HVAC contractor (warm-air heating, ventilating and air conditioning)s in Ontario, CA
51 licenses with the C-20 classification list Ontario (San Bernardino County) as their address with the state, 50 of them active. Active licenses with nothing flagged come first.
- A G Heating & AirC-20 · #1132532 Ontario · San Bernardino County Active
- Aa HVAC IncC-20 · #1057513 Ontario · San Bernardino County Active
- Adaptive Controls ServicesC-20 · #1116142 Ontario · San Bernardino County Active
- Air Bee HVACC-20 · #1158451 Ontario · San Bernardino County Active
- Air Control Specialties IncC-20 · #570881 Ontario · San Bernardino County Active
- Air Control Systems IncC-2 · C-20 · #639003 Ontario · San Bernardino County Active
- Airite Heating and Air Conditioning IncC-4 · C-20 · C-38 · #232930 Ontario · San Bernardino County Active
- Airtong Heating & CoolingC-20 · #991016 Ontario · San Bernardino County Active
- All Pro Cooling Heating Plumbing & ElectricalC-10 · C-20 · C-36 · #1103983 Ontario · San Bernardino County Active
- Amj MechanicalC-10 · C-20 · C-61/D-35 · #1031031 Ontario · San Bernardino County Active
- Ansary AboubakareB · C-20 · C-38 · #1042235 Ontario · San Bernardino County Active
- Brian Yawching KaoB · C-10 · C-20 · C-36 · #897876 Ontario · San Bernardino County Active
- Chun LiC-20 · #1054025 Ontario · San Bernardino County Active
- Custom Homes Contractor Dba Custom Homes ConstructionB · C-20 · C-38 · #1045173 Ontario · San Bernardino County Active
- Dao LeC-20 · #864673 Ontario · San Bernardino County Active
- Diamond Air Services IncB · C-20 · C-43 · #1047483 Ontario · San Bernardino County Active
- Ds HVAC IncC-20 · #1132699 Ontario · San Bernardino County Active
- Dss High Performance HVAC SolutionsC-20 · #1158389 Ontario · San Bernardino County Active
- EffinaC-20 · #1150901 Ontario · San Bernardino County Active
- Elite Precision Air SystemsC-20 · #1139417 Ontario · San Bernardino County Active
- Erwin Advanced Air SystemsC-20 · #897796 Ontario · San Bernardino County Active
- Foothill Heating & Air ConditioningC-20 · #979917 Ontario · San Bernardino County Active
- Get It Repaired Heating and Air IncC-20 · #1155418 Ontario · San Bernardino County Active
- High Speed Rooter and Plumbing IncA · C-10 · C-20 · C-36 +1 · #1017796 Ontario · San Bernardino County Active
- Inter-City Energy Systems IncB · C-10 · C-20 · C-36 · #587709 Ontario · San Bernardino County Active
- Jason JangC-20 · #1035039 Ontario · San Bernardino County Active
- Jesse'S Air Systems A / C & HeatingC-20 · #864645 Ontario · San Bernardino County Active
- Jn Construction IncA · B · C-10 · C-16 +2 · #1001396 Ontario · San Bernardino County Active
- Julan HaoB · C-20 · #1083815 Ontario · San Bernardino County Active
- Julio Antonio CastilloC-10 · C-20 · #844311 Ontario · San Bernardino County Active
- Just Everything Heating & Air IncC-20 · #892799 Ontario · San Bernardino County Active
- Just Temperature IncC-20 · #1062818 Ontario · San Bernardino County Active
- Magnison and Moen IncC-20 · #264898 Ontario · San Bernardino County Active
- Marcos Air ConditioningC-20 · #950285 Ontario · San Bernardino County Active
- Master Chill Heating and AirC-20 · #1138989 Ontario · San Bernardino County Active
- Myco ConstructionB · C-17 · C-20 · C-27 +2 · #853581 Ontario · San Bernardino County Active
- Nick Air Conditioning IncC-20 · #1135910 Ontario · San Bernardino County Active
- Norton General ContractorsB · C-10 · C-20 · #909595 Ontario · San Bernardino County Active
- Ontario Refrigeration Commercial Air Conditioning Heating & ContrC-20 · C-38 · #315638 Ontario · San Bernardino County Active
- Phillip ParkC-20 · #1102884 Ontario · San Bernardino County Active
Source: CSLB license file, Nov 6, 2026All trades in Ontario