Your furnace is one of the most important appliances in your home, especially during the harsh winters in Canada. In places like Edmonton, where temperatures often dip well below zero, having a reliable furnace is crucial for keeping your home warm and comfortable. To maintain your furnace’s efficiency and ensure it lasts as long as possible, selecting the best furnace filters is essential.

Not only do these filters keep your home safe from pollutants, but they also help your furnace run smoothly. Regularly changing or cleaning your filters can prevent potential problems and keep the air in your home clean and fresh.

What is the Purpose of a Furnace Filter?

Many people think that the primary purpose of a furnace filter is to clean the air in their homes. While it’s true that filters help improve indoor air quality by removing impurities, their main job is actually to protect the furnace itself. The filter traps debris that comes through the return duct, which includes dust, pet hair, and other allergens.

If the filter becomes dirty or clogged, it can lead to decreased airflow and cause the furnace to work harder than necessary. This not only can result in more polluted air circulating in your home but also can lead to costly repairs down the line.

Air Filter Terms to Know

When shopping for furnace filters, you might come across various terms like furnace filters, air filters, AC filters, or HVAC filters. These terms may be used interchangeably, but they all refer to the same basic product. In colder climates like Canada, “furnace filter” is the more common term. Here are some key terms to understand:

• MERV (Minimum Efficiency Reporting Value): This rating system ranges from 1 to 16. A higher MERV rating means a filter can trap smaller particles. For most homes, a MERV rating of 8 to 12 is sufficient.
• MPR (Microparticle Performance Rating): This measures how well a filter captures smaller particles that MERV doesn’t cover, typically in the range of 0.3 to 1 micron.
• FPR (Filter Performance Rating): This is another rating system that uses a color-coded scale from 4 to 10. The higher the number, the better the filter is at removing particles.
• HEPA (High-Efficiency Particulate Air): HEPA filters are the most effective, trapping up to 99.97% of airborne allergens and pollutants. They are ideal for homes with allergy sufferers but tend to be more expensive.

Most Common Types of Furnace Filters in Canada

When selecting the best furnace air filters, it’s important to understand the different types available. Each type has its own advantages and disadvantages, making it crucial to choose one that fits your needs.

Flat Filters

Flat filters are the standard type most people are familiar with. They are generally made of spun fiberglass and come in 1 to 2 inches thicknesses. While these filters are the cheapest and most common option, they are also among the least effective at trapping smaller particles. They primarily catch larger debris, making them less ideal for households with allergies or respiratory issues.

Pleated Filters

Pleated filters are made from fabric that is pleated, much like an accordion. Typically made from cotton or polyester, they are more effective than flat filters at removing smaller particles from the air. Although they are a bit more expensive, the added efficiency makes them a worthwhile investment for better air quality.

Electrostatic Filters

Electrostatic filters have an electrostatic charge that helps attract both larger and smaller particles, making them more efficient than standard flat filters. Many of these filters are washable and reusable, which can save money in the long run. Their ability to trap more debris makes them a popular choice among homeowners.

Activated Carbon Filters

These filters excel at removing odors, smoke, and harmful gasses from the air. Activated carbon filters work through a process called adsorption, where particles stick to the carbon within the filter. While they are effective at improving air quality by removing unpleasant smells, they are not as efficient at trapping allergens or bacteria.

Fiberglass Filters

Fiberglass filters are among the most common types and consist of spun fiberglass reinforced by a metal grate. They are disposable and affordable but only capture about 25% of smaller particles. While they may catch larger debris, they are not the best choice for households needing superior air filtration.

Polyester Filters

Polyester filters are made from high-quality materials and can remove up to 95% of harmful particles larger than 5 microns. Although they are more expensive than fiberglass filters, their improved filtration capabilities make them a better option for families concerned about air quality.

Ultraviolet (UV) Filters

UV filters use short-wave UV light to disinfect the air, making them effective at eliminating bacteria, viruses, and other harmful microorganisms. However, they are not particularly effective at removing dust and other pollutants, so they are often used in conjunction with other filter types.

HEPA Filters

HEPA filters are among the most effective on the market, capable of removing up to 99.97% of pollutants and allergens, including dust, pollen, and pet dander. While they are more expensive and can restrict airflow in some systems, they are invaluable for those with allergies or respiratory issues.

Reusable and Washable Filters

Both flat and pleated filters can be purchased as reusable or washable options. Even though they require a higher initial investment, these filters save money in the long run since you won’t need to buy replacements frequently.

Media Filters

Media filters are larger and more efficient than standard filters, capturing a higher volume of particles. They can last longer and often come in a variety of MERV ratings, making them suitable for different home environments.

Factors to Consider When Choosing the Best Furnace Filter

Choosing the right furnace filter involves several considerations. Here are some key factors to keep in mind:

MERV Rating

A MERV rating between 8 and 12 is usually sufficient for most residential homes. Filters with higher MERV ratings can restrict airflow, potentially causing issues with your furnace. These high-rated filters are generally used in commercial settings like hospitals.

Filter Type

The type of filter you choose can significantly affect your home’s air quality and your furnace’s efficiency. Consider what your specific needs are—whether it’s removing allergens, odors, or just general dust.

Filter Size

The size of your filter matters, too! Filters come in various thicknesses, heights, and lengths. Typically, thickness ranges from 1 to 5 inches, while overall dimensions can vary significantly. Always check your furnace’s specifications before purchasing.

Indoor Air Quality

Your home’s air quality can be influenced by many factors, such as pets, smoking, or even cooking. When selecting a filter, consider the specific needs of your household to ensure you choose one that can effectively tackle these issues.

Climate and Outdoor Air Quality

If you live in an area with poor outdoor air quality, you should consider filters with higher efficiency ratings to help capture harmful pollutants. A larger surface area can also improve a filter’s ability to clean the air.

Family Health

If anyone in your home suffers from allergies or asthma, it’s important to choose an air filter that can effectively capture allergens. High-rated filters, like HEPA, can provide additional benefits, though they may require new equipment.

Budget

Cost is always a factor. Disposable filters typically need replacement every 30 to 90 days, while washable filters can last for up to 10 years. While reusable filters have a higher initial cost, they can save money over time by avoiding frequent purchases.

How Often Should You Change Your Air Filter?

Changing your air filter regularly is essential for maintaining good air quality and preventing your furnace from working too hard. Generally, filters should be changed every 1 to 3 months, but this can vary depending on factors like the type of filter, the number of pets in your home, and your local air quality.

Call TaskPro for Help!

Choosing the right furnace air filter can be confusing, especially with so many options available. Always consult your HVAC system’s operating manual to understand its requirements. If you have questions or need assistance, don’t hesitate to contact the experts at TaskPro. We offer heating services, repairs, and furnace maintenance for your heating needs if you’re in Vancouver, Burnaby, Coquitlam, or anywhere in British Columbia.

FAQs

What is the most common size furnace filter in Canada?

The most common sizes for furnace filters in Canada are typically 20 x 20 x 1 and 16 x 25 x 1.

What filters should be used for a furnace?

For most residential HVAC systems, filters with a MERV rating between 8 and 13 work well. Higher-rated filters should only be used with systems designed to handle them.

Is an HVAC filter the same as a furnace filter?

Yes, HVAC filters and furnace filters are essentially the same thing. Both serve the purpose of cleaning the air and protecting your furnace, although the terminology may vary depending on the context in which they are used.