The Iowa Department of Transportation is seeking competitive bids for the Sioux City Mat Lab HVAC updates. The project involves removing and replacing make-up air units, exhaust fans, and motorized dampers, as well as adding new exhaust hoods and spray foam insulation. The contractor will be responsible for ensuring that all work is completed according to the approved design and under the direct supervision of the Iowa DOT. • The project requires the removal and replacement of 5 exhaust fans and revised controls for negative lab pressurization requirements. • The contractor must add a new exhaust fan for negative lab pressurization requirements. • The project involves the replacement of 3 VAV boxes to allow for additional heating capacity. • The contractor must make building envelope modifications to add spray foam insulation above the ceiling between the loading dock and HMA lab.