Breen & Sullivan Mechanical Services, Inc
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About Breen & Sullivan Mechanical Services, Inc
Breen & Sullivan Mechanical Services, Inc. operates as a privately held HVAC contractor in Wilmington, Massachusetts, serving the greater Boston metropolitan area. The company holds a strong local reputation backed by 28 customer reviews averaging 3.7 stars, reflecting both praise for technical expertise and occasional criticism around service timing. Their team specializes in designing, engineering, and installing complete comfort systems for both residential homeowners and commercial building owners across Wilmington, Burlington, Andover, and surrounding Middlesex County communities. The business maintains standard weekday hours from 8 AM to 4:30 PM, Monday through Friday, and offers call-ahead scheduling for appointments.
What distinguishes Breen & Sullivan from typical HVAC contractors is their multi-trade capability and recent strategic partnership with ENCON Commercial Services, which expanded their service offerings and resource availability. The company operates under one unified team capable of handling HVAC, electrical, plumbing, and generator installation, allowing customers to manage multiple building systems through a single point of contact. Their technicians serve diverse industries including healthcare facilities, educational institutions, mission critical data centers, and research and development properties, demonstrating experience with specialized commercial environments beyond standard residential work.
Customer reviews highlight specific technicians who delivered solution-oriented service. Timothy received recognition for identifying an unconnected dryer vent during a routine HVAC inspection, a potential fire hazard he promptly addressed by coordinating with the company's sheet metal division. John from the sheet metal team subsequently resolved the venting issue in a cramped residential attic. Gustavo, referred to as "Gustavo" in reviews, fixed an AC refrigerant leak and installed a new thermostat, with customers describing him as hardworking, honest, and meticulous about workspace cleanliness. These named references demonstrate the company's capacity for responsive, specialized residential service amid their broader commercial portfolio.
What Customers Say
Three of five detailed reviews award five stars, with one negative review citing reckless highway driving by an employee and another mentioning above-market pricing. Positive feedback consistently praises specific technicians by name, same-day response capability, and the ability to handle multiple trades through one service call.
Working Hours
| SundayToday | Closed |
| Monday | 8 AM–4:30 PM |
| Tuesday | 8 AM–4:30 PM |
| Wednesday | 8 AM–4:30 PM |
| Thursday | 8 AM–4:30 PM |
| Friday | 8 AM–4:30 PM |
| Saturday | Closed |
Services
New HVAC System Installation
Design, engineering, and installation of complete heating and cooling systems for existing homes and commercial buildings.
AC Repair & Maintenance
System diagnostics, refrigerant leak repair, thermostat installation, and seasonal tune-up services.
Heating System Services
Installation and repair of heating Equipment for residential and commercial properties.
Electrical Services
Panel upgrades, wiring, lighting installation, and electrical repairs for residential and commercial clients.
Plumbing Services
Water heater installation, pipe repair, and general plumbing maintenance and installation.
Generator Installation
Sales and installation of backup power generators for residential and commercial properties.
Commercial HVAC Maintenance
Ongoing maintenance contracts for commercial, industrial, and mission critical facility systems.