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Refrigeration Evaporators

A+ Series® Air Coolers - Industrial Air Coolers - A+R


"Above Rail" style evaporator for use in food processing rooms where cleanability and workspace is critical. Designed for worker comfort and maximizing the use of workspace. Colmac Coil offers both a standard A+R and low profile configuration.   

Hygienic design 

  • Hinged access panels on both sides standard for easy access
  • Stainless steel materials of construction 
  • Full coverage insulated drain pan eliminates condensation and dripping
  • Drainpan edge is angled inward, directing water into the pan
  • Optional clean in place (CIP) piping available
  • Anti-Microbial or Epoxy Coated fin material options
  • Passivated welds to protect against contamination
  • Washdown duty motors available   


Easy installation and service

  • Air deflector design provides good air coverage and is easy to remove for servicing the motor
  • Hinged access panels on both sides standard for easy access to the coil core
  • Designed for optimal recirculation rate to reduce system refrigerant charge


Maximize use of space and worker comfort

  • Low installation height: 20-30” for low profile configuration and 30-50” for standard configuration
  • Optimized fan speed for low sound pressure
  • Exposed fins on the lower edge of the entering row for increased airflow


A+R Standard

Aircoolers Ar 3
Aircoolers Ar 4
Aircoolers Ar 5
Aircollers Ar 6

Designed to fit your footprint

  • Capacity range: 3 – 25 TR
  • 1-8 fan configurations  

Tubes/fins options

  • Aluminum tubes/aluminum fins
  • Aluminum tubes/epoxy coated aluminum fins
  • Steel tubes/galvanized steel fins  
  • 304 Stainless steel tubes/ 304 stainless steel fins
  • 304 Stainless steel tubes/aluminum fins
  • 304 Stainless steel tubes/epoxy coated aluminum fins
  • 304 Stainless steel tubes/anti-microbial alloy fins
  • 316 Stainless steel tubes/ 316 stainless steel fins
  • 316 Stainless steel tubes/aluminum fins
  • 316 Stainless steel tubes/epoxy coated aluminum fins
  • 316 Stainless steel tubes/anti-microbial alloy fins

Coil casing 

  • G-235 galvanized steel  
  • 304 stainless steel
  • 316 stainless steel 

Fan type

  • Composite
  • Aluminum
  • Stamped Aluminum 


Hygienic full coverage drain pan design

  • The A+R drain pan extends beyond the length and width of the air cooler, providing full coverage, preventing drips and splashing. 
  • The edge of the drain pan is angled inward, directing water into the pan. 
  • Drain pan is fully mounted before shipping. 

Drain pan options

  • Fully seal welded drain pan
  • Galvanized steel
  • Heat tracing 

Defrost options

  • Air
  • Electrical
  • Hot Gas
  • Interlaced Glycol 
  • Water

Refrigerant feeds

  • Recirculated top feed
  • Recirculated bottom feed 
  • Flooded 
  • Direct expansion


  • Ammonia, C02, R22, R507A
  • Calcium Chloride, Ethylene Glycol, Patassium Formate, Propylene Glycol, Water 

Electrical options 

All A+R air cooler fan motors come factory wired to a common terminal box.

  • The A+R is by default equipped with individual terminal strip.
  • VFD compatible
  • 230 - 380 - 460 - 575/60/3 or 200 - 400/50/3 supply power   

Fan motors 

  • Totally enclosed air over (TEAO) motor
  • C-Face motors up to 1 Hp
  • Wash down duty motors available 

Hinged access panels on both sides


Air deflector design

A+R Air Deflector

Colmac Coil R&D Enginners developed and extensively tested the A+R air deflector that provides both a low installation height and directs air outward. 

  • Easily removed for servicing motor
  • Directs air outward, providing good air coverage

Weld finish levels

  • Level 3 and 4 available 

Clean in place (CIP)


  • Provides complete spray coverage of the entire coil core
  • Automated and repeatable cleaning process
  • In rooms above freezing, CIP provides a means of water defrost 


Enhanced tube technology 


Smart hot gas defrost


Smart hanger system


Aluminum-to-steel bimetallic couplers


A+R Low Profile


Colmac Coil developed a low profile A+R configuration for ultra low ceiling heights. To accommodate the lower installation height, there are a few differing features from the A+R standard design:


  • 20 - 30 inch installation height
  • Fan Rows: 2-6
  • 1/4 horsepower motor
  • Bolted 48 frame motor 
  • 230/60/1 or 460/1 phase 
  • Not inverter ready  

AR-unit -assy -RF---Low -profile ---white -background (1)

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