HT Materials Science is expanding deployment of its Maxwell heat-transfer fluid additive to 15 Amazon fulfilment centres across Europe after a UK pilot reported HVAC cooling energy reductions of up to 14%.
The rollout covers sites in the UK, Germany, France and Italy. HTMS said the expansion follows pilot work at three UK fulfilment centres: BHX3 in Daventry, BHX4 in Coventry and LBA2 in Doncaster.
The company’s Maxwell technology was selected through the Amazon Sustainability Accelerator, giving HTMS the opportunity to test the additive in Amazon’s fulfilment network.
Maxwell tested in UK fulfilment centres
Maxwell is a drop-in nanofluid additive for closed-loop chilled water systems. HTMS says it is composed of inert, non-toxic aluminium oxide nanoparticles suspended at around 2% concentration.
The additive is designed to improve heat transfer in existing cooling systems without replacing major equipment. In the Amazon pilot, installation was completed during normal operations, with no facility downtime, and took around one day per site.
HTMS said the UK pilot delivered up to 14% reduction in HVAC energy consumption, an estimated 75,000 kWh in annual energy savings, a 2.25-year simple payback period and 15% ROI.
“Organizations that cannot wait for new grid infrastructure to be built are finding that our solution gives them a meaningful path forward today,” said Tom Grizzetti, CEO of HT Materials Science.
“The demand for what we do is accelerating.”
HT Materials Science is expanding deployment of its Maxwell additive to 15 Amazon fulfilment centres across Europe.
Energy efficiency without equipment replacement
According to HTMS, Maxwell can improve heat transfer by up to 15% in water-based cooling and heating systems. The company says the additive can be installed in most cases without system retrofit or shutdown.
During the Amazon pilot, Maxwell was installed into existing closed-loop chilled water systems. HTMS said results were measured in accordance with the International Performance Measurement and Verification Protocol.
The system also uses a Monitoring and Maintenance Unit to track fluid density, pH and system pressure, helping maintain nanoparticle concentration without manual intervention.
“What you see across these deployments is the same result: meaningful efficiency gains with no disruption to operations,” Grizzetti said.
“That consistency across very different environments is what makes this technology compelling for high-volume infrastructure.”
Cooling demand rises across large infrastructure
The Amazon rollout comes as large buildings, logistics facilities and data centres face growing pressure to cut energy demand while maintaining operational reliability.
HTMS said Maxwell has now been deployed across 57 projects in 14 countries. Other reported deployments include Morgan Stanley and CBRE at 1633 Broadway in New York City, ENI’s oil and gas facility in Italy, and installations with Tabreed, Ericsson and Dignity Health.
The company has also been named a 2026 BloombergNEF Pioneer, included in the CleanTech Global 100 and shortlisted in the Reuters Events Energy Industry Awards 2026.
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FAQs
What is Maxwell?
Maxwell is a heat-transfer fluid additive developed by HT Materials Science for closed-loop hydronic cooling and heating systems.
What results were reported in the Amazon pilot?
HTMS said the UK pilot delivered up to 14% reduction in HVAC cooling energy use and an estimated 75,000 kWh in annual energy savings.
Where is the rollout expanding?
The rollout is expanding to 15 Amazon fulfilment centres across the UK, Germany, France and Italy.
Does Maxwell require equipment replacement?
HTMS says Maxwell can be installed into existing closed-loop systems without major equipment replacement or facility downtime.
