Pleated air filters are better than fiberglass air filters. Our pleated air filters last 3-6 months (depending on the size and the filtration needs of your home) and capture over 85% of air particles in your space. Fiberglass filters, made of spun glass, last an average of 30 days, and capture a much smaller percentage of air particles. You may pay more up front for the pleated filter, but it will pay you back in better air quality and less waste.