Compare Local Pros
Serrano Electric vs Therma
Santa Clara Electrical Contractors Comparison · Updated March 2026
Serrano Electric is an electrical contractor while Therma is a commercial mechanical/HVAC specialist, making this a comparison between entirely different trades.
| Serrano Electric | Therma | |
|---|---|---|
| Rating | ★ 4.2 | ★ 4.6 |
| Years Licensed | 39 years | 9 years |
| License # | 507852 | 1027316 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Morgan Hill, CA | San Jose, CA |
| Website | serranoelectric.com | www.therma.com |
Key Differences
What Customers Say
Therma
Customers consistently praise Therma's manufacturing precision, custom fabrication quality, and professional approach to commercial mechanical projects.
Key Takeaway: Therma has established review history documenting their commercial capabilities while Serrano Electric has limited public feedback to assess service patterns.
Customer Reviews
Serrano Electric
Professional , service oriented company . Some of the best Electricians one could ask for
Servicing for residential and commercial electrical needs
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 Serrano Electric if...
- ✓ You need electrical work—wiring, panels, lighting, or electrical repairs—rather than mechanical or HVAC services
- ✓ Your project is residential or smaller commercial electrical work in the Morgan Hill area
- ✓ You value nearly four decades of electrical code knowledge and experience diagnosing electrical issues
- ✓ You're comfortable proceeding with a contractor who has limited public review history
Consider Therma if...
- ✓ You need commercial HVAC ductwork, custom metal fabrication, or mechanical systems installation
- ✓ Your project involves specialty ducting components, medical gas systems, or industrial process equipment
- ✓ You're managing a commercial or industrial facility rather than a residential property
- ✓ You want documented customer feedback confirming quality manufacturing and professional service
Questions to Ask Before Hiring
- → Confirm with Serrano Electric what specific electrical services they provide and ask for references from recent projects similar to yours given the limited review history
- → Ask Therma directly whether they take on residential projects or smaller commercial jobs, as their review history suggests focus on industrial-scale manufacturing work
- → Verify with either contractor that they carry adequate liability insurance beyond the basic bond for your specific project type
The Bottom Line
This comparison only makes sense if you're unsure whether your project needs electrical or mechanical work. If you need electrical services—wiring, panels, circuits, lighting—Serrano Electric's 39 years of electrical experience makes them the appropriate choice despite limited reviews. If you need commercial HVAC ductwork, custom metal fabrication, or mechanical systems, Therma's documented manufacturing capabilities and commercial focus make them the clear fit. Don't choose based on experience years or reviews alone; choose based on which trade actually matches your project requirements.
Get Up to 3 Free Quotes
Compare prices from licensed, verified contractors
Frequently Asked Questions
Therma's documented work focuses on commercial HVAC duct manufacturing, custom fabrication for industrial facilities, and large-scale mechanical systems. Their capabilities suggest primarily commercial and industrial clients rather than residential service. If you need residential HVAC work, ask directly whether they take on smaller projects.
The experience difference only matters if you're comparing the same trade. Serrano's 39 years is specifically in electrical work, while Therma's 9 years is in commercial mechanical contracting. You can't directly compare experience across different specializations—what matters is choosing the right trade for your actual project needs.
Some established contractors simply haven't accumulated online reviews, which may reflect their customer base, marketing approach, or reliance on repeat business and referrals. The limited review history means you should ask Serrano directly for recent customer references to verify their current service quality and communication.
Yes, both maintain active California contractor licenses in good standing, carry workers compensation insurance, and hold $25,000 bonds meeting state requirements. These baseline protections are equivalent, though they're licensed for different trades—Serrano for electrical and Therma for mechanical contracting.
Looking for the Best?
See our ranked list of top electrical contractors in Santa Clara.
Other Santa Clara Electrical Contractors Comparisons
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 12, 2026.
This comparison is based on publicly available information. We recommend getting multiple quotes and verifying all credentials directly before hiring.
Get in Touch
Have questions or feedback? We'd love to hear from you.