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EARTH TO AIR SYSTEMS, LLC
FRANKLIN, TN US
1. 20090272137 Oil Return, Superheat and Insulation Design 11-05-20092. 20090260378 DX System Heat to Cool Valves and Line Insulation 10-22-2009
3. 20090133424 Direct Exchange System Design Improvements 05-28-2009
4. 20090095442 Advanced DX System Design Improvements - direct exchange geothermal heating/cooling system has a self-adjusting expansion valve and a bypass flow path 04-16-2009
5. 20090065173 Direct exchange heating/cooling system - includes a specially designed supplemental air-source heat exchanger 03-12-2009