Closed circuit cooling towers

BAC participates in the ECC programme for cooling towers.
Check ongoing validity of certificate

BAC closed circuit cooling towers PFI, FXVS, and NEXUSTM are CTI-Eurovent certified. Read the benefits of certified cooling towers.

Closed circuit cooling towers or fluid coolers operate just like the open type, but dissipate the process fluid heat load into the ambient air via a closed circuit heat exchanger. This isolates the process fluid from the outside air, keeping it clean and free of contamination in a closed loop and creating 2 separate fluid circuits:

  1. An external circuit, in which spray water circulates over the closed circuit heat exchanger and mixes with the outside air.
  2. An internal circuit, in which the process fluid circulates inside the closed circuit heat exchanger.

During the evaporative cooling operation, heat goes from the internal circuit, via the closed circuit heat exchanger to the spray water, and then to the open air as a portion of the evaporating water.

The key benefits of closed circuit cooling towers are:

  • Contaminant-free cooling circuit
  • Dry operation in winter
  • Reduced system maintenance
  • Lower overall system costs thanks to year-round savings on maintenance, water, energy and water treatment

A unique benefit for all BAC closed circuit cooling tower customers:

Baltimore Aircoil offers various closed circuit cooling tower configurations, each of which offers you specific benefits as listed below.

Overview of BAC closed circuit cooling towers

         BAC closed circuit cooling towers
Induced draft        
Forced draft        
Axial fan        
Radial fan              
Centrifugal fan          
Combined flow          
Water saving technology          
Specific product line benefits
Low Sound +++ +++ +++ ++ ++ ++ ++ ++
Energy Efficiency + + ++ +++ +++ +++ +++ +++
Easy Maintenance ++ ++ ++ +++ +++ +++ ++++ ++
Operational safety (hygiene) ++ ++ +++  +++ +++ +++ ++++  ++

Want to know more about closed circuit cooling towers? Ask your local BAC representative for more information.



  • Prevents airborne contaminants entering or fouling the system
  • Less maintenance
  • Minimal water treatment
  • Free cooling possible
  • Dry operation in winter
  • Closed loop in single piece of equipment