ENTEC Services, Inc. proudly offers top-quality commercial HVAC building solutions with customer service to match. ENTEC has been engineering innovative building solutions throughout the Midwest since 1981. Serving Illinois, Missouri, and Iowa, with facilities in Peoria, Springfield, and Mattoon, Illinois. We specialize in a number of cutting-edge technologies, such as retro-commissioning, building performance analytics and energy solutions that are unmatched by other service providers. We strive for creative, reliable solutions. At ENTEC, we not only help you invest in your business but also form a valuable partnership based on quality and trust.