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M&O Corporation has been proudly serving commercial customers in Connecticut and adjacent NY Area since 1976. We serve commercial office, medical, government, data centers, educational, manufacturing and all other types of commercial, industrial and institutional facilities providing the best HVAC maintenance, repairs and new installation services in the industry with a team of around 45 individuals. 


We have consistently defined our core values as honesty, integrity and respect for the company's employees and customers. Our mission statement is the same today as it was our first day of operation:  Provide a safe work environment where our employees are treated as family, with honesty, integrity and respect and convey these values to our customers through partnership in construction and service projects that provide the highest quality and value, greatest return on investment and evolve into long term working relationships.  We don't aspire to be the largest, but we aspire to be the best at what we do!

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