State,Finding,What we checked,Confidence,"Establishments (CBP 2023, NAICS 238220)"
Colorado,No state HVAC contractor license found,Searched state plumbing board page (blocked) and statute indexes; see excluded.md,not found,2620
Illinois,No state HVAC contractor license found,See excluded.md for searches,not found,4070
Indiana,No state HVAC contractor license found,See excluded.md for searches,not found,2008
Kansas,No state HVAC contractor license found,See excluded.md for searches,not found,1028
Maine,Fuel technician licensing only (Oil and Solid Fuel Board; propane and natural gas),32 M.R.S. ch. 33 (Oil and Solid Fuel Board),interpretation needed,781
Massachusetts,Refrigeration technician license (Office of Public Safety and Inspections),"Mass.gov, Apply for a Refrigeration Technician License",interpretation needed,3069
Minnesota,No state HVAC contractor license found,Department of Labor and Industry licensing page returned 404; see excluded.md,not found,1816
Missouri,No state HVAC contractor license found,See excluded.md for searches,not found,1915
Montana,No state HVAC contractor license found (construction contractor registration only),"Montana DLI, Montana Contractor registration page",not found,712
Nebraska,No state HVAC contractor license found,Nebraska DOL contractor registration page timed out; see excluded.md,not found,837
New Hampshire,No state HVAC contractor license found (gas fitting licensing not verified),See excluded.md,not found,776
New York,No state HVAC contractor license found,NY Department of State licensing services list; see excluded.md,not found,7061
North Dakota,No state HVAC contractor license found,Secretary of State contractor page returned 404; see excluded.md,not found,336
Oregon,No HVAC-specific state contractor license found,See excluded.md,not found,1337
Pennsylvania,No state HVAC contractor license found,Attorney General home improvement page blocked; see excluded.md,not found,4154
South Dakota,No state HVAC contractor license found,"SD Department of Labor and Regulation A to Z index (lists plumbing licensing, no HVAC entry)",not found,401
Vermont,"Electrical specialist, refrigeration and air conditioning (Division of Fire Safety)",Vermont Division of Fire Safety licensing page,interpretation needed,303
Washington,No HVAC contractor license found (general contractor registration),RCW 18.27.020,not found,2242
Wyoming,No state HVAC contractor license found,Wyoming State Fire Marshal electrical licensing page,not found,315