The project: IMEG provided mechanical, plumbing, fire protection, and energy modeling design services for the historic renovation of Crosby Hall, home to the University at Buffalo’s School of Architecture and Planning.

The goal: The design aimed to meet the State University Construction Fund (SUCF) Directive 1B-2 Deep Energy Retrofit Target and achieve LEED Gold Certification by implementing energy-efficient and sustainable building solutions.

Design approach: IMEG developed and partially designed an innovative mechanical system that aligned with the SUCF 1B-2 directive while supporting full building electrification. The proposed system utilized water-source heat pumps connected to the existing campus chilled water loop, eliminating the need for steam heating.

To determine the most effective mechanical system, IMEG analyzed three potential options:

  • Variable Air Volume with Reheat (VAV-RH): Estimated operating EUI of 41.0 kBtu/sf-yr.
  • Water-Loop Heat Pumps (WLHP): Achieved the lowest EUI of 25.7 kBtu/sf-yr, offering an all-electric solution using the campus chilled water plant.
  • Fan Coil Units (FCU): Achieved an EUI of 33.5 kBtu/sf-yr, utilizing both the existing steam and chilled water plants.

A whole-building energy analysis considered upgrades to the building envelope, enhanced lighting and controls, and low-flow fixtures.

Key Design Features:

  • Mechanical Systems: Complete replacement of HVAC equipment, ductwork, and piping, with DDC controls integrated into the campus Building Management System.
  • Plumbing & Fire Protection:
    • New domestic water and sanitary distribution piping.
    • Installation of a new domestic hot water system.
    • An automatic sprinkler system added to all floors above the basement.
  • Water Mitigation: A new exterior perimeter drainage system was implemented to address water infiltration issues in the basement

The outcome: IMEG’s design provided an energy-efficient, cost-effective solution that modernized Crosby Hall while preserving its historic character. By leveraging existing campus infrastructure, the project met deep energy retrofit targets, significantly reduced energy usage, and positioned the building for a sustainable, electrified future.