Maintaining the purity of the air inside your HVAC system requires selecting the appropriate air filter. This video compares and explains the variations in MERV 8 and MERV 11 filters' filtration efficacy and performance. Select the option that best satisfies your needs to give you and your family improved air quality and a more comfortable environment. Knowing the differences between these two filter classifications will help you make an informed choice for the air quality requirements of your house.