Redundant Wall Mounted Systems Series


Redundant, wall or pad mounted, combination air conditioner and pressurization systems for use in hazardous applications


  • Factory certified for compliance to applicable codes and standards
  • Spark resistant fan and blower construction
  • EPA approved HFC type refrigerants
  • Single cut-out requirement for building wall
  • 100% redundancy via individual, removable HVAC units mounted onto single skid
  • Supply and return air registers for ductless air handling
  • Through-the-wall controls section for indoor access to operating controls
  • Built-in, automatic controls and equipment to manage safe air and maintain positive pressure and purge air flow to meet NFPA 496, Type X, Y, or Z requirements for the space
  • Protective coatings for prolonged life of cabinet and chassis


  • Redundant nominal cooling from dual 4 tons to dual 25 tons
  • Electric heat (limited by temperature code and system size)
  • Single or three phase operation in 60 or 50 Hz applications
  • Configurable for operation in various non-hazardous and hazardous rated locations
  • Type 304 or 316 stainless steel cabinet and chassis for corrosion protection
  • Corrosion resistant coatings for refrigerant coils and tubing (proven to withstand 10,000 hours of salt spray test)
  • Protective component coatings for prolonged life in corrosive environments
  • Totally Enclosed Fan-Cooled (TEFC) motors
  • Advanced chemical filtration packages
  • Fresh air stack with bird screen and rain cap
  • Supply duct connection and optional ductwork for building interior
  • Low/High ambient packages for operation in extreme environments


  • Environmental control
  • Control rooms, living quarters, plant office buildings, break rooms, and other manned applications.
  • MCC, RIE, DCS, LER, power, and switchgear buildings