PETER SPELLMAN ARCHITECTURE (PSA) is a leader in the application of sustainable design principles and strategies. PSA offers several green architectural services including smart, cost-effective design solutions, the latest green products and technologies, energy modeling, zero net energy design as well as LEED certification coordination. PSA excels at creating buildings that maximize nature’s energy (wind, solar, geothermal), use earth-friendly materials, and provide comfort and great design at costs comparable to lower-performing conventional buildings.