Boiler, hot water heating and steam fitting contractors in Ontario, CA

2 licenses with the C-4 classification list Ontario (San Bernardino County) as their address with the state, 2 of them active. Active licenses with nothing flagged come first.

• ✓Airite Heating and Air Conditioning IncC-4 · C-20 · C-38 · #232930 Ontario · San Bernardino County Active
• ✓Spec Construction Co IncA · B · C-4 · C-8 +9 · #419626 Ontario · San Bernardino County Active

Source: CSLB license file, Nov 8, 2026All trades in Ontario