The Truth About Furnace Filters: How Often Should You Really Change Them?

The importance of furnace filters is often overlooked when it comes to keeping a comfortable and healthy home. But these small, often overlooked parts are crucial for both the efficiency of your heating system and the quality of your indoor air. At BCRC Heating and Cooling, we believe in educating you, especially when it comes to your home’s HVAC system. In this guide, we’ll uncover the truth about furnace filters, answer the most pressing questions from homeowners and seniors, and provide expert advice to help you get the most out of your heating system.

What are Furnace Filters and Why Are They Important?

Furnace filters are vital parts of your home’s heating, ventilation and air conditioning (HVAC) system. These often overlooked devices are designed to trap airborne contaminants such as dust, pollen, pet dander, mould spores, and even microscopic bacteria. Furnace filters are located in key places within your furnace system to serve two purposes: they protect the inner workings of your HVAC unit and help to promote cleaner indoor air for you and your family. Check out our expert furnace installation Vancouver from here.

Let’s unpack that a bit. Furnace filters are primarily used to protect the inside parts of your HVAC system. The filter is exposed to the air that is being circulated through the furnace to be warmed and distributed throughout your home. Without such a barrier, contaminants would be deposited on important components like the blower fan and heat exchanger. This build-up can cause your system to overheat, work inefficiently, or even break down prematurely. Simply put, clean furnace filters help your furnace last longer and perform better, reducing the chance of costly repairs or replacements.

The second important function is to improve the indoor air quality. This is especially beneficial to those with allergies, asthma or other respiratory problems. Properly maintained furnace filters trap many of the airborne particles that can cause or exacerbate these conditions. Clean air is not a luxury, it’s a health requirement. High-efficiency furnace filters are a smart investment in your family’s health, especially since seniors, children and pets are most susceptible to poor air quality.

Plus, the quality of air inside your home can directly affect your energy levels, your sleep quality and your overall health. Think of your furnace filter as the gatekeeper of your home’s air. If that gate is dirty or clogged, it closes — and the effects are felt throughout your whole house.

How Often Should You Actually Change Your Furnace Filter?

One of the most common questions we get from homeowners is “How often should I change my furnace filter?”. The general rule of thumb is to check your filter monthly and change it every 90 days, but there are several variables that can affect this timeline. Depending on the type of filter you use, your home’s specifics, and how much you run your furnace.

Types of Furnace Filters

Not all furnace filters are the same. This is how the various types compare in terms of longevity and performance:

• Fibreglass Filters: This is the most basic and cheapest option. These filters consist of thin layers of fibreglass and are good at trapping large particles such as dust and lint, but are not as good at trapping smaller allergens. Fibreglass filters fill up quickly, so change them out every 30 days.

• Pleated Filters: Pleated furnace filters are made out of polyester or cotton folds, which provide a larger surface area and greater filtration efficiency. They capture small particles and last up to 90 days depending on your household conditions.

• HEPA Filters: High Efficiency Particulate Air (HEPA) filters are among the best for cleaning indoor air. HEPA filters can trap 99.97% of particles in the air and are great for people with allergies or weak immune systems. However due to airflow restrictions they may require professional installation and typically last up to 6 months.