As AI, cloud computing, and high-performance computing increase rack density, data centers need cooling systems that reliably and efficiently move larger heat loads.
DOWFROST™ LC 25 and DOWCAL™ heat-transfer fluids can be used together across separate, connected cooling loops within the same facility. Rather than mixing in one circuit, each fluid supports a different stage of the cooling process, with heat exchangers transferring thermal energy between the loops.

How the Two Fluids Work Together

A DOWFROST™ LC 25-based loop can support heat collection near the data-center environment, carrying heat from cooling equipment to a coolant distribution unit or heat exchanger.  
At this interface, heat is transferred to a separate DOWCAL™ circuit. The fluids remain physically isolated, while the DOWCAL™ loop carries heat through the wider facility network to chillers, dry coolers, heat-recovery equipment, or thermal-energy storage systems.  

The cooling pathway can be summarised as:

Data-center cooling equipment → DOWFROST™ LC 25 loop → heat exchanger → DOWCAL™ loop → heat rejection or recovery. 

Supporting Reliable Closed-Loop Performance. Both product families combine glycol-based heat transfer with formulated corrosion protection. Depending on the selected grade and concentration, they can help support: 

• Efficient heat transport 

• Freeze and burst protection 

• Corrosion control 

• Protection of pumps, piping, and heat exchangers 

• Stable performance across changing operating conditions 

Using separate fluids across dedicated loops also allows each circuit to be designed around its own temperature range, materials, flow requirements, and safety considerations, helping support more targeted system performance.  

Extending Cooling into Heat Recovery  

Once heat is transferred into the facility-side DOWCAL™ loop, it can be rejected outdoors or redirected for useful purposes such as building heating, hot-water preheating, industrial processes, or thermal storage.  
This creates a coordinated thermal management system that moves heat from the data hall to the point where it can be released, stored, or reused, helping extend the value of captured heat.  

A Connected Approach to Data-Centre Cooling  

By using DOWFROST™ LC 25 and DOWCAL™ in separate but thermally connected circuits, data-center operators can create a more structured approach to heat transfer, freeze protection, and corrosion control across the complete cooling infrastructure, while supporting efficient operation. 

Planning or upgrading a data-center cooling system? Talk to our experts to develop a coordinated DOWFROST™ LC 25 and DOWCAL™ fluid strategy for your application.