Merrimack College – Andover, MA

Merrimack College is a smaller college in North Andover, Massachusetts. It was founded in 1942 with its initial goal being to educate WW II veterans after they returned home from war. Preferred Mechanical, having completed previous projects such as an ice rink and athletic complex for the college, was contracted on a design build basis to engineer and install a HVAC system for a new three story classroom building. The systems installed are primarily variable air volume terminals with rooftop units, supplemented by ductless split systems in critical environments. A digital control system incorporates motion/occupancy sensing, as well a building pressure and CO2 demand control ventilation to ensure the building operates at peak efficiency.

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Thayer Academy – Braintree, MA

An independent, coeducational day school for grades 5-12 since 1877, Thayer Academy is situated close to Boston and educates some of the brightest minds of tomorrow. Preferred Mechanical recently completed a new athletic complex that houses a one and a half sheet ice arena, as well as a fieldhouse for tennis and basketball. Preferred installed the modular chiller system for the ice rinks, which also maximizes heat reclaim via radiant heating and ventilation air in the locker room spaces. There are multiple HVAC systems within the facility, including standard constant volume rooftop units, split systems, heating and ventilating units, and a small kitchen ventilation system. In addition to the mechanical systems, Preferred installed a hybrid control system including a digital system for the ice rink with remote alarming, and standalone thermostats on the packaged HVAC equipment.

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Andover Academy – Andover, MA

Andover Academy is one of the premier college prep schools in the country. Young men and women come from all over the world to learn on the historic campus in Andover, Massachusetts from some of the leading educators in their field. Preferred Mechanical assisted Andover Academy in the replacement of their aging ammonia refrigeration system for their two ice rinks with a modular chiller system that provides both reclaim heating and air conditioning for the facility. During the refrigeration system replacement, Preferred also constructed the 100,000+ sq. Ft athletic complex that adjoins the neighboring fields. Working closely with in house and subcontracted control contractors, the same refrigeration system within the ice arenas provides cooling and heating for the athletic complex throughout the academic year and for all summer programs in both facilities.

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