UltimateAir® Manufactures And Sells Products Which Improve Indoor Air Quality And Are Energy Conscientious And Environmentally Friendly. In 1989, Stirling Technology Developed Our Patented Rotary Core Heat Exchanger Based On Their Work With Stirling Engines, A Technology Invented In 1816. Their Goal Was To Develop A System Which Has Outstanding Performance And Used Remarkably Little Energy. From This, The RecoupAerator® Was Born. UltimateAir Is Now The Exclusive Manufacturer For This Technology In The Americas And Europe.