Heliocentric is an energy and environmental engineering firm that provides technical assistance, consulting services, and systems solutions to owners, architects, builders and engineers. We specialize in the engineering and design of high performance buildings and communities, passive buildings, net-zero homes, and sustainable whole-building energy solutions.Heliocentric provides multi-disciplinary engineering expertise to achieve your energy and environmental goals. A building is a complicated system — Heliocentric synergistically weaves together the pieces of that system to make your project successful and affordable.  Passive solar, passive house & energy-efficient design Photovoltaic, solar and wind energy systems Green HVAC systems Building science and environmental engineering Energy audits and efficiency retrofits.