Best Licensed HVAC Contractors in Ontario, CA
40 HVAC contractors registered in Ontario hold current CSLB licenses, verified against official records as of August 17, 2026. The 8 below are the top-ranked, ordered by years licensed.
- 644 active C-20 heating and air conditioning licenses in San Bernardino County; 40 registered in Ontario
- California requires workers' compensation cover for C-20 licensees: 38 of Ontario's 40 licenses (95.0%) carry a current policy with CSLB
- Median time licensed in Ontario: 9 years
- Longest Ontario licensure: since 1965
- 70 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1965
- Expires
- 2026-10-31
- Phone
- (909) 628-6035
- Verified
- August 17, 2026
- Licensed since
- 1970
- Expires
- 2026-10-31
- Phone
- (909) 947-3187
- Verified
- August 17, 2026
- Licensed since
- 1976
- Expires
- 2027-02-28
- Phone
- (909) 984-2771
- Verified
- August 17, 2026
- Licensed since
- 1982
- Expires
- 2027-08-31
- Phone
- (909) 947-4601
- Verified
- August 17, 2026
- Licensed since
- 1989
- Expires
- 2027-03-31
- Phone
- (909) 947-0535
- Verified
- August 17, 2026
- Licensed since
- 1990
- Expires
- 2028-02-29
- Phone
- (909) 785-5075
- Verified
- August 17, 2026
- Licensed since
- 1992
- Expires
- 2028-03-31
- Phone
- (909) 786-4230
- Verified
- August 17, 2026
- Licensed since
- 2005
- Expires
- 2027-11-30
- Phone
- (909) 456-9719
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Airite Heating And Air Conditioning Inc. | #232930 | On file | 1965 |
| Magnison And Moen Inc. | #264898 | On file | 1970 |
| Ontario Refrigeration Commercial Air Conditioning Heating & Contr | #315638 | On file | 1976 |
| Spec Construction Co Inc. | #419626 | On file | 1982 |
| Air Control Specialties Inc. | #570881 | On file | 1989 |
| Inter-city Energy Systems Inc. | #587709 | On file | 1990 |
San Bernardino County HVAC licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 644 active C-20 heating and air conditioning licenses in San Bernardino County, 40 of them registered in Ontario. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Ontario license has been held 9 years, and the longest-standing one dates to 1965. California law requires workers' compensation cover for C-20 licensees, so it is a legal baseline rather than a way to tell two contractors apart: 38 of Ontario's 40 licenses (95.0%) carry a current policy in CSLB's file, and we do not rank on it. The contractor bond is not a signal here: 644 of the county's 644 licenses carry the same $25,000 bond California sets by statute. 70 county licenses reach their expiration date within the next 90 days. CSLB cannot link straight to a license record, so every listing above shows its number for you to type into CSLB's license lookup. How we verify.
HVAC Contractors in Ontario: common questions
How many licensed HVAC contractors are there in Ontario?
40 active C-20 heating and air conditioning licenses are registered in Ontario, out of 644 across San Bernardino County. 40 Ontario-registered companies passed our license verification, and the 8 on this page are the top-ranked of those. Only licenses CSLB shows as CLEAR and unexpired are listed.
Does California license HVAC contractors?
Yes. California licenses contractors by classification, and C-20 is the CSLB classification that authorises this work. 40 active C-20 heating and air conditioning licenses are registered in Ontario and 644 across San Bernardino County, the longest-standing issued in 1965. Only CLEAR, unexpired licenses appear here.
How do I check an HVAC contractor's license in California?
Every listing above shows its CSLB license number. CSLB cannot link straight to a record, so open its license lookup and type the number in: it shows status, expiration, the contractor bond and workers' compensation cover, which California requires of C-20 licensees and 38 of Ontario's 40 currently carry. 70 San Bernardino County licenses expire within 90 days.