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An Up-Close Look at the Most Energy Efficient Bag Filter on the Market

By July 12, 2021 July 16th, 2021 No Comments
10 minutes to read

What Is A Bag Filter?

Bag filters, commonly used air filters in industrial and commercial HVAC systems, can be used as the sole air filter solution or as prefilters in front of final filters for applications experiencing a high dirtload. Bag filters, also referred to as pocket filters, are frequently used in residential buildings to improve indoor air quality and comfort. With a lower resistance to airflow, higher dust holding capacity and longer lifetime than other filters, bag filters may be the perfect solution for many applications.  

The Only Bag Air Filter that Doesn’t Require a Prefilter

Because of its unique construction, which uses tapered pocket stitching to prevent pocket contact throughout the depth of the filter ensuring uniform airflow and optimal use of the media area, Camfil’s Hi-Flo ES is the only bag filter in the HVAC industry that does not require a prefilter. To maintain flexibility regardless of turbulence or variance in airflow, as well as eliminate air bypass through stitching points, pocket stitching is sealed. The results: lower labor costs, a longer filter life, fewer filter changes, lower HVAC energy costs, lower disposal costs, and an overall more environmentally-friendly product. 

Why Choose Camfil’s Hi-Flo ES?

Lower HVAC energy use than competitive filters.

Compared to competitor filters, the Hi-Flo ES uses 27-50% less energy through the HVAC system. Hi-Flo ES pocket filters improve indoor air quality while reducing energy consumption. The Hi-Flo’s conical pockets, seam design, and stitching technique allow air to flow as freely as possible through the filter. This lower resistance, combined with filter media engineered to capture and hold a large volume of airborne dirt,  results in improved filter performance, and considerably lower life cycle cost of the filter. 


Longer life than competitive filters. 

As well as reducing HVAC energy consumption costs, the Hi-Flo ES lasts 25-50% longer than comparable rigid filters on the market, saving labor and filter replacement costs. In addition to lasting 12 months or longer guaranteed, the Hi-Flo ES is complete with several design features that make it easy to install and replace, including cleverly designed packaging that allows for up to eight filters to be carried at a time by a single person.  This packaging takes up just a quarter of the space that rigid filters do which equates up to a 70% reduction in disposal cost.


Read a summary of the Hi-Flo ES highlights here. 

Camfil Hi-Flo ES Basics

An overview of the Hi-Flo ES unique product specifications:


APPLICATIONS Multi-pocket, high-efficiency filters with tapered pleats and pockets available in 12″, 15″, 22″ and 30″ depths
GUARANTEED SERVICE LIFE Guaranteed up to 12 months even without a prefilter
MATERIALS Frame:  Plastic, ABS

Media:  Glass fiber that maintains MERV value for the duration of service life

Gasket: Neoprene

EFFICIENCY Available in MERV 15/15-A, MERV 14/14-A, MERV 13/13-A, and MERV 11/11-A
  • 5-Star ECI value  (indicates that the filter performs in the top 20% of all similar products across the HVAC industry)
  • Listed as UL 900 by Underwriters Laboratories 
DEPTH Available in 12”, 15”, 22”, and 30” depths


(Find the full product specifications here.)  

Camfil Hi-Flo ES Applications 

As a powerful, long-lasting air filter available in four depths and four efficiency levels, the Hi-Flo ES can be used in a wide range of HVAC applications across industry segments. 


Protection Against Wildfire Smoke. 

As summer approaches, the threat of wildfires becomes more prominent. In recent years, wildfire season has been lasting longer and starting earlier, causing more destruction to nearby communities, as well as spreading harmful contaminants far and wide as smoke is carried hundreds of miles or more from the site of the fire. 90% of wildfire smoke is made up of PM2,5 particulate, or particulate less than 2.5 microns (or 0.0001 inches) in diameter, causing a range of health problems from allergy-like symptoms to aggravating chronic heart and lung conditions.


When wildfire pollution enters the HVAC system of a hospital, office building, school, or other public building, it can have the following effects: 

  • Destroying or damaging products and equipment in production facilities.
  • Exposing patients in hospitals to increased risk and complications in a wide range of health conditions.
  • Decreasing productivity in office buildings and schools. (Read about the relationship between indoor air quality and productivity here.) 


Camfil’s Hi-Flo ES is one of several air filters produced by Camfil that can protect building inhabitants and guests from the risks of wildfire smoke. Ensure a rating of MERV-13A or higher for the best protection.


Food Safety Applications

Clean air is crucial to food and beverage manufacturing processes, not just for protecting the quality of the final product, but also because contaminants in the air can interfere with the function of production equipment. 


In one case study, a North American packaged food manufacturer with operations across the world was able to cut filter costs by 26% each year using the Hi-Flo ES with Camfil’s 30/30 panel filter as a pre-filter. 

About Camfil Clean Air Solutions

For more than half a century, Camfil has been helping people breathe cleaner air. As a leading manufacturer of premium clean air solutions, we provide commercial and industrial systems for air filtration and air pollution control that improve worker and equipment productivity, minimize energy use, and benefit human health and the environment. We firmly believe that the best solutions for our customers are the best solutions for our planet, too. That’s why every step of the way – from design to delivery and across the product life cycle – we consider the impact of what we do on people and on the world around us. Through a fresh approach to problem-solving, innovative design, precise process control and a strong customer focus we aim to conserve more, use less and find better ways – so we can all breathe easier.


The Camfil Group is headquartered in Stockholm, Sweden, and has 33​ manufacturing sites, six R&D centers, local sales offices in 30 countries, and about 4,80​0 employees and growing. We proudly serve and support customers in a wide variety of industries and in communities across the world. To discover how Camfil USA can help you to protect people, processes and the environment, visit us at