A transport membrane condenser pulling clean hot water out of exhaust gas.
In developmentStartup
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Receive a weekly email digest of the latest energy efficiency solutions added by the network.Browse 858 solutions in energy efficiency solutions on the Halo network
Updated Sept 29, 2026
Energy efficiency solutions covers using less energy for the same output. On Halo, the solutions cover recovering waste heat and water, process intensification and control, insulation for retrofit, and roof and cooling surfaces. Sign up to search the full network and post your specific need.
Recovering waste heat and water
WW
City University Hong Kong
Cascade recovery from exhaust steam, driven by the waste heat itself.
ConceptualUniversity
RF
Wageningen University and Research
A contactor recovering 90% of the water vapor and its latent heat.
ConceptualUniversity
A MOF desiccant recovering water vapor on industrial waste heat.
In developmentStartup
BE
Georgia Institute of Technology
A hydrogel absorbing 8 kg of water per kilogram, inside a steel plant.
In developmentUniversity
TP
CO2-based heat recovery and heat pumping for an extraction process.
Co-developmentIn developmentSupplier
Clean and Sustainable Energy System PTY LTD
Multi-stage vacuum distillation on facility waste heat, at near-zero emissions.
Co-developmentIn developmentStartup
Process intensification and control
Microwave energy applied to intensify a refining process.
Co-developmentIn developmentStartup
AJ
Xiera Technologies Inc
Fuzzy logic handling several variables at once in a plant controller.
In developmentStartup
Heat integration recalculated in real time as the cascade shifts.
In developmentStartup
XL
Washington University in St. Louis
TPMS foams raising heat and mass transfer with little pressure drop.
Co-developmentIn developmentUniversity
QF
Michigan State University
Townsend discharge used to condense vapor at lower energy cost.
In developmentUniversity
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Who is working on energy efficiency solutions
Organizations in energy efficiency solutions
Universities, startups, and suppliers with solutions in energy efficiency solutions.
Energy efficiency companies
Innovators in energy efficiency solutions
Researchers and inventors advancing energy efficiency solutions.
Energy efficiency expertsAbout energy efficiency solutions
Recovery is the biggest theme on Halo. Seven entries pull heat or water back out of an exhaust, a vapor stream or a steel plant, and six insulate an existing building. A third group works on the process itself, through microwave intensification, adaptive heat integration and better control. On Halo it spans five groups, including recovering waste heat and water, process intensification and control, and insulation for retrofit.
Stage of development. Work on energy efficiency solutions on Halo is split between university programs and companies. 42% of the solutions are in market. University of Alberta has the most, followed by Michigan State University. Co-development and licensing are the usual partnering routes, and about 31% of the solutions that state terms offer pilot engagements.
Three trends in energy efficiency solutions on Halo
Recovery beats reduction. Seven entries take heat or water back out of a stream that was going to be vented: a transport membrane condenser on exhaust gas, cascade recovery from exhaust steam, a MOF desiccant on industrial waste heat, a hydrogel absorbing eight times its mass inside a steel plant. Nothing about the process changes; the loss is intercepted.
Insulation is a retrofit product. All six insulation entries name existing buildings, and most lead with fire rating and installed thickness before they mention R value. Aerogel appears four times, at R-7 to R-9 per inch with Class A performance. New build specifies insulation by code; retrofit buys it by how little space it takes.
The roof does more than keep rain out. A photonic coating giving 170 watts per square metre of passive cooling, a hydrogel and carbon layer switching behavior with temperature, a biobased coating sprayed by drone at half the labor cost, and lighting optics designed by inverse machine learning. A roof is a large uninstrumented surface, which is why so much lands there.
812organizations
858solutions listed
57%from startups and companies
42%in market
Frequently asked questions
What are energy efficiency solutions?
Energy efficiency solutions covers using less energy for the same output. It spans insulation built for retrofit, recovery of waste heat and water vapor from an industrial stream, roof and cooling surfaces that cut a building's load, process intensification and control on a running plant, and the coatings and sensing that support any of it. Building owners, industrial operators and equipment makers are the buyers.
What are examples of energy efficiency solutions?
Five examples of energy efficiency solutions on Halo include:
- A transport membrane condenser pulling clean hot water out of exhaust gas. (Green Swans)
- Microwave energy applied to intensify a refining process. (Parostok MW)
- Four aerogel product lines, retrofit ready, with fire performance stated. (KrossLinker Pte. Ltd.)
- Photonic cooling giving 170 W per square metre with no power drawn. (SolCold)
- Coatings that last, insulate and reduce CO2 at the same time. (Michigan State University)
Which companies and suppliers are developing energy efficiency solutions?
There are 812 organizations with energy efficiency solutions on Halo, 110 of them universities and research institutions. Among them are Green Swans, City University Hong Kong, and Wageningen University and Research. Most offer co-development or licensing. Sign up to see every organization working in the area and to send them your specific need.
How do I find energy efficiency research partners?
Browsing energy efficiency solutions on Halo is free. Sign up to search the full network and save the ones you want. Post your specific need to get exact matches. Organizations reply directly on the platform.
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