To ensure good customer relations, all of our estimators and technicians are trained in Ammonia Emergency Response Training and are certified for CFC Recoveries.  To enable us to be more responsive to your business needs and provide you with on site supervision of every job, all of our mechanics have a service vehicle, fully equipped for prompt 24 hour, 7 day per week service.  Consequently, we have a reputation for completing jobs on time and within projected cost estimates.  Janssen technicians are also members of the Refrigeration Division of Pipe fitters Local 636.

Further, for your convenience, we offer a leasing program through General Funding Corporation for your labor, material and equipment.  We can set up a monthly payment schedule, whereby you would own the equipment and materials at the end of the lease term.  To discuss lease arrangements, please contact our Leasing Division.

To better acquaint you with our services and experience, the following additional information is listed.    Should you have any questions, please do not hesitate to contact us to discuss your specific requirements.  We look forward to servicing your needs and working with you.

Service areas include:  The Eastern half of Michigan including the following areas:  Metro Detroit, Down River, Saginaw, Bay City, Flint and Ypsilanti.  Fully licensed and insured.

  • Boilers:  Repair, install and service all makes and models (both water and steam)

  • Compressors:  Rebuild and machining of all types of compressors (ammonia, freon and compressed air, including horizontals) with a large inventory of parts on site.

  • Compressed Air systems:  Layout, installation, service and overhaul (regardless of size or type).

  • DDC Controls:  Sales, service, and installation of building and mechanical automation systems including all Honeywell, Johnson, Andover, Allen Bradley, and other control systems.

  • Equipment:  Distributors for Vilter Authorized service center, Hansen and Henry valves, Howe, Frick, YHork, Kramer and Refrigeration Specialties.  FES perferred service provider.

  • Fabrication:  All types of piping, including sanitary piping for the food industry, compressed air and process piping.

  • HVAC Systems:  Repair, install and service all makes and models - heating and air conditioning sytems, air distribution systems, boilers and make up air units.

  • Ice Makers:  Sales, service and installation - including Vogt and Manitowoc.  Distributor for Howe and Scotsman.

  • Pneumatic Controls:  Complete design, service and installation of all types of pneumatic applications.

  • Service:  We specialize in solving system deficiencies.

Ammonia & Freon

Sales - Commercial and Industrial

Service - Commercial and industrial





Refrigeration Systems

Ammonia Systems

Niagara No-frost Systems

Air Conditioning


Boilers (steam & water)

Ventilation Systems

VAV and CAV Systems


Ultra Low-temp (two stage cascade systems)

Make-up Air Units

HVAC Rooftops

DDC Controls

Assorted types of piping:

Copper, Stainless, Steel, Victaulic


Food Processing


Pneumatic Controls

Computer Room Air Conditioning


Cooling Towers

Filtration Systems

Ice Makers

Transfer Systems

Dehumidifier Systems

Air Dryers

Exhaust Systems

Dust Collectors

Sheet Metal Fabrication and installation

Wind Tunnels

Ice Rinks

Compressed Air Systems

About Janssen Refrigeration

We are a licensed and insured full service organization
for commercial and industrial ammonia and freon refrigeration, process chillers, HVAC, boilers, and controls used by the automotive industry, industrial process businesses, meat and fish packers/processors, cold storage warehouse, bakeries, dairies, bottling plants, and restaurants.  We service all makes and models of ice making equipment and furnish a large variety of ice bins to meet your every need and space requirement.  We also provide heating, air conditioning, and complete building automation packages for office buildings and manufacturing companies.  Our services range from engineering design to complete turn-key projects and maintenance of your facilities equipment.


Janssen Refrigeration Services and Installs

Janssen Refrigeration has been serving Metro Detroit Since 1968


  • International Institute of Ammonia Refrigeration
  • Refrigeration Service Engineers Society
  • American Society of Heating, Refrigerating, Air conditioning Engineering Inc.
  • Chamber of Commerce
  • National Federation of Independent Businesses