Main Enterprises

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Main Enterprises Main Enterprises is one of Connecticut’s largest major mechanical contracting companies. Oppedisano.

With a skill and a strong conviction for a bright future, Louis Oppedisano set off for America in the early 1900’s, opening his first “tin shop” in Southwestern Connecticut in 1919. The lineage of successes attributed to these character traits has found its way through three generations and almost 100 years to current CEO Kenneth J. By staying ahead of the curve, applying new technologies and refusing complacency, Main Enterprises has emerged as one of Connecticut’s largest major mechanical contracting companies. Our company is much like the product that it sells: a diverse array of moving parts orchestrated to simultaneously produce an intended end result with the utmost efficiency. The benefits of partnering with Main Enterprises include our ability to offer and directly control a myriad of in-house services such as
a 24-hour service department, a sheet metal and mechanical pipe fabrication facility, our design/build engineering staff and an expert installation group. These services are supported by knowledgeable back-office management staff who coordinate and provide world-class customer service.

Maintenance is either planned—or it becomes reactive.PNNL/FEMP benchmarks show that reactive work can represent 40% to 6...
10/14/2026

Maintenance is either planned—or it becomes reactive.

PNNL/FEMP benchmarks show that reactive work can represent 40% to 60% of maintenance activity in a typical program.

Put simply, nearly half—or more—of a facility’s maintenance time or budget may be consumed by responding to problems after equipment has already failed. Best-in-class programs keep reactive work below 10%.*

For facility managers, that can mean fewer emergencies controlling the schedule, less disruption to building operations, and more opportunity to plan repairs before concerns become urgent.

A well-developed maintenance strategy from Main Enterprises creates an opportunity to evaluate how equipment is operating, identify developing concerns, predict future concerns, and make informed repairs before problems interfere with the work happening inside your building.

Main Enterprises, Inc.
Mechanical Exceptionalism Since 1919
📞 203-334-3419
🌐 www.mainhvac.com

*Source: Pacific Northwest National Laboratory/Federal Energy Management Program. Maintenance requirements and program results vary by facility and equipment.

Today, we recognize Energy Efficiency Day and the opportunity to help commercial buildings operate more efficiently, rel...
10/06/2026

Today, we recognize Energy Efficiency Day and the opportunity to help commercial buildings operate more efficiently, reliably, and cost-effectively.

High-efficiency equipment is important, but schedules, setpoints, sensors, airflow, and system controls also shape how a building performs—and how much energy it uses.

According to U.S. Department of Energy guidance, improved HVAC controls may reduce energy costs by 10% to 20% in small and medium-sized commercial buildings.*

For Connecticut facilities, qualifying HVAC equipment and control upgrades may also be eligible for utility rebates, incentives, or financing.

Energy efficiency does not always begin with equipment replacement. It can start with understanding how existing systems are operating and identifying the improvements that make the most sense for the building.

Main Enterprises helps Connecticut facility teams evaluate HVAC performance, uncover opportunities to reduce energy use and operating costs, and develop practical solutions based on their buildings’ needs.

Let’s take a closer look at where your building can perform better together. Call Main Enterprises today!

📞 203-334-3419
🌐 www.mainhvac.com

*Sources: U.S. Department of Energy Better Buildings and Energize Connecticut. Savings and incentive eligibility vary by building, utility, equipment, and project.

The first cold morning shouldn’t be the first time you discover a problem with your heating system.Preventive maintenanc...
09/30/2026

The first cold morning shouldn’t be the first time you discover a problem with your heating system.

Preventive maintenance programs are estimated to save 12%–18% compared with reactive maintenance programs. Simply put, it generally costs less to identify developing issues during a planned visit than to respond after equipment stops performing.

Schedule your fall HVAC maintenance now—or ask Main Enterprises about a preventive maintenance agreement designed to support reliability, reduce unexpected downtime and keep your facility prepared throughout the heating season.

Main Enterprises, Inc. | 203-334-3419 | www.mainhvac.com





Source: Pacific Northwest National Laboratory, O&M Best Practices

Happy National Tradesmen Day!We’re proud to recognize the skilled tradespeople whose expertise, craftsmanship and hard w...
09/18/2026

Happy National Tradesmen Day!

We’re proud to recognize the skilled tradespeople whose expertise, craftsmanship and hard work power Main Enterprises.

Today, we recognize the skilled tradespeople who turn plans into working systems, solve complex problems in the field and keep Connecticut’s facilities operating safely and reliably.

Their work requires knowledge, precision, discipline and pride—qualities that have powered Main Enterprises for more than a century.

