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Prime Air Conditioning vs Therma
Santa Clara HVAC Contractors Comparison · Updated March 2026
Prime Air Conditioning specializes in residential HVAC work, while Therma is a commercial and industrial mechanical contractor that doesn't serve typical homeowners.
| Prime Air Conditioning | Therma | |
|---|---|---|
| Rating | ★ 5.0 | ★ 4.6 |
| Years Licensed | 14 years | 9 years |
| License # | 964012 | 1027316 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Gilroy, CA | San Jose, CA |
| Website | www.primeairco.com | www.therma.com |
Key Differences
What Customers Say
Prime Air Conditioning
Customers consistently praise Prime Air Conditioning for punctuality, clear communication, thorough maintenance inspections, and responsive emergency service with professional technicians.
Therma
Customers praise Therma for high-quality custom fabrication work, manufacturing capabilities, and professional service in commercial and industrial mechanical projects.
Key Takeaway: Prime's reviews reflect typical homeowner priorities like communication and responsiveness, while Therma's reviews focus on manufacturing precision and commercial project capabilities, confirming their different markets.
Customer Reviews
Prime Air Conditioning
Cannot say enough good things about this company. They continue to do an excellent job keeping our HVAC unit in tip top shape. Family owned, very responsive and also follow up after the job is done.
Have used Prime AC multiple times now, and they always deliver! Really appreciate the help with fixing my wall mount heater just in time for the winter weather. Now everything's nice and comfortable ...
Prime AC had been our go to for HVAC for the last 4 years. They have great communication on updates with service appointments and returning phone calls within a timely manner. Our knowledgeable servic...
Therma
Did Stanford blood donation here today.
Can't say enough about this company this group of guys the work that they do and the high technology that they are getting involved in. There is a manager Paul there, great guy hard worker. The compan...
Top notch mechanical contractor. Very professional.
Consider Prime Air Conditioning if...
- ✓ You need residential HVAC service, repair, or installation for your Gilroy or Morgan Hill home
- ✓ You want a contractor with 14 years of residential experience who understands typical home heating and cooling systems
- ✓ You value ongoing maintenance relationships with biannual inspections and monthly billing options
- ✓ You need emergency repair service or planned system replacements with clear communication throughout the project
Consider Therma if...
- ✓ You operate a commercial or industrial facility requiring custom duct manufacturing or specialty fabrication
- ✓ You need medical gas systems, commercial plumbing, or industrial mechanical equipment services
- ✓ You require precision metal fabrication for commercial applications
- ✓ You are not a residential homeowner seeking typical HVAC services for your home
Questions to Ask Before Hiring
- → Ask Prime Air Conditioning for references from recent complete system replacements in homes similar to yours
- → Confirm Prime's availability for your project timeline and whether emergency service is included after installation
- → Ask about warranty coverage on both equipment and installation work
- → Inquire about financing options if you're replacing an entire HVAC system
The Bottom Line
If you're a homeowner in the Gilroy area needing HVAC service, repair, or installation, Prime Air Conditioning is your contractor. With 14 years serving residential customers, proper insurance coverage, and extensive experience in home heating and cooling systems, they're equipped to handle everything from emergency repairs to complete system replacements. Therma is not in the residential HVAC business and serves commercial and industrial clients exclusively. This isn't a competitive comparison for homeowners.
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Frequently Asked Questions
No, Therma is a commercial and industrial mechanical contractor that does not serve residential homeowners. Their work involves custom duct manufacturing, medical gas systems, and industrial fabrication for commercial facilities, not home HVAC service or installation.
The experience difference is less relevant than the business focus. Prime's 14 years are in residential HVAC work serving homeowners, while Therma's 9 years are in commercial and industrial mechanical contracting. For a homeowner, Prime's specialized residential experience is what matters.
Both hold California contractor licenses and appear in HVAC-related searches, but serve completely different markets. If you're a homeowner in Gilroy needing furnace or AC work, Prime Air Conditioning is the appropriate choice. Therma serves commercial and industrial clients, not residential customers.
Prime Air Conditioning handles ductwork installation and repair as part of residential HVAC projects. Therma manufactures custom ducting for commercial applications. For home ductwork as part of your heating and cooling system, Prime is equipped to serve you.
Looking for the Best?
See our ranked list of top hvac contractors in Santa Clara.
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How We Compare Contractors
License Verification
All license data is sourced from official California CSLB records and verified regularly.
Review Analysis
Customer reviews are aggregated from Google and analyzed to identify patterns in service quality.
Detailed Comparison
We analyze credentials, insurance, experience, and feedback to highlight meaningful differences.
Not all licensed contractors are created equal. While a valid license is the baseline requirement in California, contractors can vary significantly in experience, insurance coverage, and customer satisfaction.
- Experience matters: A contractor with 15+ years of experience has likely encountered and solved problems that newer contractors haven't faced yet.
- Workers' compensation protects you: If a contractor without workers' comp insurance has an employee injured on your property, you could be held liable.
- Reviews reveal patterns: Individual reviews can be misleading, but patterns across many reviews often reveal a contractor's true strengths and weaknesses.
- Bond amounts vary: A contractor's bond provides financial protection if they fail to complete work as agreed. Higher bonds offer more protection.
Taking time to compare contractors on these factors can save you from costly mistakes and help ensure your project is completed by a qualified professional.
Data Sources: License information from California CSLB. Ratings and reviews from Google. Last verified March 11, 2026.
This comparison is based on publicly available information. We recommend getting multiple quotes and verifying all credentials directly before hiring.
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