Maintenance, Resources + Tips

Furnace Filter Basics

Your furnace filter is an important part of your home’s heating system. Its main purpose is to remove particles and debris from the air entering your furnace in order to protect the mechanical components of your furnace, such as the motor.

Here are some basic tips to make sure that your filter is doing its job:

  1. Check & change your filter regularly – This is typically every 3 months, but more often if conditions require (ex. if you live in an area with a lot of dust, if you have pets who shed, or if you run your furnace fan continuously.
  2. Never try to clean a disposable filter – the materials break down over time and are not meant to be reused or cleaned. Looking for a permanent filter? Find out more about our exclusive Air Renew Electrostatic washable filters.
  3. If your filter doesn’t fit, it doesn’t filter – Air takes the path of least resistance so it is important that your filter fits in as closely as possible. It needs to reach right to the end of the filter track, and there should not be a visible gap on either the plenum or the furnace side. If your furnace needs a specialty size, you should get one, or, get your filter slot changed to fit a standard size. If there is a gap to the sides of the filter and there is not a snug fitting door, using a piece of duct tape down the slot to seal the gaps is a good idea.
  4. More “Merv” is not always better – A good Merv rating for residential use to balance particle trapping with air flow is between 5 and 8. You should consult with an HVAC professional before using a very high Merv filter, as your system may not be able to handle the air drop (decrease in airflow) caused by a very high efficiency filter. If you have a 2” or a 4” filter slot, using a filter with a higher Merv rating will be less of a concern, as the higher surface area of a thicker filter causes less resistance to air.
  5. Consider Running Your Furnace Fan Continuously – To encourage continuous air flow and filtration, run your fan continuously. Keep in mind that if you have not done this before, you will need to check your furnace filter more regularly, as running the fan will pull more air through the filter and cause it to become full quicker.

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Alberta Furnace Cleaning Reviews

A big shout out to Andrew and Aaron from Alberta Furnace Cleaning. My husband and I had recently renovated our home and were noticing a fine dust on everything that I couldn’t keep up with. Andrew and Aaron came in and cleaned the furnace, air conditioning unit and all the duct work. It was shocking to see what the found - construction debris, dog toys, tennis balls etc. They definitely have the equipment to thoroughly clean the mechanical and duct work. Both workers used care in removing vent covers, and cleaned all surfaces, properly replacing the grills when done. They were on time, efficient, polite and respectful of ourselves and our home. I could not be happier.

- Kerri Davis

Professional and Excellent Service! The team explained the entire process clearly and even showed me how dusty the furnace was. They performed their duties meticulously, ensuring everything was cleaned thoroughly. Highly recommend their services!

- SB

Great experience from start to finish. Easy to schedule, great communication and helpful information provided in advance. The techs were friendly, professional, and sweet. My house smells cleaner and it was money well spent. Will be booking again in a couple years for the next clean!

- Kelly Johnston

I recently had my furnace cleaned by this company and I couldn't be happier with the service. The technician was very knowledgeable and took the time to explain everything to me. The price was very reasonable compared to other companies in the area. I highly recommend them for any furnace cleaning needs.

- Rewa Arabi

Alberta Furnace Cleaning and its awesome crew, Jospeh, Salvador and Ali, did a wonderful job! They were very informative, so personable and efficient! We also appreciated their concern and attentiveness with our pets and our home! Highly recommended!

- Anna Dawson

We are very happy with the service provided cleaning the furnace and ducts. The communication regarding the appointment and the arrival time of the technicians was excellent. The technicians were very professional and polite. Highly recommend this company and will use them again in the future.

- Tracey Orme

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