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Got a Dirty Vent? Here’s How It Might Affect Your Home

As the weather gets colder, we rely on our furnaces a little more to keep our homes warm and comfortable. However, if our furnace isn’t running as efficiently as possible, it can cost us more money in the long run. One of the main culprits of an inefficient furnace is dirty return vents.

When dirt and dust build-up on the blades of your furnace’s return vent, it can restrict the airflow and make your furnace work harder to circulate air, leading to several problems.

What Happens When You Have a Dirty Return Vent?

When a return vent becomes dirty, it can cause several problems for your home’s HVAC system. The return vent is responsible for drawing air from your home back into the HVAC system so it can be reheated or cooled. If the return vent is dirty, it can restrict the airflow and make it difficult for your HVAC system to do its job. 

This can lead to several problems, including:

1. Your Home May Not Be Heated or Cooled Evenly

If the return vent in your home is dirty, it can restrict airflow and make it difficult for your HVAC system to do its job. This can lead to several problems, including uneven heating and cooling in your home. 

2. Your HVAC System May Have to Work Harder

Your HVAC system has to work harder to maintain the desired temperature when your return vent becomes dirty. This can lead to higher energy bills, as your system will be using more energy to try to reach the desired temperature.

3. Your HVAC System May Not Be Able to Keep Up with the Demand

The return vent is the large vent on the wall or ceiling that draws air back into your HVAC system. Over time, this vent can become clogged with dust, dirt, and other debris, which reduces its effectiveness and causes your HVAC system to work harder to maintain comfortable indoor temperatures.

4. Your HVAC System May Shorten Its Lifespan

When the vent becomes clogged with dust, pet hair, and other debris, your system has to work harder to draw in air, which can strain the system and cause it to break down prematurely. 

To avoid these problems, keeping your return vent clean is important. You can do this yourself or hire a professional to do it for you.

Furnace Cleaning Services Can Help

If you’re concerned about the air quality in your home, clogged return vents can also have an impact. The air circulates through your ductwork and can pick up pollutants like dust, pollen, and pet dander. If these pollutants build up in your vents, they can be released into the air when the furnace is running.

Fortunately, there’s an easy solution to this problem: furnace cleaning services. A professional furnace cleaning service will clean your return vents and the rest of your ductwork. This will remove any build-up of dust and debris, and it will also help to improve the air quality in your home.


Dirty return vents can have a significant impact on furnace energy efficiency. In some cases, a dirty return vent can cause a furnace to use up to 50% more energy than it would if the vent was clean. As a result, it’s important to ensure that your return vents are kept clean and debris-free. The best way to do this is to hire a professional furnace cleaning service.

Does your home need some furnace cleaning? Canada Unified Services is here to help. We are a family-owned local business providing the best cleaning services in Calgary. With our team of professionals, we’ll make sure your furnace will look its best. Get in touch with us today!