Purge & Pressurization

Tru-Temp™ Modified Purge and Pressurization

Northern Air Systems Tru-Temp™ Modified Purge and Pressurization Units are for use in hazardous areas and are Class I, Division 1 & 2, as well as Class II systems. These units are typically used for declassified interior areas of buildings within hazardous locations such as Refineries, Onshore and Offshore Oil & Gas facilities, Plastics manufacturers, and Marine applications. This method of protection provides significant cost savings compared to a building with all explosion-proof equipment in the interior. Blower housings are designed around the project specifications and designed to meet NFPA 496 standards and available with wide variety of customized options.

Give us a call to discuss a solution for your project. All our units are fully tested and inspected prior to shipping.


  • Mobile Medical
  • Television Broadcast
  • Command Centers
  • Marine
  • Hazardous Locations
  • Oil & Gas
  • Drilling Rigs
  • Refineries
  • Plastic Manufacturers
  • Military
  • Custom


  • Stainless Steel or Powder Coated Finish
  • Reverse Incline Blower for General Purpose and Explosion Proof Applications
  • Class 1, Div. 1 TEFC Motor and non-sparking Blower for Division 1 application
  • Filtration made to order and comes standard with Washable Aluminum Mesh
  • Fresh Air Stacks
  • Loss of Room Pressure Alarm
  • Low Leak Fresh Air Dampers
  • Mounted on Unit or Standalone
  • Purge and Pressurization NFPA 496 and General Purpose
  • Custom options available on request
  • NEC & IEC Compliant