Grothouse Expands with a second Eco-Friendly Facility. The new 12,000 square-foot facility was designed by owner Paul Grothouse using a range of energy efficient materials and systems. From its highly insulated construction techniques to a heating system powered by scrap materials, nearly every aspect of the new facility has been designed using energy conserving techniques. Integrated solar panels generate 30% of the electricity needs, the equivalent of providing a day’s worth of power for thousands of homes.