Heating, ventilation and air conditioning (HVAC) and furnace filters are vital to climate control systems, which are used in many homes. With the movement of air from these systems comes the potential to move allergens and irritants as well. So it is important to change filters every 30-90 days. In order for a HVAC/furnace filter to earn Certification, strict standards for appropriate levels must be met when:

• Evaluating the capability of the filter to remove allergens and irritants from the air flow
• Monitoring fiber shedding of the filter during use
• Analyzing the seals.