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Frequently Asked Questions

Question: What is the difference between an HVAC and a HEPA filter?

Answer: HEPA is a High Efficiency Pleated Air filter with small tightly pleated media and high MERV ratings. HVAC is Heating, Ventilation, and Air Conditioning, the pleats are usually wider and wire reinforced for stability. The MERV rating is lower.


Q: What is a MERV rating?

A: A MERV (Minimum Efficiency Reporting Value) is a measure of how effective an air filter is. Filters with higher ratings can prevent finer particles from getting through than filters with lower ratings. An example of a lower merv rating filter (MERV 1-4) would be a simple throwaway fiberglass or synthetic panel filter. An average filter (MERV 8) could be a pleated filter with cotton/polyester blend material. An above average filter (MERV 9-12) could be bag or box type filters that that may contain pockets for better particle filtration. Filters with a MERV rating of 13 or above are commonly found in medical institutions for supreme filtration.


Q: What is filter foam?

A: Filter foam is a reticulated foam that has open cells to allow air or liquid through it. 


Q: How often should I replace my filter?

A: This depends on the type of filter you have. If you have a fiberglass air filter, you'll want to replace it roughly every month or so. If you have a pleated air filter, you'll want to replace it roughly every three months, depending on use. Please review your owners manual or consult with the manufacturer or supply representative if you are unsure of the replacement schedule.


Q: What type of foam can be die cut? 

A: Soft flexible polyurethane up to 2” thick may be die cut to meet your needs. Please feel free to request a quote, or contact us to learn more. 


Q: Can Burnett Process custom make a filter?

A: Yes, absolutely! Burnett Process has engineers on staff that can design and recommend a filter to meet your needs.


Q: What is anti-static foam?

A: Anti-static foam is foam that has been modified with electrically conductive materials to prevent electrical buildup and promotes static dissipation.

Q: Can foam be recycled? 

A: Yes, soft flexible foams can be shredded and used for packaging or flooring materials. Rigid foams can be melted or ground up and added to new foam mixtures.

Q: What is the FR factor?

A: In the filter business, FR stands for flame resistance or fire resistance. It is an additive added to foam or paper to resist catching fire.

Q: How deep of a mini-pleat can be made for HEPA type filters?

A: Burnett Process can pleat filter media from 1” to 4".

Q: What types of frames can be made around a filter?

A: Burnett Process can provide plastic, metal, or beverage board frames, whatever you need to best suit your needs.

Q: What types of materials can be die cut?

A: Burnett Process can die cut paperboard, rubber, foam and various soft materials. Contact our engineers to ask about your specific needs and let us come up with a custom solution that will correct your situation


Q: Can Burnett Process package my product?

A: Yes, Burnett Process can polybag individual parts or pack multiple parts into cartons.

Q: Does an ozone filter deplete ozone?

A: Ozone filters absorb the ozone gas and remove it from the air. You can learn more about our ozone filters here.

Q: What does "tackified" mean? 

A: Tackified improves the efficiency of the filter. It is an application that helps trap more airborne particulates. 


Q: Why should I choose Burnett Process?

A: Burnett Process has been making quality filters, gaskets, and foam products since 1957, and maintains customer satisfaction as our top priority. Burnett Process, Inc has local facilities in New York, Ohio, Texas and Florida; and can get you what you need no matter where you are located. We have provided companies such as Xerox, UPS, Brighton Cromwell, and the US Armed Forces with solutions to their filtration and vacuum needs, and we will continue to do so for a long time. If you need any filter, or if you need a custom filter, contact us today!

Do you still have a question? 

Please feel free to contact us at, or call 585-254-8080.