Replacing the filter on air conditioner is an important part of its maintenance schedule. Depending on where you live and how much use you get out of your AC, you should generally be replacing your air filter at least once every few months. However, there's more to selecting and installing a new air filter than meets the eye, so be sure to keep these tips in mind.

DO Look at Efficiency Scores

Not all air filters are created equal. If you visit the air filter aisle of your local home improvement store, you might be surprised to see the wide range of filter prices. Why would you go with the $20 filter when you can get one for less than $5? Well, when it comes to air filter, you'll get what you pay for. In fact, AC filters are typically assigned a score based on their efficiency; the higher the score, the better the efficiency rating on the filter. Going with a higher efficiency filter can save you money in the long run by helping your home's AC unit run more efficiently, so spending those few extra bucks might be worth it.

DO Consider a HEPA Filter

If people in your home suffer from allergies or asthma, then you might want to consider going "all out" by purchasing a High Efficiency Particulate Air (HEPA) filter. These types of filters are specially certified and have to adhere to strict filtration standards that were specifically designed for people with allergies and asthma. These air filters cost a bit more than your standard spun-glass or polyester air filter, but they also do a much better job at keeping allergens and debris out of your home.

DON'T Forget to Write Down the Size

Before you head out to purchase a new air filter for your air conditioning unit, don't forget to note the size of the old one (or refer to your AC unit owner's manual, to be safe). You might think that all filters are more or less the same size, but there are actually many different filter dimensions available--and having the wrong size in your home can make a huge difference in your indoor air quality. 

Changing the air filter in your home's AC system is important for keeping your unit running efficiently and maintaining high air quality in your home. Be sure to keep these tips in mind before you change yours out. If you want help from more professionals as you are trying to figure out what to do, click for more help on a site like this.