To the HVAC technicians, plumbers, pipefitters, sheet metal fabricators, welders and apprentices who carry the trades forward: thank you for your craftsmanship and commitment.

You don’t just perform the work. You build what others depend on.

This Labor Day, Main Enterprises recognizes the hardworking people whose skill, commitment and teamwork keep our company...
09/07/2026

This Labor Day, Main Enterprises recognizes the hardworking people whose skill, commitment and teamwork keep our company—and our communities—moving forward.

To our employees, industry partners and fellow tradespeople: thank you for the work you do every day. We hope you enjoy a safe and well-earned Labor Day.

Happy Labor Day
Main Enterprises, Inc.

Built In-House. Built to Last.A successful HVAC system starts long before installation—it starts right here in our custo...
08/27/2026

Built In-House. Built to Last.

A successful HVAC system starts long before installation—it starts right here in our custom sheet metal fabrication shop.

At Main Enterprises, our skilled craftsmen fabricate ductwork and custom metal components specifically engineered for each project. By producing our own sheet metal products in-house, we're able to control & deliver:

✔ Custom-built solutions designed with a focus on streamlined airflow for every application
✔ Optional duct wrap or lined insulation services
✔ Exceptional quality control from start to finish
✔ Faster project turnaround times
✔ Precision fabrication that ensures a better fit and performance in the field saving installation time

From a single fitting to complex duct systems, our fabrication team takes pride in producing work that meets the highest standards of quality and craftsmanship.

Precision. Quality. Experience. That's the Main difference. Call today for your custom project!

Call today for your custom project!
(203)334-3419
www.mainhvac.com

As schools and institutional facilities return to full occupancy, HVAC performance affects more than temperature. Airflo...
08/17/2026

As schools and institutional facilities return to full occupancy, HVAC performance affects more than temperature. Airflow, filtration, ventilation, controls and equipment reliability all contribute to a comfortable, functional indoor environment.

Now is the time to confirm that systems are operating as intended—not after occupants begin reporting problems. Main Enterprises provides commercial HVAC and plumbing support for facilities throughout Connecticut.

Get back-to-school ready today!
203-334-3419
www.mainhvac.com

When temperatures climb, commercial cooling systems are put to the test. Small issues—restricted airflow, worn component...
08/11/2026

When temperatures climb, commercial cooling systems are put to the test. Small issues—restricted airflow, worn components, clogged coils or control problems—can quickly become major disruptions when equipment is operating at peak demand.

Main Enterprises helps commercial and institutional facilities identify problems early, restore performance and keep critical systems operating when they are needed most. We can even predict equipment failures with our Predictive Maintenance services.

Don’t wait for a complete shutdown to investigate a change in comfort or performance. Contact Main Enterprises to discuss your facility’s needs.

Call Today!
203-334-3419
www.mainhvac.com

We’re Hiring: Director of ServiceMain Enterprises is seeking an experienced leader to oversee and strengthen our commerc...
08/07/2026

We’re Hiring: Director of Service

Main Enterprises is seeking an experienced leader to oversee and strengthen our commercial HVAC service operations.

This is an opportunity to lead a skilled service team, improve department performance, support strong customer relationships, and help shape the continued growth of a company that has served Connecticut businesses, institutions, and communities for more than 100 years.

The ideal candidate brings commercial HVAC service experience, strong operational judgment, and the ability to develop people while maintaining high standards for responsiveness, accountability, and customer care.

If you’re ready to lead an established service department and make a meaningful impact, we’d like to hear from you.

Learn more and apply:
Director of Service – Main Enterprises
www.mainhvac.com/careers

The Main Enterprises HVAC & Plumbing industry BBQ was a success!!! 🤝 Hands were shaken.💼 Deals were made.👷 New opportuni...
07/20/2026

The Main Enterprises HVAC & Plumbing industry BBQ was a success!!!

🤝 Hands were shaken.
💼 Deals were made.
👷 New opportunities were discovered.
🔄 Old colleagues reconnected.
🎁 Prizes were won.
🍔 Great food was shared.
🎸 Music filled the afternoon.
🥾 Boots were fitted.
🔧 Tools found new owners.
🏢 Our doors were opened.
💬 New conversations began.

Most importantly... Relationships were built.

Thank you to everyone who joined us for the Main Enterprises Industry BBQ. It was a pleasure welcoming employees, customers, vendor partners, manufacturers, students, friends, and members of the HVAC & Plumbing community for an afternoon of connection, conversation, and community.

For more than 100 years, Main Enterprises has believed that the strongest companies are built on more than projects—they're built on relationships.

Thank you for being part of ours.

Address

1180 Stratford Road
Stratford, CT
06615

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