E.M. Duggan is a fifth generation, family-owned business long respected for expertise in plumbing, HVAC, and fire protection. With a bonding capacity of up to $850 million, we have the ability to secure projects of any size and scope. Backed by over 128 years of experience and quality craftsmanship, we complete all of our jobs safely, correctly, on time, and with pride. We firmly believe that our client relationships are as important as our mechanical services. At E.M. Duggan we don’t just build mechanical systems, we build lasting relationships.