Ab & Co.
Industrial Boilers and Process Air Heat Exchangers
http://www.abco.dk/

Heat Exchange Systems, Ltd.
Heating, & Carrier Air Conditioning from Heat Exchange Systems, Denver, Colorado. Caring For Your Environment with Quality Heating and Air Conditioning Systems and with Our Recycling Program!
http://heatexchange.com

Heatran
Korea. Specializes in design of heat transfer equipment and related systems, including heat exchangers, heat recovery steam generators, waste heat boilers, economizers, condensers, heaters, and coolers.
http://www.heatran.com/

Heat Transfer Systems Inc.
Designs and manufactures broad range of thermal processing products. Includes heat exchangers, heat recovery boilers, and waste heat recovery units. Service include repairs, replacements, and modifications of existing equipment.
http://www.heattransfersys.com

Transparent Energy Systems Pvt Ltd
Provides and develops Heat Recovery Systems for harnessing all types of waste heat, originating from various fuels and from different industrial sources and process systems.
http://www.heatrecovery-system.com

Envirosep
EnviroSep (based in Georgetown, SC USA) designs and manufactures pumps & complete integrated solutions for fluid handling, heat transfer and energy recovery. Capabilities range from small, standardized pumping equipment packages to complex, engineered systems
http://www.envirosep.com/

National Heat Exchange Cleaning Corp.
National Heat Exchange markets a newly patented technology for cleaning the shell-side of heat exchangers and coolers, restoring their peak efficiency.
http://www.nationalheatexchange.com

Heat Exchange Applied Technology
Quality Finned Tube products for Heat Exchangers, Boilers, HVAC, Economizers and Fin Fan Cooelrs.
http://www.heat-voss.com

Therma-Stor Products
Manufacturer of free-standing dehumidifiers, ducted/installed dehumidifiers, commercial dehumidifiers, ventilation systems, heat recovery water heaters, restoration equipment (including dehumidifiers, air movers, meters, & instruments) & more.
http://www.thermastor.com/

Heat-Line
Eliminate water lines and pipe freezing with Heatline frozen water pipe protection. Energy efficient internal & external water line applications and cable heat trace systems.
http://www.heatline.com/index.htm