Compare Local Pros
Blue Arc Electric vs Therma
Santa Clara Electrical Contractors Comparison · Updated March 2026
This comparison pairs an electrical contractor with a commercial mechanical/HVAC contractor serving fundamentally different scopes of work.
| Blue Arc Electric | Therma | |
|---|---|---|
| Rating | ★ 4.5 | ★ 4.6 |
| Years Licensed | 22 years | 9 years |
| License # | 830904 | 1027316 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | San Jose, CA | San Jose, CA |
| Website | www.bluearcelectric.com | www.therma.com |
Key Differences
What Customers Say
Therma
Customers consistently praise Therma for high-quality manufacturing and fabrication work, professional service delivery, and strong technical capabilities in commercial mechanical projects.
Key Takeaway: Therma has documented customer feedback confirming quality execution while Blue Arc has limited public review history despite 22 years in business.
Customer Reviews
Blue Arc Electric
(Translated by Google) Pretty good (Original) Bastante bien
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 Blue Arc Electric if...
- ✓ You need electrical work specifically: panel upgrades, circuit installations, lighting systems, or electrical troubleshooting requiring a licensed electrician
- ✓ Your project involves older electrical systems where Blue Arc's 22 years of experience diagnosing legacy wiring and code compliance issues provides meaningful value
- ✓ You're working on residential electrical needs, as Blue Arc serves both residential and commercial clients rather than Therma's primarily commercial focus
Consider Therma if...
- ✓ You need mechanical contracting work: HVAC duct systems, commercial heating and cooling installations, plumbing, steam systems, or medical gas installations
- ✓ Your project requires custom metal fabrication or specialty ducting components where Therma's documented manufacturing capabilities and precision work are relevant
- ✓ You're undertaking a commercial or industrial mechanical project in Silicon Valley where Therma has established expertise and customer praise for technical execution
- ✓ You value documented customer feedback showing consistent quality and professional service delivery
Questions to Ask Before Hiring
- → Confirm which trade your project actually requires—if you need both electrical and mechanical work, ask each company if they coordinate with other trades or if you'll need to manage multiple contractors
- → Ask Blue Arc for recent project references since public review history is limited, particularly for projects similar in scope to yours
- → If your project scope crosses into both electrical and mechanical systems, ask each contractor how they typically handle coordination with the other trade
The Bottom Line
This comparison only makes sense if you're genuinely uncertain whether your project requires electrical or mechanical work, or if you're coordinating a larger project involving both trades. For electrical work—panel upgrades, wiring, circuits, lighting—choose Blue Arc Electric and leverage their 22 years of electrical expertise, but request recent customer references given limited public review history. For mechanical work—HVAC systems, ductwork, plumbing, custom metal fabrication—choose Therma and benefit from their documented technical capabilities and customer praise. If your project requires both trades, you'll likely need to hire both companies or find a general contractor who coordinates multiple specialties.
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Frequently Asked Questions
This comparison only makes practical sense if your project involves both electrical and mechanical systems, if you're unsure which trade you actually need, or if you're evaluating general contractor capabilities across trades. For a typical single-trade project, you should focus on contractors within the specific trade you need.
The experience difference matters within each respective trade but doesn't allow direct comparison. Twenty-two years of electrical experience means Blue Arc has likely encountered a wider range of electrical problems and code evolution. Nine years gives Therma solid mechanical contracting experience, and their customer reviews confirm they execute well within their specialty.
Blue Arc serves both residential and commercial electrical clients based on their description. Therma focuses primarily on commercial and industrial mechanical projects rather than residential work, with emphasis on facilities, custom fabrication, and commercial HVAC systems. If you have a residential need, clarify scope with each contractor directly.
Different companies have varying levels of public review presence regardless of quality. Blue Arc's 22-year track record suggests sustained customer relationships even without extensive online reviews. However, you should ask Blue Arc directly for references from recent projects to assess customer satisfaction patterns before making your decision.
Looking for the Best?
See our ranked list of top electrical 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 12, 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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