How Often Should I Replace my AC Filters?

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How Often Should I Replace my AC Filters?

Posted On: July 17, 2019

How Often Should I Replace my AC Filters?

If you own an AC unit, a common question you may as is, “how often should I replace my air conditioner filters?” That’s an important question to keep in mind for all home or property owners. Generally, it depends on a variety of factors, but, it’s definitely more often then you might think. A few of the biggest factors are how many pets (if any) live in the home, the level of construction and air pollution in the area, the average indoor air quality and what type of filter is being used.


It’s broadly recommended that you change your AC filters every 30-60 days, but sometimes, an annual air filter change can suffice. It really depends on the factors mentioned above. In a single occupant’s home with no pets, a good average for changing your filters is 6-12 months on average. An average suburban home may need a filter change every 90 days, and if there’s a pet in the home, every 60 days. A good way to know what’s right for your home is to check your filter weekly. If it gets to the point where you are unable to see light dispersing through it, it’s time for a new filter.


But, let’s take a look at the factor you may have the most questions about – the type of filters. On the packaging, all filters have a MERV rating [Minimum Efficiency Reporting Value]. The system is simple – the higher the number, the higher the filter quality is. However, the highest number does not always work best for your home. A filter with a high MERV rating can actually slow down your air conditioning system unless it is working in a system with high-efficiency. When you buy a filter, make sure it has a balanced MERV rating, ideally in the 6-8 range.


At Twin Tech, we often include a MERV 11 air filter with our installations. If there is no construction or pets, these air filters can last up to 1 year. This filter is 5 inches thick and can allow substantially more airflow than the typical 1 inch thick 3M. If your home air conditioner can carry up to 2.5 tons or more, you should definitely consider having a MERV 11 air filter, in order to increase air flow and remove heat efficiently.


Changing your AC filter is important for maintaining the air quality in your home. It helps your system run at the top of its performance range, which can even mean lower energy bills! If you have any further questions or concerns, you can set up a free, no-obligation consultation with a Twin Tech Heating and Cooling expert, or you can give us a call at 1.844.894.6832.




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See What Our Customers Are Saying:

by GR from Oshawa on Twintech Heating and Cooling

Twintech replaced our aging furnace and air conditioner recently. I highly recommend this company. Their quote was competitive, they were on time and respectful of our home and extremely professional. From the salesman to the installers and the owner who followed up afterward to ensure we were satisfied, we are very pleased with the service. We are looking forward to working with this company for all of our HVAC needs for the years to come. Excellent workmanship and service!

by nathans in Scarborough on Twintech Heating and Cooling

We wanted to get our AC replaced as it was 22-years old and added to this our furnace was costing more and more to repair. So, we decided to get both the furnace and AC replaced.

After going through a few quotes and product reviews we decided to go with Twintech. The three-men crew arrived early in the morning, wasted no time and got to work right away. By 2:00 pm, they were all done. I’ve found their work to be top notch and they were completely professional. I had all my questions answered to my satisfaction both during the progress of their work and at end.

I have pleasure in recommending Twintech to anyone who is looking to get their furnace or Ac replaced

Nathan S.

by Private User on Twintech Heating and Cooling

Our air conditioner died On a Saturday and within hours Dave came out to take a look and discuss replacement/repair options.
The new air conditioner was installed on the Wednesday. The new unit was installed quickly. The installers were friendly and cleaned up afterwards.
We noticed a slight leak around the furnace that night and they came out the next day and fixed the issue. It has been working great and is quieter than our previous unit.
Very satisfied and would highly recommend TwinTech.

by Nancy in Toronto on Twintech Heating and Cooling

I contacted TwinTech to replace my 20-year old A/C. Dave, their service rep, promptly replied and was at my home within 2 hours. He was friendly and knowledgeable and didn't try to upgrade or oversell their A/C units but suggested the best fit for my small 1000 feet bungalow. Although this was during a heatwave and very busy, they were able to fit me in 2 days later. The TwinTech crew installed a 1.5 ton Ducane A/C unit that is now running smoothly while maintaining a constant cooling temperature. The crew were very courteous, professional and efficient and I will definitely recommend TwinTech to family and friends. I much appreciated your great service.
Nancy M., Oshawa

by Private User on Twintech Heating and Cooling

We had a great experience. The guys who installed our a/c did a nice job. Cleaned up.

by Private User on Twintech Heating and Cooling

excellent crew, fast and efficient! Would call them again when I need a new furnace.

by Private User on Twintech Heating and Cooling

Professional, courteous and efficient, don’t need to say more than that! Use them you will not regret it.

by Private User on Twintech Heating and Cooling

TwinTech was a pleasure to deal with from the estimate through installation. We replaced a 28 year old a/c unit with one recommended by TwinTech's sales representative Dave who took the time to go over the product with us and answer any questions. The warranty is for 10 years parts and labour and they will complete the registration for you. Installation was by Greg (owner) and Mitch and Spencer who were quick and efficient and left everything clean and tidy.

by Private User on Twintech Heating and Cooling

Very professional, from the sales consultation and inspection to the final installation. Met every expectations we had for the job. A local business with great client support. We highly recommend. Twintech is a blue chip! Thanks!

by Private User on Twintech Heating and Cooling

I left a live chat message on their website that my air conditioning was not working. Within 1hr a representative called me to discuss my options.
The next day he came to the house to review my needs and give me a price for a new system. Price quoted was less than I expected and the installation was completed the following day. I found their salesman and the installers very knowledgeable and easy to deal with. All my questions were answered. Everything was properly explained in regards to what unit was needed and why, along with instruction where needed for use.
The installers made sure everything was working properly before they left.

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