To do mechanical work in Michigan you need a mechanical contractor's license.

The Board issues contractor licenses in these classifications:

Hydronic heating, cooling, process piping
HVAC equipment
Ductwork
Refrigeration
Limited heating service
Unlimited heating service
Limited refrigeration, air conditioning service
Unlimited refrigeration, air conditioning service
Specialty

To clean ducts, a person or company must be licensed through the Michigan Mechanical Division in order to enter the duct system. He must hold ductwork endorsement. The contractor must also have heating license to clean a blower or air handler and must hold a A/C license to clean an A/C a-coil per MI BOCA code and Michigan inspectors.

Sanitizing

Anyone who offers pesticide application services for hire (which includes bidding on contracts and advertising) needs a Pesticide Applicator Business License (PABL). PABL expires annually on December 31st. The information below shows the firms that have a valid 2011 PABL as of 1/1/2011 6:10:28 AM. This list is updated monthly. If you are looking up a firm that is offering pesticide application services and do not find them on this list, please report this finding to the Michigan Department of Agriculture (MDA) Regional Office nearest you. MDA regional office information can be found at www.michigan.gov/mda.

For more information call:

Brian Rowe
Pesticide Section Manager
Michigan DEQ in Lansing, MI
(517)373-1087