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RSM Mechanical - San Diego, CA
4329 36TH STREET, San Diego, CA 92104, USA
Verify this license yourself at the California Contractors State License Board (CSLB).
When San Diego homeowners start looking for AC Services, the trigger is usually a practical problem: a unit that stops cooling on a warm afternoon, a system that runs nonstop without keeping rooms comfortable, or a bill that climbs for no clear reason. RSM Mechanical - San Diego, CA is a California HVAC contractor that serves residential customers who want straightforward diagnoses and dependable repairs.
Services Offered
Service Area
About RSM Mechanical - San Diego, CA
The company's work spans AC Services, Heating Services, Ductwork Services, Heat Pumps, Furnace Services, Thermostat Services, Emergency HVAC, and Maintenance & Tune-up. In practice, that can mean checking refrigerant levels and electrical connections, inspecting ductwork for leaks or restricted airflow, testing a furnace's ignition and safety controls, or installing and wiring a new thermostat. Scheduled tune-ups keep equipment running efficiently, while emergency visits address failures that cannot wait.
The service area is San Diego, where climate conditions shape how equipment performs. Coastal marine air, inland heat waves, and seasonal humidity all place different demands on cooling and heating systems, so local experience with these patterns matters when diagnosing a problem.
RSM Mechanical - San Diego, CA holds California contractor license #1129352 on the state contractor registry and has been licensed since 2024. Anyone comparing local pros should request written estimates, confirm the license number independently, and ask questions before work begins. Readers who want to review HVAC contractor options can explore listings on HVAC Service Fast.
State license record
California license #1129352
Renewal due Nov 30, 2026- Issued by
- Contractors State License Board (CSLB)
- Status
- Active as of Aug 4, 2026
- First issued
- Nov 2024 (1 year)
- Valid through
- Nov 30, 2026
- Business type
- Corporation
- County on file
- San Diego
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 RSM Mechanical - San Diego, CA offer?
What areas does RSM Mechanical - San Diego, CA serve?
How do I choose a licensed, insured HVAC contractor in San Diego?
What should I check before hiring an HVAC professional?
What are signs it is time to call an HVAC professional?
Local market — San Diego
HVAC pros here
500
Have a website
56%
Cooling demand
720
Heating demand
1,226
Cooling/heating demand = annual degree days (NOAA). Electricity = state residential average (EIA).
Local context for San Diego
- RSM Mechanical - San Diego, CA is one of 310 businesses we list for ac services in San Diego (500 HVAC businesses in total).
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 RSM Mechanical - San Diego, CA
Based on the records we hold for this business.
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State license on record
CSLB lists #1129352 as active (record dated Aug 4, 2026). Licensed since 2024. 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.