General InfoJ.M. Brennan, founded in 1932, is a mechanical contracting firm that serves the southeastern Wisconsin area. It provides design and installation of boilers, chillers, air handling units, exhausts, ventilators, sanitary sewers, water treatment plants and heat recovery systems. The company also provides piping services for food grade, refrigeration, industrial gas, underground and compressed air applications. It provides services through a team of designers, engineers, steam and refrigeration fitters and sheet metal workers. The company is family-owned and managed and utilizes a variety of equipment, including backhoes and dump trucks. J.M. Brennan also provides round-the-clock repair and maintenance services and maintains its office in Milwaukee.BBB RatingA+

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Regular Hours

Extra Phones

Phone: (414) 342-3209

TollFree: (888) 560-6041


  • Heating
  • Air Conditioning
  • Service & Repair
  • Installation

Payment methodCash OnlyNeighborhoodMenomonee River ValleyAKA

Brennan, J M

J.M. Brennan Inc.

Brennan, J M – J M Brennan

J.M. Brennan, Inc.

Brennan Jm

Brennan JM

Other Link


CategoriesBuilding Contractors-Commercial & Industrial, Controls, Control Systems & Regulators, Furnaces-Heating, Water Heaters, Sheet Metal Work, Heating Contractors & Specialties, Air Conditioning Service & Repair, Plumbers, Air Conditioning Contractors & Systems, Mechanical Contractors, Ventilating Contractors, Boiler Repair & Cleaning, Gas Plant Equipment, Water Heater Repair, Dust Collecting Equipment & Systems, Heating Equipment & Systems,Heating Equipment & Systems-Repairing, Piping Contractors, Controls, Control Systems & Regulators-Wholesale & Manufacturers, Boilers Equipment, Parts & Supplies, Building ContractorsOther Information

Services: Heating, Air Conditioning, Service & Repair, Installation

Same Day Service: Yes

Emergency Service: Yes

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