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Licensed HVAC Contractors in Ontario, California

Updated November 1, 2026 from CSLB's public license file · C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor

  • 51licensed HVAC contractors
  • 50active (Clear)
  • 2%with a suspension
  • 0%workers' comp exempt
  • 8.8 yrsmedian time licensed
  • 60.8%corp / LLC / partnership (39.2% sole owner)
  • 6new in the last 12 months
  • —change tracking began November 1, 2026

CSLB's public data lists 51 HVAC contractors with a mailing address in Ontario, and 50 of them (98%) show a Clear primary status.

The share with a suspension, 2%, is 2.1 points lower than the San Bernardino County rate for the same license (4.1%). About 0% report a workers' comp exemption, roughly the statewide norm for HVAC contractors.

Experience varies: 47.1% have been licensed 10+ years and 6 are new this year (median 8.8 years, vs 11.6 statewide).

In California this work generally calls for the C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor license (or a B license when it is part of a larger multi-trade job). See the C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor guide for what the license covers.

How to check a HVAC contractor's license in Ontario

  1. Look the company up by name or license number (search Ontario). On the profile, confirm three things: Clear status, the C-20 license for this kind of work, and a contractor's bond on file.
  2. Re-check the same number on CSLB's Instant License Check the day you sign; our copy is refreshed weekly and 2% of Ontario listings here already show a suspension.
  3. Match the license holder's name to the name on the written contract and the person you meet. Ask for proof of workers' comp if anyone besides the owner will work on site. Hiring checklist.

50 of 51 HVAC contractors in Ontario

Ontario HVAC contractors sorted with Clear licenses first, then by years licensed. Badges reflect CSLB's file dated November 1, 2026, not a rating of anyone's work.

Licensed HVAC contractors in Ontario
Business nameLicense #StatusYearsWorkers' compBond
Airite Heating and Air Conditioning INC 232930 Clear 61 Insured On file
Magnison and Moen INC 264898 Clear 56 Insured On file
Ontario Refrigeration Commercial Air Conditioning Heating & Contr 315638 Clear 50 Insured On file
Spec Construction CO INC 419626 Clear 44 Insured On file
Air Control Specialties INC 570881 Clear 37 Insured On file
Inter-City Energy Systems INC 587709 Clear 36 Insured On file
Air Control Systems INC 639003 Clear 34 Insured On file
Castillo Julio Antonio 844311 Clear 22 Insured On file
Myco Construction 853581 Clear 21 Insured On file
Jesse's Air Systems A / C & Heating 864645 Clear 21 Insured On file
Le Dao 864673 Clear 21 Insured On file
Specialized Dairy Service INC 875409 Clear 20 Insured On file
Just Everything Heating & Air INC 892799 Clear 19 Insured On file
Erwin Advanced Air Systems 897796 Clear 19 Insured On file
Kao Brian Yawching 897876 Clear 19 Insured On file
Norton General Contractors 909595 Clear 18 Insured On file
Marcos Air Conditioning 950285 Clear 16 Insured On file
Climate Controllers A Partnership the 953750 Clear 16 Insured On file
Foothill Heating & Air Conditioning 979917 Clear 13 Insured On file
Technicool Refrigeration 987769 Clear 13 Insured On file
Airtong Heating & Cooling 991016 Clear 12 Insured On file
Jn Construction INC 1001396 Clear 11 Insured On file
High Speed Rooter and Plumbing INC 1017796 Clear 10 Insured On file
Amj Mechanical 1031031 Clear 9 Insured On file
Jang Jason 1035039 Clear 8 Insured On file
Aboubakare Ansary 1042235 Clear 8 Insured On file
Custom Homes Construction 1045173 Clear 8 Insured On file
Diamond Air Services INC 1047483 Clear 7 Insured On file
Veltel Infrastructure Services LLC 1049531 Clear 7 Insured On file
Virtue Air Conditioning INC 1053503 Clear 7 Insured On file
Li Chun 1054025 Clear 7 Insured On file
A A HVAC INC 1057513 Clear 7 Insured On file
Just Temperature INC 1062818 Clear 6 Insured On file
Hao Julan 1083815 Clear 5 Insured On file
Park Phillip 1102884 Clear 3 Insured On file
All Pro Cooling Heating Plumbing & Electrical 1103983 Clear 3 Insured On file
West End Heating and Air 1110549 Clear 3 Insured On file
Adaptive Controls Services 1116142 Clear 2 Insured On file
A G Heating & Air 1132532 Clear 1 Insured On file
Ds HVAC INC 1132699 Clear 1 Insured On file
Pisces Plumbing 1133446 Clear 1 Insured On file
Nick Air Conditioning INC 1135910 Clear 1 Insured On file
Elite Precision Air Systems 1139417 Clear 1 Insured On file
Master Chill Heating and Air 1138989 Clear 1 Insured On file
Effina 1150901 Clear <1 Insured On file
Get It Repaired Heating and Air INC 1155418 Clear <1 Insured On file
Reliant Cooling and Power LLC 1156506 Clear <1 Insured On file
Air Bee HVAC 1158451 Clear <1 Insured On file
Dss High Performance HVAC Solutions 1158389 Clear <1 Insured On file
West Wind Mechanical INC 1163372 Clear <1 Insured On file

See all 51 HVAC contractors in Ontario

Source: CSLB public data · Updated November 1, 2026 Status can change at any time. Verify on CSLB's Instant License Check.

Frequently asked questions

How many licensed HVAC contractors are in Ontario?

CSLB's current public file lists 51 HVAC contractors with a Ontario mailing address. 50 have a Clear status, and 98% show no issues at all in the file (no suspension, no pending action, bond on file, not near expiration).

What license does a HVAC contractor need in California?

Look for C-20 on the license. 51 businesses in Ontario hold it. Small jobs under $1,000 with no permit and no employees are exempt; everything else needs a license (details).

How do I check a HVAC contractor's workers' comp?

Open the contractor's profile here to see the workers' comp type and insurer from CSLB's file. In Ontario, 98% of HVAC contractors list a policy, 0% claim an exemption and 2% show no current coverage. Confirm the policy with CSLB's workers' comp search before work starts. How to check workers' comp.

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