Cooling today.

What Affects the Average Lifespan of Top Furnace Models

There are several different factors that will affect the average lifespan of top furnace models. These include:

Make and Model of Your Furnace:

A newer, more modern furnace will have a longer lifespan than an older unit. The quality of the make and model that you purchase will also predict how long your unit will last. A professional HVAC company can help you decide which type of unit will best meet the needs of your home.


The frequency and the quality of the maintenance on your furnace will also affect its lifespan. You should schedule regular maintenance of your system every fall with a licensed and reliable HVAC technician. This will keep your furnace running efficiently, will help you detect any possible minor issues before they become major ones, and will help you maintain your manufacturer’s warranty.


Keeping your filters clean will also increase the lifespan of your furnace. A dirty filter restricts the air flow and can cause overheating and eventually damage to your heat exchanger and the other components in your unit. During the winter, when your furnace is running every day, you should change your filters each month.

Average lifespan of top furnace models: A clean filter makes your furnace run more efficiently and last longer

Proper Ventilation:

Proper ventilation will ensure that your moisture levels are appropriate. If there is too much moisture, your heater components can rust or breakdown prematurely. Moisture can be especially damaging to your heat exchanger.

Proper Installation:

According to Energy Star, more than half of all HVAC systems are improperly installed and as a result, the system doesn’t perform as well as it should or last as long as it should. That is why it is very important to make sure that you choose an installer that is qualified and experienced to give you the quality installation that you should have.


The more time that your furnace is used, the faster it will wear down. If you live in a colder climate, your furnace will likely not last as long as one that is located in a warmer climate. Make sure that you regularly maintain your furnace to slow down the effect of this extra usage.


How Your Furnace Works

Average lifespan of top furnace models: Understanding how your furnace works will help you better understand how the various components affect its lifespan

To better understand what affects the lifespan of your furnace, it is helpful to understand the basic workings of your system and to learn about the various components that work together to heat your home. Each of these components has its own particular maintenance requirements and lifespan.


When you turn up your thermostat, the thermostat sends a signal to the furnace electronics system to produce more heat.


An electronic ignition or hot-surface ignition starts the combustion process. In the past, this was done by a pilot light.

Heat Exchanger:

During the combustion process, fuel is burned to warm up the heat exchanger. The exhaust fumes from the burning are released through the flue gas vent. The blower fan pushes air over the heat exchanger and then circulates into your house. This process will continue until your thermostat detects the temperature that you have selected. When that temperature is reached, your thermostat will shut your furnace off.

Draft Inducer Fan:

Modern furnaces have a component known as a draft inducer fan, which helps to exhaust the emissions and increase your furnace’s efficiency.

Dual Heat Exchanger:

If you have a condenser furnace, then it will use a dual heat exchanger that condenses water vapour and, as a result, even more heat is produced during the combustion process.

The heat exchanger is one of your furnace’s most important components. Watch to see how it works.

Modern Top Furnace Models Work Smarter

Today’s top furnace models are designed better and more efficiently than those made in the past. They are built to work smarter, not harder, than their predecessors. They are equipped with features such as two-stage gas valves, dual heat exchangers, and variable-speed blowers that enable them to produce precise heating throughout your home.

As a result, there is actually less stress placed on your furnace which enables them to last longer. In addition, the components in a modern furnace are made to be more durable so that they also last longer than furnaces of the past.

Draft Control: For Top Furnace Models Installed to Last

If you are looking to replace your furnace for a cost-saving, high-efficiency unit that will last, contact Draft Control. Draft Control HVAC is a highly trusted heating and air conditioning company servicing the East Ottawa region. Unlike other companies, we focus on our customers and their complete satisfaction, not on the brands that we sell. Whether you require installation, repair, or maintenance for your furnace, air conditioner, water heater, gas BBQ and fireplace, or boiler; Draft Control is there for you. Contact us today for all your heating and cooling needs.

“I’ve used Draft Control Heating and Cooling a few times now and it’s been a pleasure. Selim always assesses the work and gives me a call to let me know what was involved and the cost. I’ve replaced two furnaces already and have had many service calls done on multiple properties. I highly recommend to others! Thanks! “ – Kershan Bulsara , Ottawa ON

Financing Available!

Great news, Draft Control now offers financing through EcoHome Financial. If you know that you need to a new air conditioner and furnace and want to replace HVAC system, but you weren’t sure how you were going to do it financially, we can help. Contact Draft Control to learn more.


We Even Offer a Military Discount!

Draft Control is proud to offer a 10% discount to our military personnel. Contact us today to learn more.