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Heat Transfer Fluids

No matter the heating & cooling needs, KOST USA's family of glycol-based heat transfer fluids offers a solution that will exceed your requirements. Applications include HVAC, Refrigeration, Food, Beverage, Pharma & Chemical Processing. Light & Heavy Duty to a USDA Bio-Preferred Solution we can customize products to meeting all engineering requirements where glycol based products are required.

Heat Transfer Fluid Brands

BIOChill KOSTChill

Heat Transfer Fluid FAQ’s

What is the difference between Ethylene Glycol and Propylene Glycol?

Propylene Glycol has a slightly higher viscosity, a slightly lower heat transfer efficiency, does not perform quite as well in colder temperatures as Ethylene Glycol; however, the advantage of Propylene Glycol over Ethylene Glycol is a lower acute oral toxicity.

What are the desired properties of a heat transfer fluid?

Low freeze point, high boiling/flash point, high thermal conductivity, high specific heat, low viscosity, low vapor pressure, high thermal stability, a high degree of material compatibility, and high level of environmental friendliness.

What is the difference between regular duty and heavy duty?

Regular Duty formulated products should be used in applications that operate between -60 degrees F and 250 degrees F. Heavy Duty formulated products should be used in applications where the temperature exceeds 250 degrees F continuously or intermittently for a significant portion of the time.

What are some typical applications of each?

Regular Duty = Office Buildings, Schools, Universities, Hospitals, Hotels, Apartment Buildings, Resorts, and Residences. Others include process cooling, ice skating rinks, sidewalk de-icing, and food processing and storage facilities.

Heavy Duty = Large Stationary Engines, Natural Gas Line Heaters, Refinery Heating and Cooling, Chemical Process Plants, Pulp and Paper Process Plants, Steel Mills, High-Temperature Plastic Injection Molding Plants, Asphalt Melting Operations, and Solar Heating Systems. 

Do you offer a product suitable for use where incidental contact with food or beverage is possible?

YES – KOSTChill™ PG FG and BioChill® PG FG.

What is the shelf life for KOST’s HTF products?

Typically two years if stored in a cool, dry, controlled environment out of the elements.

What is the minimum recommended dilution %?

KOST USA recommends a dilution percentage no lower than 30% to prevent bacteria growth.

If I buy concentrate and dilute myself do you have water specifications I should consider?

De-ionized or reverse osmosis water should be used. Ideally, water should be used that is free of dissolved minerals which directly contribute to scale formation. Scale reduces the fluid’s ability to transfer heat and can lead to engine cooling system failures. Municipal or well water can contain amounts of dissolved minerals and fine particulate and is not recommended to dilute coolant concentrate for this reason. Di-ionized water is specifically processed to remove dissolved minerals and particulates making it ideally suited for use in coolants.

Do you use virgin raw materials or recycled?

KOST USA uses only high-quality virgin raw materials in our products. A product made from recycled glycol will almost always be lower in price but at what cost. The recycled glycol has already been used once and no matter how well the reclamation process works the fluid may contain impurities that will likely cause system contamination as well as reduced fluid life.

Do you have concentration recommendations based on freeze protection you can offer?

Yes – KOST USA can offer engineering data to assist in recommended concentration levels based on the desired freeze protection. Please contact your KOST USA Sales Development Manager.

Do you offer environmental services to help haul away used glycol?

Yes – KOST USA can assist in disposal of used fluid. Please contact your KOST USA Sales Development Manager.

How can I tell if the glycol in an existing system is still within specifications?

By utilizing the KOSTCare™ Fluid Analysis Program. Please visit the link for more information.
How can we help?




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1000 Tennessee Ave. Cincinnati, OH 45229  |  PH: (800) 661-9391 |  sales@kostusa.com










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