Historic Colegrove Park Elementary School (LEED-Gold)

HEA designed the mechanical, electrical, plumbing and fire protection systems associated with the complete renovation of a 78,000-sf, 19th century historic school building in North Adams, MA. The total construction cost approached $30M. The building had been closed for six years prior to the renovation and subsequent re-opening.  

The new HVAC system that serves most of the building features energy recovery ventilators (ERVs) equipped with DX cooling coils, glycol/HW heating coils, energy recovery wheels, and variable speed supply and exhaust fans. The ERVs supply room-neutral air to zone VAV boxes throughout the building. A high-efficiency Variable Refrigerant Flow (VRF) system heats or cools the air before it is delivered to occupied spaces. 

A hydronic heating system was included to provide supplemental heat. Two condensing boilers with rated peak efficiencies of 95% serve the hydronic equipment via a distribution system that includes variable speed distribution pumps. 

A Captiveaire system is included in the kitchen. It includes commercial-grade hoods, an adjustable-speed heating-only makeup air unit, and a pair of variable speed exhaust fans. The hood fans are modulated by an advanced flow control system that will vary airflow rates based on temperature, smoke, and effluent levels.

Interior lighting is provided by high performance LED light fixtures, controlled by occupancy sensors. Fixtures in spaces with daylight exposure are installed with dimmable ballasts and controlled with daylighting sensors to modulate light output based on natural light levels. Power distribution and emergency power systems were designed for the renovated building, as well as a state-of-the-art fire alarm system with voice activation. Fire protection includes complete wet-sprinkler coverage in accordance with NFPA 13.

The project achieved LEED^TM-Gold status from the US Green Building Council.