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Rosati S I Air Conditioning
P O BOX 9122, Alta Loma, CA 917011122, USA
Verify this license yourself at the California Contractors State License Board (CSLB).
California's climate varies widely, from foggy coastal mornings to hot inland summers, and that range places steady demand on heating and cooling systems across the state. Rosati S I Air Conditioning serves California homeowners and property managers who need dependable comfort in every season. Its work reflects the conditions residents face in their own neighborhoods.
Services Offered
Service Area
About Rosati S I Air Conditioning
The company offers AC Services, Heating Services, Ductwork Services, Heat Pumps, Furnace Services, Thermostat Services, Emergency HVAC, and Maintenance & Tune-up. Typical jobs include inspecting equipment, diagnosing performance problems, repairing or replacing worn components, and checking airflow through ductwork. Maintenance visits focus on cleaning, testing controls, and identifying small issues before they become costly breakdowns, while emergency calls address systems that have stopped working during extreme weather.
Rosati S I Air Conditioning holds California contractor license #371026 and has been licensed since 1979, giving it more than 47 years of experience in the trade. Its service area covers California, where local climate, building styles, and equipment age all influence which system and repair approach makes the most sense for a given property.
Homeowners comparing local pros should confirm a contractor's license, request written estimates, and ask clear questions about the scope of work. Those who are searching for an HVAC contractor near me can review options and compare service details through HVAC Service Fast.
State license record
California license #371026
Active- Issued by
- Contractors State License Board (CSLB)
- Status
- Active as of Aug 4, 2026
- First issued
- Mar 1979 (47 years)
- Valid through
- Aug 31, 2027
- Business type
- Sole Owner
- County on file
- San Bernardino
What the license covers
- C-20 Warm-Air Heating, Ventilating and Air-Conditioning
From CSLB public license data as of Aug 4, 2026. Licenses change — confirm the current status at the California Contractors State License Board (CSLB).
Frequently Asked Questions
What services does Rosati S I Air Conditioning offer?
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Local context
Buying a new AC or heat pump in California
- California is in the DOE Southwest region: new central air conditioners installed since January 1, 2023 must meet at least 14.3 SEER2 and 11.7 EER2 (13.8 SEER2 and 11.2 EER2 for systems 45,000 BTU/h and larger). Heat pumps must meet 14.3 SEER2 and 7.5 HSPF2 nationwide.
- Since 2025, new systems are built for lower-impact refrigerants such as R-454B or R-32. Ask which refrigerant a quoted system uses and for its AHRI certificate number, which confirms the matched system’s rated efficiency.
Before you hire Rosati S I Air Conditioning
Based on the records we hold for this business.
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State license on record
CSLB lists #371026 as active (record dated Aug 4, 2026). Licensed since 1979. Re-check it yourself before work starts — it is free and takes a minute. Look it up: California Contractors State License Board (CSLB)
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Ask for proof of insurance
We have no insurance details on file. Ask for a certificate of general liability and workers' compensation coverage before anyone works in your home.
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Ask who pulls the permit
Replacing an AC, furnace, heat pump or water heater usually needs a local permit and inspection. A licensed contractor normally pulls it — ask that the permit is included in the written quote.
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Ask for local references
We do not have review data for this business yet. Ask for two or three recent customers near you.
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California homeowner protection
California law caps the down payment on a home improvement contract at 10% of the contract price or $1,000, whichever is less. Never pay more up front.
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Where this information comes from
- Name, address and phone
- State license records · added Aug 4, 2026
- California license
- CSLB public license data · record date Aug 4, 2026
- Profile summary
- Written automatically from the records above
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HVAC Service Fast is an independent HVAC directory and is not affiliated with this business. Listing details are compiled from publicly available information and may be incomplete or outdated. We do not endorse or guarantee any provider — please verify licensing and insurance directly. See our Disclaimer.