This page answers the most frequently asked questions on Air Filters and air filtration. Should you have any questions, which are not covered here, please submit it via e-mail at: info@synfil.com or just fill our the customer feedback form available in the policies and info section of this web site.

• Comparison of 1" filters
  
• What is MERV?
  
• What is a Filtrete Filter?
  
• Why most of the high efficiency filters are pleated?
  

• What is the definition of an allergen?
  
• What type of allergens are found in common households?
  

• What are some of the indoor air concerns?
  
• What methods can be used to control indoor air pollution?