| EARTH TO AIR, LLC Patent applications |
| Patent application number | Title | Published |
|---|
| 20090120606 | Double DX Hydronic System - A double DX hydronic heating/cooling system includes a primary DX system for maintaining a primary interior fluid loop at a desired temperature range. Secondary DX sub-systems are operatively coupled to the primary interior fluid loop and are operable in either a heating mode or a cooling mode to provide independent control of interior air temperature in different spaces. Each sub-system includes a dedicated water pump to minimize power requirements for the system. | 05-14-2009 |
| 20090120120 | DX System with Filtered Suction Line, Low Superheat, and Oil Provisions - A heating/cooling system has improved operating efficiencies due to low superheat provisions and a specially configured compressor oil return. For certain systems, such as direct exchange geothermal heating/cooling applications having sub-surface heat exchanges extending at least 100 feet below the surface and using R-410A refrigerant, a specific compressor oil may be used to further improve efficiency. | 05-14-2009 |
