Mechanical systems are the backstage elements of a building's design. They provide the infrastructure that makes a building functional. Their salient points--efficiency, reliability, quietness--describe a supporting player. But their importance is inversely proportional to their prominence. What you want in mechanical systems is reliable, cost-effective performance. Heating and cooling systems that deliver when called upon. Ductwork that supports smooth operation of your HVAC system. Plumbing and process piping that reliably deliver needed services.