The CharityWorks GreenHouse is an embassy of green design to the public. The house showcases how energy efficient design and renewable energy systems come together in a home that is both environmentally friendly and a beautiful place to live. The site of the home was selected because of its walkable proximity to the amenities of McLean and its access to the Metro bus system; the house is less than a five minute walk to the grocery store, pharmacy, restaurants, and numerous other shops in McLean. The house includes approximately 4,900 square feet, and has a geothermal system for heating and cooling, a solar hot water system, and photovoltaic panels to generate on site electricity. The design and site plan have been subjected to extensive energy modeling to position the house on the site and to incorporate architectural elements which maximize thermal efficiencies.