McDonough HS HVAC Systemic Renovation

BKM served as the prime consultant on the McDonough High School HVAC System Renovation project. This school is a 175,000 SF, three story building that was built in 1977. The existing HVAC system consisted of a four-pipe chilled/heating water system serving air handling units throughout the building.

Under this project, sixteen (16) air handlings units that were original to the building were replaced. The majority of the units were located in the mechanical penthouses while a few were relocated to the roof to allow for adequate clearances. Calculations were performed to ensure code compliant outdoor air flow rates were being met. In addition, all existing VAV terminals were replaced and new heating water piping was extended to each VAV terminal since the existing units did not include reheat coils. The existing VAV zones were evaluated and modified to ensure each classroom had individual room control. Additionally heating water pumps, chilled water pumps, condenser water pumps and all associated piping throughout the entire building were replaced.

All existing controls in the building were original to the building and were pneumatic. This project allowed the controls to be updated to DDC controls with electric actuation. All new valves, dampers temperature sensors etc. that were replaced and integrated into the CCPS central automation system.

Phasing considerations were a very important part to this project as a Performing Arts Addition & Renovation project had just begun at the school (also designed by BKM) and the construction timelines overlapped. Several phasing discussions occurred throughout the project with CCPS to ensure that there would be minimal disruptions between the projects. An in-depth phasing plan was developed based on this discussion to clearly outline the scheduling between the two projects. In addition to the constructability and coordination with the other project, phasing guidelines considered when funding was available to the school. This succeeded and made the construction phase of the project to go very smoothly.