Temple University – Engineering Services

Precis was tasked with several air-handling unit (AHU) upgrades across the Temple University campus in Philadelphia, Pennsylvania.

In Mitten Hall, Precis designed the replacement of two individual air-handling units (AHU-4 and AHU-5) with a semi-custom 10,000-CFM AHU located in an existing first-floor mechanical room with a new modular indoor central station air handler with direct digital controls (DDC). The Siemens Building Automation System (BAS) serving the area was upgraded to full BACnet compliance. New ductwork was provided within the mechanical room and transitioned up to the newly installed air distribution system. The unused and abandoned mechanical and electrical equipment was removed and a new caged area, in place of AHU-5, was provided to contain custodial equipment, supplies, and a new utility sink.

In the New Dental School, Precis designed the replacement of a single air-handling unit (AHU-1) with a roof-mounted, custom outdoor central AHU with approximately 160K cubic feet/minute (CFM) per deck and service corridors. The new AHU includes glycol preheat coils fully capable of supporting the load without energy recovery. A steam-to-glycol heating package was designed, with the glycol used for any unit heaters within the air handler. The scope included new DDC HVAC controls and integration into the existing facility management system (IFMS).

In Gladfelter Hall, 10 individual air-conditioning (AC) units serving the second through 11th floors were replaced with a single rooftop-mounted AHU in the previous location of the cooling towers. It contained a custom 100K CFM outdoor central station AHU with service corridors. The mechanical rooms containing the AC units function as ductwork and pipe chases to serve the core areas of those floors.