H.T. Lyons is a full-service mechanical contractor. Your single source for engineering, construction, energy services, building controls, commissioning, balancing and preventive maintenance. By self-performing this comprehensive list of services, we are able to offer our clients the highest quality and most streamlined and cost-effective building services in the industry. Our decades-long track record of quality work translates into repeat customers and an unmatched reputation for high quality engineering and construction services throughout Pennsylvania, New Jersey and New York.