ULPA Filter vs. HEPA Filter: What's the Difference & Why Does It Matter?

by Radhika Chawla Marketer

Indoor air pollution is a severe problem in India. There are numerous dust particles, pollens, bacteria and contaminants in the air that can cause serious health risks and allergies. However, a commercial environment of pharmaceutical, electronics and medical industries require a controlled environment free of such airborne particles. 

Therefore, high-efficiency air filters like HEPA and ULPA are employed to maintain a safe environment and prevent cross-contamination. High-Efficiency Particulate Air (HEPA) and Ultra-Low Particulate Air (ULPA) are two of the most common filters used in industries such as  automobiles, biomedical, pharmaceutical, hospitals, and semiconductor manufacturing industries have a requirement of safe and filtered air. 

Both the HEPA and ULPA filters have many similarities, but they have some key differences too.


Similarities between HEPA & ULPA Filters:

  • Both the filters use dense fibers to create a fine mesh to filter the contaminated air.
  • Same filtration process: diffusion, interception, and inertial impaction. 
  • Both the filters do not remove odours and gasses and may require an activated carbon filter. 


Difference between HEPA & ULPA Filters:

  • HEPA the filter removes airborne particles 0.3 µm in diameter and ULPA filter removes 0.1 µm in diameter. 
  • HEPA filters have 99.995% efficiency and ULPA filters have 99.999% efficiency in removing airborne particles.
  • The ULPA air filter media is denser and allows 20 to 50% less airflow than HEPA filters. 
  •  HEPA provides ISO Class 3 and ULPA provides ISO Class 5 filtration. 
  • HEPA has a lifespan of up to 10 years and ULPA can be effective for 5 to 8 years.
  • HEPA requires less energy than ULPA filters.
  • HEPA filters can be combined with pre-filters to trap larger particles before they come into contact with the main filter to increase efficiency. 
  • Overall, ULPA filters are less efficient at reducing the airborne particulate in a typical room. 


HEPA and ULPA filters are critical in preventing cross-contamination, infections and allergens from entering residential and commercial environments. Apart from the production of medicines, electrical equipment, biomedical matters, etc., there are various pieces of equipment too that require a clean an environment such as:

  • Laminar floor hoods
  • Biosafety Safety Cabinets (BSC)
  • Containment gloves boxes
  • Ductless exhaust fume hoods
  • Closed-loop filtration glove box


Different ULPA & HEPA air filter media can be used in the filters as per the required airflow and filtration in any industry. To buy high-quality and high-efficiency filter media, click here HVAC Air Filter Media.

Sponsor Ads

About Radhika Chawla Innovator   Marketer

29 connections, 0 recommendations, 79 honor points.
Joined APSense since, November 30th, 2020, From Haryana, India.

Created on Feb 23rd 2021 06:27. Viewed 384 times.


No comment, be the first to comment.
Please sign in before you comment.