Product focus: Thermox DTX Thermal Fluid


13 October 2023


Hydratech have been formulating and manufacturing heat transfer fluids, glycol formulations, antifreeze solutions, corrosion inhibitors, water treatment and conditioning chemicals to protect cooling and heating systems for over 25 years.

In 2010 Hydratech launched Thermox DTX, a pioneering non-toxic heat pump thermal fluid formulated to improve system efficiency, save energy, and provide comprehensive system and component protection.

Commissioned in thousands of commercial and domestic heat pump systems, the high efficiency heat transfer fluid – via a patented the DeTox™ additive - utilises the advantages ethylene glycol has over propylene glycol, whilst delivering a nontoxic solution.

Key benefits of Thermox DTX over traditional propylene glycol based fluids include:

  • More efficient heat transfer
  • Easier to pump, especially at low temperatures
  • Less volume for the same freeze protection
  • Cheaper per litre

Specified by the UK’s largest heat pump contractors, installers and designers, including Kensa, Nu-Heat and Ideal, Thermox DTX is formulated with multimetal and multi-function inhibitors, to protect heat pump pipework and system components from internal corrosion, scaling and biological fouling. Classified as non-toxic and food-safe, the Hydratech product is readily biodegradable (90% over ten days) and will not remain in the environment or bio-accumulate.


Thermox DTX: at the heart of the UK’s leading heat pump projects

Hydratech are committed to helping the UK achieve zero emissions by 2050. A recent collaboration saw Hydratech work as technical partners on a turn-key heat pump project, capable of producing 12% of the UK’s tomatoes. Low Carbon Farming’s mega-greenhouse projects in Norfolk and Suffolk, a world-first for renewable heating has 70 acres of greenhouse growing space - five times more glass than the Shard, and over 10km of underground pipeline. Utilising Thermox DTX fluid technology, the carbon footprint of the food produced at the sites is expected to be 75% lower than equivalent European greenhouses, and 10 times more productive than fi eld farming. Other projects benefi tting from DTX technology include Scotland’s new national energy and sport centre, Rolls Royce’s on-site CHP at their primary manufacturing plant, and numerous council renewable housing schemes.


Working with you

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For over 25 years, Hydratech have been assisting the renewables industry with fluid selection - utilising over 150 years combined experience in all aspects of heating applications. Whether your priority is cost, thermal efficiency, environmental impact, toxicity, corrosion resistance or a combination of all these, Hydratech has a fluid to suit.


Thermox DTX Properties

Non-Toxic: Tested and classifi ed as Non-Toxic by an EPA certifi ed laboratory.

Optimum Flow: Thermox DTX has improved heat transfer characteristics. Including lower dynamic viscosity and higher thermal conductivity.

System protection: Thermox DTX contains synergistic corrosion inhibitors to protect metals commonly found in such systems. It has been independently tested and found to meet BS6580 and ASTM D1384 corrosion standards. Thermox DTX also contains scale and biological inhibitors to help prevent fouling – thus promoting long operational life and high thermal efficiency.

Frost protection: -50°C depending on concentration.

Biodegradability: Thermox DTX mixtures are readily biodegradable (90% over ten days) and will not remain in the environment or bioaccumulate.