Severe Duty and Explosion Proof HVAC

Engineered for performance and durability in the world's most difficult environments.

Specific Systems® InPac® Series wall-mounted industrial severe duty and explosion proof HVAC units are engineered and proven to provide safe air conditioning and stand up to the rigors and harsh conditions of corrosive and hazardous environments, including those found in refineries, water/wastewater treatment plants, and on oil drilling rigs and offshore processing plants.

  • Available for use in hazardous Class I, Division 1, Groups C, & D locations, as well as Class I, Division 2, Groups B, C, & D
  • Standard through the wall air conditioning configuration
  • Also configurable in Wall Mount, Pad Mount, Roof Mount, or Split configurations, using the same components for reduced lifetime costs
  • Built to demanding industrial specifications
  • Innovative two-stage dual refrigeration circuit provides 50% redundancy on units over 3 tons
  • Available corrosion resistant coatings and many other options
  • CSA certification, UL Listed panels, with ATEX and IECEX certification available.

InPac® units include as standard what many others consider modifications or special features. Beginning with 16-gauge powder coated galvanized steel cabinets with stainless steel fasteners and drain pans, InPacs are industrial duty by design.

Industrial Cabinet Construction

  • 16-gauge or heavier galvanized steel is standard
  • Optional 316 stainless steel, 304 stainless steel, or aluminum
  • Galvanized steel and aluminum are powdercoated in-house to a thickness of four mils, with several colors available

Redundancy: Built-in

Dual Fans

Providing conditioned air into a space is the main purpose of an ECU, and InPac® units are built to deliver.

  • Units from two tons (24,000 BTUH) to 50 tons (600,000 BTUH) utilize dual spark-proof evaporator blower assemblies
  • Two forward-curved blowers run concurrently on a double-shafted industrial grade motor
  • Two additional blowers can be optioned to serve as redundant backups
  • Main and aux fans are used to purge and pressurize the area in the event of a pressure loss, if required
  • Spark-proof axial condenser fans are standard on InPac® units

Evaporator and Condenser Coils

  • Standard coils are constructed from heavy-weight rifled copper tubes mechanically bonded to aluminum fins
  • Standard coils can be coated with our SpecificCoat™ two-stage corrosion resistant coating, designed to give you optimal protection with minimal loss of heat transfer
  • All InPac® evaporator and condenser coils interlace two completely separate refrigeration circuits
  • This allows the InPac® unit footprint to remain as small as possible while still offering the redundancy and efficiency of four separate coils.
  • Condenser coils are designed at 8 FPI to reduce clogging in industrial environments
  • Evaporator coils are designed at 11-13 FPI for efficiency
  • Highly corrosion resistant copper fin/copper tube coils are available as an option
  • Several corrosion resistant coatings are also available as options
  • Freezestats are also standard on all InPac® systems