K-12 Education

Hoosac Valley Middle-High School (LEED-Gold)

HEA provided mechanical, plumbing and fire protection design for the complete replacement of building systems associated with a full-building renovation/addition project for a 170,000 SF school. The project included on-site renewable energy generation as well as a variety of high-efficiency HVAC, plumbing and electrical systems.

HVAC design included new high-efficiency condensing boilers, valves, pumps, variable frequency drives, energy recovery ventilators, chilled water equipment, exhaust systems, piping, and ancillary equipment as well as new controls and a new building management system. The commercial kitchen included exhaust, make-up air and DWV systems including a grease trap, etc. HEA provided the necessary building information modeling services to support the LEED certification effort.

The project also included a 500kW photovoltaic array, daylight and rainwater harvesting, energy recovery, outdoor air measurement, and demand control ventilation, low-flow plumbing fixtures and an NFPA 13-compliant fire protection system.

Historic Colegrove Park Elementary School (LEED-Gold)

HEA designed the mechanical, electrical, plumbing and fire protection systems associated with the complete renovation of this 78,000 SF 19th century historic school. The building had been closed since 2010; it was re-opened in time to welcome students back in January 2016.

The new HVAC system that serves the majority of the building consists of features energy recovery ventilators (ERVs) that include 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 provides supplemental heat.

Interior lighting is provided by high performance LED lights. Occupancy sensors control the fixtures. A power distribution and emergency power system was 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.

Plains Elementary School (LEED-Silver)

HEA was retained to design the mechanical, plumbing and fire protection systems associated with this new 65,000 SF elementary school. The building includes classrooms and other teaching spaces (art, music, and speech), two cafeterias, a kitchen, a 2-story gym, and administrative offices and support spaces.

Ventilation and air conditioning are provided by seven energy recovery ventilators (ERVs). Conditioned air is distributed to zone VAV boxes, and passed through diffusers for use as a displacement ventilation system. Heating is provided by a combination of hot water perimeter fin-tube radiators, radiant panels, and/or in-floor radiant heating. The kitchen’s HVAC needs are provided by a high-efficiency variable refrigerant flow (VRF) system. The Captiveaire kitchen system includes commercial-grade hoods, an adjustable-speed heating-only makeup air unit, and a pair of variable speed exhaust fans.

Fire protection includes complete wet-sprinkler coverage in accordance with NFPA 13.

Granby Elementary School (LEED-Gold)

HEA recently designed the mechanical, plumbing and fire protection systems associated with major renovations to a 37,030 SF elementary school as well as the construction of a new 31,730 SF addition to the school. The northern half of the project includes the renovated building, which contains classrooms and teaching spaces, a cafeteria and a kitchen. The southern half includes the entire addition, which contains administrative spaces, a gym, and classrooms.

The addition is ventilated by energy recovery ventilators, while the renovation is served by air handling units and dedicated outdoor units. Space cooling for the majority of the building is provided by the ERVs and AHUs. Air from the AHUs is distributed to zoned variable air volume (VAV) boxes. Two variable refrigerant flow (VRF) systems serve the spaces served by the dedicated outdoor units.

Space heating is provided radiant heat panels and fin-tube radiators, supplemented in select areas by reheat coils in VAV boxes. The main glycol / hot water loop associated with this equipment is served by a new boiler plant consisting of two dual-fuel boilers and one LP-fired condensing boiler.

Domestic hot water is provided by two gas-fired 600 MBH condensing water heaters with peak efficiencies of 96%. Low-flow plumbing fixtures were specified throughout the building to achieve the project’s water use reduction targets.