CC
Green Swans · Startup
A transport membrane condenser pulling clean hot water out of exhaust gas.
In-development
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Receive a weekly email digest of the latest energy efficiency solutions added by the network.Browse 1,059 solutions in energy efficiency solutions on the Halo network
Updated Nov 2, 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
CC
WW
City University Hong Kong
Cascade recovery from exhaust steam, driven by the waste heat itself.
Early-stage
Matt Grandbois
AirJoule, LLC · Startup
A MOF desiccant recovering water vapor on industrial waste heat.
In-development
Process intensification and control
Evgeniy Vasiliev
Parostok MW · Startup
Microwave energy applied to intensify a refining process.
Co-developmentIn-development
Andrew Watson
Land Level Excavating · Supplier
An inline fluid conditioning manifold retrofitted into a cooling loop.
LicensingIn-development
PK
University of Pittsburgh
Stand-off Raman reading oxygen concentration in a hot gas stream.
In-development
Insulation for retrofit
GN
KrossLinker Pte. Ltd. · Startup
Four aerogel product lines, retrofit ready, with fire performance stated.
Co-developmentIn-development
Omar Basha
Re-Du Company · Startup
Silica aerogel with graphene-doped polymer, Class A fire, built for retrofit.
In-development
RE
Liatris Inc · Supplier
Cellulose nanofibers in exfoliated clay, reaching R-9 per inch.
Sponsored researchIn-development
Roof and cooling surfaces
SB
SolCold · Startup
Photonic cooling giving 170 W per square metre with no power drawn.
In-development
Lihong Lao
Syracuse University
A carbon layer and a PNIPAM hydrogel switching a roof's behavior with temperature.
In-development
Coatings and systems that cut load
PK
Michigan State University
Coatings that last, insulate and reduce CO2 at the same time.
In-development
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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 comes mostly from companies. 45% 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 29% 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.
987organizations
1,059solutions listed
62%from startups and companies
45%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 987 organizations with energy efficiency solutions on Halo, 133 of them universities and research institutions. Among them are Green Swans, City University Hong Kong, and AirJoule, LLC. 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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