A Step-by-Step Guide: How to Change Your Furnace Filter

Regular furnace maintenance is vital to maintaining the efficiency of your heating system, extending the life of your equipment, and preserving indoor air quality. One of the easiest and most important furnace maintenance tasks is changing the furnace filter. Although this may seem a small task, it can make a big difference to the comfort and energy costs of your house. This article is going to walk you through the process step by step if you’ve never changed a furnace filter before or just need a refresher. This will help ensure your furnace is operating efficiently and the air you breathe is cleaner.

Why Is It Important to Change Your Furnace Filter

It is very important to know the need of changing your furnace filter before you start the operation. The filter stops allergies, dust and other airborne particles from travelling around your home or getting into your HVAC system. Problems caused by a block or dirty filter:

For Furnace installation in vancouver, please check here.

Reduced Efficiency A dirty filter forces your furnace to work harder, resulting in higher energy use and utility bills.
Poor air quality : Dust, pet dander and other allergens can be spread throughout your home, affecting indoor air quality, especially for people with allergies or respiratory problems.
Increased wear and tear: Dirty filters make your furnace work harder, which puts more strain on it, increases the need for repairs, and shortens the furnace’s life span.
Risk of overheating: If a filter is very clogged, it can cause the furnace to overheat. This can make the system stop working or even cause a fire.

Now that you know why you should change the filter, let’s look at how to change it properly.

Materials and Tools Needed

Replacement filter A filter of the right size and type for your furnace is needed. You can find this information in the furnace manual or on the existing filter.
Screwdriver (optional) Some furnace models have panels secured with screws.
Vacuum cleaner or damp cloth. Useful for cleaning around the filter slot.

Why Choose BCRC for Furnace installation and Furnace Repair

Step-by-Step Instructions for Changing Your Furnace Filter

Turn Off Furnace

Safety is the first priority with any appliance. Turn off the furnace before you change the filter. Two ways to do this:

Using the thermostat: Turn the thermostat to the “Off” position.
Power Switch: If your furnace has a dedicated power switch or breaker, turn it off to cut power to the unit.

This step is important to keep the furnace from running while you’re changing the filter, which could suck in debris and potentially damage the system.

Find the Furnace Filter Compartment

Typically furnace filters are located at the intake air register (return air duct) or inside the furnace. You might find the filter:

In the furnace blower compartment behind a panel.
In the duct work where the return air is drawn into the furnace.

If you don’t know where to find the filter, your furnace manual should have a diagram showing where the filter is located.

Remove Access Panel (if applicable)

Some furnaces have access panels to the blower compartment or other internal components. If your model has one, you may need to unscrew it or you may just slide it off depending on the design.

When taking the panel out be careful not to damage any components.

Remove Old Filter

Once you can see the filter chamber, carefully slide the old filter out. Pay attention to the direction of airflow indicated by an arrow on the filter frame. This is important as you need to put the new filter in the right way up.

As you pull the old filter off, take note of its condition. If it was blocked with dust and debris it was obviously in need of replacement. Furnace filters usually need to be changed every one to three months, depending on usage and type.

Cleaning Around Filter Slot

It’s a good idea to clean the area around the filter slot before putting in the new filter. Dust and dirt can build up here over time and get sucked into your furnace when it’s running. Vacuum or wipe down with a damp cloth to remove any debris from the compartment.

New filter insert

Now that the area is nice and clean, it is time to install the new filter. Make sure the arrows on it for the air flow are pointing the same direction as on the old filter. If you are unsure, as a general rule, the airflow should come into the furnace through the return air duct.

Slide the new filter into place, ensuring a tight, but not too tight, fit. A well fitted filter will not allow air to escape and so everything that goes through the system will be filtered air.

Replacement access panel

If you removed any access panels, now is the time to replace them. If necessary, secure with screws, or simply slide back into place. Make sure to place it properly to avoid any openings that would allow air to enter or leave the system.

Reignite the Furnace

Once the new filter is in place and the access panel is reinstalled, you can turn the furnace back on. Turn the power switch on again, or reset the thermostat to its original setting.

Give the furnace a little time to work properly after it has started. Within a few minutes, warm air should begin to flow through the ducts and you should be able to hear the furnace working efficiently. If the system is not working properly, check that the access panel is tightly fastened and filter is properly installed.

BCRC Furnace Installation in Following Cities

How to Pick the Right Furnace Filter

Different Types of Furnace Filters There are different types of filters, and selecting the right filter for your system and home environment is key to optimal efficiency and air quality. Here are some of the most common choices:

Fibreglass Filters: These are the least expensive and most basic filters that last an average of 30 days. They are designed to protect the furnace, and do little to improve indoor air quality.
Pleated filters: These filters have a larger surface area for trapping particles, making them more effective in improving air quality. Usually, they last one to three months.
Electrostatic filters: These filters function by attracting and trapping particles with an electrostatic charge. They work very well at removing dust, allergens and other pollutants and can be either disposable or washable.
HEPA filters: HEPA stands for High-Efficiency Particulate Air. HEPA filters are designed to remove 99.97% of particles as small as 0.3 microns. They are usually found in homes where air quality is a big concern, such as homes with occupants who have allergies or asthma.
MERV Ratings: Filters are rated using the Minimum Efficiency Reporting Value (MERV) scale, which varies from 1-20. The higher the MERV rating, the better the filter is at trapping small particles. But, higher MERV ratings can also restrict airflow, so it’s important to check your furnace specifications to see the maximum MERV rating it can handle.

How frequently should you replace your furnace filter?

The speed of filter change depends on several factors including:

Type of filter: As we said above, some filters need to be changed every month, others can last up to three months or more.
Use If you find yourself using your furnace often, especially during the colder months, you will need to change the filter more often.
Air Quality: Homes with pets, smokers or high dust levels will require more frequent filter changes.
Allergies: If you have allergies or asthma in your home, changing the filter more often can improve the indoor air quality.

It’s a good idea to check your filter every month and replace it if it looks dirty. Even if the filter doesn’t appear clogged, it’s a good idea to change it out every 90 days during the heating season.

Other Furnace Maintenance Tips

Changing the filter is one of the most important furnace maintenance tasks, but there are a few other things you can do to make sure your furnace is running efficiently:

Plan for yearly inspections: A yearly inspection and tune-up by a professional HVAC technician can help identify any potential problems early and keep your furnace running efficiently.
Clean the vents and ducts Dust and debris tend to accumulate in the vents and ducts of your home over time, which can restrict airflow. Cleaning regularly helps improve air quality and system efficiency.
Clear the area around the furnace: Remove any obstructions, such as boxes, tools or other objects that could block airflow or create a fire hazard, around the furnace.

Conclusions

Changing your furnace filter is an easy, inexpensive way to prolong the life of your equipment, improve indoor air quality and keep your HVAC system operating properly. By following the step-by-step instructions in this guide, you can help ensure that your furnace continues to operate properly and keep you warm and comfortable during heating season. A habit of regularly checking and replacing the filter in your furnace will pay off, in terms of lower energy costs and fewer problems. Your furnace will thank you.

How to Change Your Furnace Filter