Green House Holdings, Inc., through its subsidiary, R Squared Contracting, Inc., provides energy efficiency products and technologies to the residential, commercial, and industrial building markets. The company also offers ethanol fuel and ethanol production technologies to residential, corporate, and government customers. In addition, it distributes E-Fuel MicroFueler, as well as ethanol production systems to produce ethanol using sugar, algae or waste from distilleries and breweries. Further, the company operates an aquaponic, vegetable, and fish farm for residential customers, and the food and restaurant industry. It supplies its products through outsourced manufacturers and assembly from third-party subcontractors. The company was founded in 2007 and is headquartered in San Diego, California.