Pfannenberg, the first Global Manufacturer to offer UL Listed Filterfans – Worldwide

TRUST IN THE ORIGINAL

Our invention of the Filterfan® in 1958 was a milestone in the area of industrial thermal management. Today Pfannenberg provides a wide range of different solutions for industrial thermal management and is thus one of the few specialists that can provide the appropriate devices for virtually all industrial thermal management requirements – worldwide.


With the UL Listed Certification Pfannenberg is the only global manufacturer who offers to its customers a certified robust product, dedicated to harsh environmental requirements, without further protection –  worldwide.


Easy Integration

UL Listed Filterfans® meet the demand of Pfannenberg global customers by helping them save time, efforts and money when their application needs to be UL approved.

Pfannenberg’s unique Filterfans® also feature an innovative “Click & Fit” mechanism with a patented 4-corner fastening system enabling safe and quick, tool-free installation allowing the filter medium to be replaced in seconds.

All in all, our Filterfans® 4.0™ contain 11 well-thought out patent protected features.

Recognized Quality

Being UL Listed proves that Pfannenberg Filterfans® follow industry standards and national safety standards. Pfannenberg Filterfans® are made from high quality, durable ABS plastic that stands up to shock, vibration and wide temperature ranges found in the industrial environment.

In addition to UL certification, Pfannenberg Filterfans® carry an out-of-the-box IP55, NEMA Type 12 system of protection. Optional Filterfan® models include an EMC and UV resistant designs.

Performance, Installation & Maintenance – YOUR ADVANTAGE

Pfannenberg Filterfans® offer an enormous degree of service, mounting and maintenance-friendliness due to:

  • Industry Standard integrations: Filterfans® can be seamlessly integrated into industry standard enclosure cut-outs.
  • Reduced Installation Costs: The patented 4-corner fastening system allows a tool-free installation in seconds and guarantees a secure hold.
  • Easy Maintenance: The design cover’s fastening system with grill supporting hinge requires only a single hand to replace the filter mat in seconds.
  • Optimized airflow: Airflow optimized fins and rotor blades guarantee maximum airflow with minimal energy consumption using high performance louvers and more surface area on fluted filter mats.
  • Extended Lifetime: With our fluted filter mats, Filterfans® reach NEMA Type 12 protection. Additionally, the fluted mats extend service life by 300% requiring less frequent replacements.
  • Additional Accessories: Filterfans® can be used with thermostats to reduce energy & maintenance costs. NEMA TYPE 3R/4/4x and IPx6 Rainhoods (see below) are also available in steel and stainless steel for outdoor and wash down applications.

>> Click here for more information about our Filterfan® range


Industry First UL Listed Rainhood Solution

Pfannenberg Rainhoods (Patent Pending) feature a robust design rated to NEMA TYPE 3R/4/4x and IPx6 when used with Pfannenberg Filterfans®.

Options include painted galvanized steel, stainless steel and FDA compliant food and beverage grade versions.

NEW Sanitary Rainhood: In addition to our standard painted and stainless steel designs, Pfannenberg also offers a specialty 4X stainless steel rainhood to meet the FDA compatible requirements found in Food & Beverage Manufacturing Facilities.


With the UL Listed certification, Pfannenberg proves once again that The Original Filterfan is the best choice to guarantee trusted Thermal Management, for all applications, worldwide.

Topics: FilterfansCompany News & Annoucements

Case study: Pfannenberg Cooling Units to meet Wood Manufacturing needs

An end user turned to Pfannenberg for assistance with managing their enclosure temperatures in a particularly harsh environment. The company produces high-quality construction and installation materials from wood fiber.

Customer Requirement

The customer current system was facing system failures and downtime due to severe soiling from wood dust and rust particles from diesel-powered fork lift trucks and heavy equipment. The current thermal management solution used conventional point-of-entry filters and top-mounted filterfans. The current cabinet system had to be completely changed as it needed to be reliable despite severe air contamination from wood dust and exhaust gas, plus provide energy savings and service friendliness.

The Pfannenberg Solution

As a first step, all the switch cabinets were wet cleaned, both inside and outside.  To rule out any repeat soiling, the top-mounted fan combination was replaced by partially recessed cooling units: DTI 6301 Model.

Special features of the cooling units are:

  • Uniquely high energy-efficiency rating (EER)
  • Significant energy savings/operating costs reduction
  • Condenser with wide fin spacing for highly effective protection against contaminated ambient air
  • Large distance between intake and exhaust vents (to eliminate hot spots)
  • Perfect ease of servicing
  • New service interface for easy retrieval of parameter settings/history (Pfannenberg Plant software necessary)
  • Optional filter can be retrofitted in a few seconds
  • Energy-savings mode in the Multi Controller integrated as standard

Customer Benefits

Use of the new DTI 6301 cooling units led to reliable system operation and to the highest possible amount of machine up time. The environmental and cost balance sheets demonstrated considerable reductions with regards to energy costs and CO2 emissions, as well as reduced service requirements and repair times.


Have a question regarding which equipment is best for your application? Contact our engineering team for more information!


Pfannenberg, Inc. is a global manufacturer of Thermal Management, Liquid Cooling Solutions and Signaling Technologies.

Pfannenberg is proud to provide solutions as a single source to its customers. Our business philosophy – Protection for man, machine and the environment.

Topics: Enclosure CoolingCooling UnitsThermal Management