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50+ Years
experience
Emergency
services
Trusted HVAC Services in Stratford, Connecticut
Main Enterprises has been a leader in HVAC services since 1919, combining modern technology with time-tested values to deliver exceptional cooling and heating solutions. Our comprehensive offerings include 24-hour emergency services, preventative maintenance, equipment replacements, and custom duct fabrication, supported by state-of-the-art equipment and highly trained technicians. With three generations of expertise and a 25,000-square-foot fabrication facility, we serve commercial, municipal, and institutional clients across Connecticut. Our in-house engineers and estimators prioritize efficient, cost-effective design practices while maintaining a commitment to ethical standards and customer satisfaction. Over 100 years of experience ensures we provide reliable, code-compliant solutions for projects of all sizes, from small repairs to large-scale system overhauls.

We emphasize proactive maintenance through advanced technologies like remote monitoring to minimize downtime and extend equipment lifespan. Our team of licensed professionals delivers tailored service plans, including quarterly, biannual, and custom maintenance agreements, ensuring optimal system performance year-round. As a fully insured, locally owned business, we pride ourselves on rapid response times, transparent communication, and long-term partnerships built on trust and technical excellence. From CAD design to installation and ongoing support, Main Enterprises remains Connecticut's go-to resource for comprehensive HVAC and plumbing needs.
Services
HVAC Repair Preventative Maintenance Duct Fabrication System Replacements Emergency Services CAD Design Plumbing Services Remote Monitoring Commercial Installations Maintenance Plans
Details
  • Year established: 1919
Highlights and features
  • We offer 24/7 emergency HVAC services with rapid response times
  • Our 25,000 sq ft fabrication facility handles projects of all sizes
  • 100+ years of combined experience in commercial HVAC systems
  • In-house engineers provide cost-effective design/build solutions
  • We implement remote monitoring technology for proactive maintenance
What people say
24/7 emergency reliability Technical expertise Century-long commitment Rapid response times Custom fabrication
Services
HVAC Repair
Our licensed technicians provide rapid HVAC repair services for commercial systems including air conditioners, boilers, and chillers. With 24/7 emergency availability and state-certified expertise, we minimize downtime through efficient diagnostics and same-day repairs. Our team handles all brands and system types, from rooftop units to complex industrial installations.
Preventative Maintenance
Customizable maintenance plans ensure optimal HVAC performance year-round. Options include quarterly, biannual, and monthly inspections covering filter changes, system checks, and efficiency optimization. These programs extend equipment lifespan, maintain warranties, and prevent unexpected failures through proactive care.
Duct Fabrication
Our 25,000 sq ft fabrication facility produces precision duct systems using high-speed machinery. We create custom solutions for commercial projects of all sizes, offering next-day delivery and installation. Services include design, manufacturing, and on-site assembly of HVAC ductwork and fittings.
System Replacements
Specialized replacement services for HVAC components including chillers, cooling towers, and rooftop units. Our design/build team handles full system overhauls, ensuring proper sizing and energy-efficient installations. We provide CAD modeling for seamless integration with existing infrastructure.
Remote Monitoring
Advanced DST remote monitoring systems track HVAC performance in real-time. This technology enables predictive maintenance by analyzing sound data to identify potential failures before they occur. Reduces unplanned downtime and maintenance costs for mission-critical equipment.
People
Kenneth J. Oppedisano
CEO
Third-generation leader with over 30 years in HVAC contracting. Oversees operations and strategic growth while maintaining family commitment to ethical business practices and technical excellence.
Questions
What HVAC services do you offer?
We provide full-service HVAC solutions including emergency repairs, preventative maintenance, system replacements, duct fabrication, and remote monitoring for commercial clients.
Are you available for emergencies after hours?
Yes, our 24/7 emergency service responds to HVAC crises at any time, with technicians on call 365 days a year.
Do you service all types of HVAC equipment?
Our licensed technicians work with all brands and system types, including boilers, chillers, rooftop units, and industrial HVAC systems.
What maintenance plans are available?
We offer quarterly, biannual, monthly, and custom maintenance plans tailored to your system's requirements and operational schedule.
Do you provide fabrication services for contractors?
Yes, our 25,000 sq ft facility offers custom ductwork manufacturing and next-day delivery for HVAC contractors across Connecticut.
How do you handle large-scale projects?
Our in-house engineers and estimators manage complex projects from design through installation, utilizing CAD systems for precise, efficient implementations.