Hvac design-build (D-B) firms can be in a unique position to begin the record-drawing process in the conceptual phase of an infrastructure system upgrade, if they can break old habits. It requires a huge leap of faith from the traditional engineering and construction mentality to the "single-source solution" manner of thinking.
This culture change will be one of the biggest hurdles for D-B firms to overcome. To date, there have been very few hvac companies to make that change.