When it comes to your indoor air quality, it’s important to be aware of what factors contribute to ill health. A common misconception that many homeowners have about their HVAC systems is that the air filter within it is all they need for proper indoor air quality. This is simply not the case, though.
That air filter is there to protect the inside components of the HVAC system itself, from dust, dirt, and debris that could otherwise be allergens for you. True, the air filter does help a little for indoor air quality, but that is really not its sole purpose.
This myth about air filters can actually leave you with an air conditioner that makes your air quality worse, as you may not realize you need to change it every 1-3 months (depending on the type of air filter and the level of contaminants in your home.