Multiple prime delivery system on a University chemistry lab and science bldg renovation and addition. During the pre-design phase, University communicated chemical use and exhaust requirements for 2 cutting edge research professors. The HVAC ductwork designed by the MEP engineer does not contain stainless steel coating and smooth connection joints, which lead to premature corrosion and a combustion hazard due to build-up of chemicals at duct connections. Entire lab is shut down for almost 1 year to perform retrofit. University asserts a claim against design team for increased construction costs, delay, re-design costs, cost for renting alternate lab facilities and the lost productivity value of the 2 professors. Asserted value of claim (less betterment) exceeded available design professional insurance.