Welcome to TESS

As an engineering consulting company specializing in the modeling and analysis of innovative energy systems and buildings, we have worked hard to achieve a reputation of providing clients with fast, honest, accurate assessments of complex problems. A recognized leader in the energy-modeling and simulation field, we routinely tackle projects that include renewable energy systems, HVAC systems, natural ventilation, solar district heating systems, sustainable buildings (green, LEED™), hydrogen power, cogeneration systems, and much more. Working closely with national labs, commercial companies, research organizations, utilities, non-profits, architects, and universities, our strength lies in a solid understanding of the physical processes governing energy systems and in applying that understanding to flexible, powerful software tools such as TRNSYS.

Take a minute to look around and learn more about us. We'd love to hear about your ideas and projects and find ways that we can work together to meet your needs.