For more than 25 years, MB Mechanical Contractors Inc. (Maine Boiler) has been New England's leading design/build, mechanical contractor with expertise in the commercial and industrial boiler fields. We offer excellence and superiority in the mechanical industry and are unsurpassed with code certifications, delivering the most complex full service mechanical expertise.

MB Mechanical is a Portland, Maine-based company that has consistently met our customer's needs since 1985. The vast experience of our field staff, combined with the varied specialties of our in-house engineering staff, sets us apart from our competition. We provide a wide range of commercial, institutional and industrial mechanical services throughout New England.
As today's technology has advanced, so have MB’s capabilities. We have established long standing and successful project-based relationships with many well known Maine and New England based companies. Our customers include Bowdoin College, Calpine, Evonik Cyro, Maine General Hospital and the University of Southern Maine.

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• Boiler installation, repair & alteration
• Pressure vessel fabrication & repair
• Fuel conversion & process equipment
• Pipe fabrication in field or shop

Listed below are our ASME and NBIC certificates:

• National Board "R" Certification #2500:
Repairs and alterations to ASME boilers and pressure vessels
• ASME "H" Certification #29,786:
Design and build ASME heating boilers
• ASME "S" (PP) Certification #29,787:
Design and build ASME high pressure power boilers and boiler power piping systems
• ASME "U" Certification #25,858:
Design and build ASME unfired pressure vessels and heat exchangers