All About Air Filters

According to HVAC contractors, many homeowners don’t know the right air filters that they should buy. Filters are grouped into different categories depending on the minimum efficiency reporting value (MERV). For you to buy the right units you need to pay close attention to the MERV rating of the filter. The ratings are:

MERV 1-4: Filters in this range will provide you with minimal filtration. The units will keep dust off your equipment, but they won’t improve the air quality in the house.

MERV: 5-8: Air conditioning experts recommend that you use filters in this range. They are able to effectively capture small air particles that aggravate allergies without restricting airflow.

MERV 9-12: They are recommended for people that have multiple pets and suffering from severe allergies. Since they are highly efficient, they easily get rid of pet dander thus, you aren’t exposed to the allergens.

MERV 13-16: Due to their high-efficiency levels, they are recommended for hospitals, smoking lounges and other superior commercial applications. According to contractors, it’s rare to find filters of this range in homes.

MERV 17-20: Filters in this range are known as high-efficiency particulate absorption (HEPA) filters. They are highly efficient and often found in vacuum cleaners.

Guide to taking care of your filters

The basic thing that you need to do to take care of filters is changing them where you need to change them depending on your needs. If you live alone without pets or allergies, you can replace your filter after 3-6 months. If you have a number of pets and have allergies or other respiratory problems, you should change the air filter every 30-45 days. Studies show that most homeowners forget to replace their filters and this jeopardizes the quality of air in their houses.

If you are fond of forgetting to replace the filters, set automatic reminders on your phone. If you have installed the filter in your air conditioner, you should purchase a thermostat that changes its color when it’s time to replace the air filter. There are a few HVAC contractors that allow you to subscribe to their email notifications where they send you email alerts when it’s time to replace your filter.


This is what you need to know about air filters. When buying them ensure that you buy them from a reputable home improvement store. Also, replace your filter at the right time. If you don’t have time to replace it, hire a professional to help you out.