Furnace filters play an incredible role in keeping indoor air fresh, breathable, and comfortable. Many of you are unaware that the air inside your air can be much more polluted than the outside air. Therefore, the only way to ensure clean air is to invest in a high-quality air filter. Wide varieties of air filters are available on the market. Therefore, choosing the right option is a challenging endeavor. If you want to understand some crucial recommendations for purchasing an AC filter, keep reading!

Essential Buying Tips to Buy the Right AC Filters

1. Select the Perfect-Fit AC Filter

The most crucial factor to consider while buying an AC filter is determining which fits your HVAC unit best. You can know the filter’s measurements from the manufacturer’s guide or the owner’s manual. All you need to do to select the correct size air filter is to measure your current filter to know which one is compatible.

Remove the existing AC filter from the heating unit and measure its length, width, and height. A standard AC filter is generally 20 inches long. However, you must buy the right-fit AC filter to enjoy safe and pure indoor air quality.

2. Know the Filter’s MERV Rating

The minimum Efficiency Reporting Value of the MERV rating of the air filters indicates the efficiency of the filters. Moreover, this rating assesses how effectively an air filter can trap dust, dirt, pollen, molds, etc., and purify indoor air. The higher the rating, the better it provides good indoor air quality.

3. Understand the Materials Used to Make the Filter

Different AC filters contain different materials. If you want an inexpensive air filter, fiberglass should be your go-to option, but it is less proficient at trapping airborne contaminants. In addition, you will be required to replace the fiberglass filters monthly.

On the contrary, pleated AC filters are more durable and effective at collecting dirt and dust. However, these filters cost significantly higher than fiberglass ones. Though they are expensive, you should buy high-quality filters that may last for a year.

4. Know the Time to Change the Filter

If you fail to replace the existing AC filter at the right time, the filter will not operate well. Never be late to replace your clogged AC filter when it shows signs like incorrect heating or cooling condition, high energy bills, visible airborne contaminants inside the home, etc.

Importance of Maintaining AC Filters

We recommend you follow all the above tips to ensure good HVAC maintenance. If you still experience irregularities in the heating and cooling system or poor-quality indoor air issues despite following the tips, there must be severe HVAC issues aside from the air filter. Scheduling proper AC filter maintenance is essential to solve these issues.

You can talk to a professional to examine the HVAC system’s moving parts and identify the problems’ source. Even if you still haven’t experienced any issues with your AC filters, you must ensure routine tune-ups. If you can’t locate and solve the problems on your own, hire an expert to fix all the minor flaws in your air conditioner.


Following the tips described in this article will help you to ensure a longer lifespan of your HVAC unit and better indoor air quality. Hopefully, the tips will guide you in picking the right AC filter for your system. We recommend buying quality air filters online from Mervfilters.com. Do well-research about the AC filter size before deciding if the filter is a perfect fit. Understand your AC filters’ pros and cons beforehand to ensure peace and comfort inside your house.