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Arsen Electric vs Therma
Santa Clara Electrical Contractors Comparison · Updated March 2026
Arsen Electric specializes in residential electrical work while Therma is a commercial-industrial mechanical contractor with minimal residential focus.
| Arsen Electric | Therma | |
|---|---|---|
| Rating | ★ 5.0 | ★ 4.6 |
| Years Licensed | 8 years | 9 years |
| License # | 1034404 | 1027316 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | San Jose, CA | San Jose, CA |
| Website | www.arsenelectric.com | www.therma.com |
Key Differences
What Customers Say
Arsen Electric
Customers consistently highlight Arsen Electric's clear communication, owner involvement, and efficient completion of residential electrical projects with transparent pricing.
Therma
Customers praise Therma's technical capabilities in commercial mechanical work, custom fabrication quality, and professional handling of industrial manufacturing projects.
Key Takeaway: Arsen Electric receives feedback from homeowners about residential service experience, while Therma's reviews come from commercial clients discussing industrial fabrication capabilities—they serve completely different markets.
Customer Reviews
Arsen Electric
Dmitry and the team at ARSEN Electric went above and beyond in both communication and service. I needed an EV Charger installed. The team walked me through the process, clearly communicated the cost w...
Reasonable quote, professional crew, excellent communication. The job was quickly scheduled and completed. I'm very happy with Arsen Electric's work!
Had some ceiling can lights that were not working. They came and fixed them very quickly. Highly recommend!
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 Arsen Electric if...
- ✓ You need residential electrical work of any kind—Arsen Electric's entire business model is built around serving homeowners with responsive scheduling and clear communication
- ✓ You're installing an EV charger or upgrading your electrical panel, where multiple customers specifically praise their thorough, professional installation work
- ✓ You value direct owner involvement and detailed explanations of work processes, which customers consistently report receiving
- ✓ You need quick turnaround with same-day service availability for electrical issues in your home
Consider Therma if...
- ✓ You own a commercial facility or industrial operation needing HVAC duct manufacturing or custom mechanical fabrication
- ✓ Your project requires specialty ducting components, medical gas systems, or precision industrial metal fabrication where Therma's manufacturing capabilities are relevant
- ✓ You're seeking a mechanical contractor for commercial plumbing, steam systems, or process equipment rather than residential electrical work
- ✓ You need high-volume manufacturing capacity for custom mechanical components, not home service work
Questions to Ask Before Hiring
- → Ask Therma directly if they perform residential electrical work and how many residential projects they complete annually—their portfolio suggests this isn't their market
- → Ask Arsen Electric for references from projects similar to yours, particularly if you're installing EV charging or upgrading panels
- → Confirm which contractor has crews available this week, as Arsen Electric's residential focus likely means faster scheduling for home projects
The Bottom Line
For any residential electrical project, choose Arsen Electric without hesitation. They specialize exclusively in serving homeowners, have proven residential electrical expertise, and receive consistent praise for communication and quality work on home projects. Therma is a commercial-industrial mechanical contractor whose capabilities in HVAC manufacturing and facility systems are irrelevant to residential electrical needs. This isn't a close comparison—it's a fundamental mismatch in contractor type. Contact Arsen Electric for your home electrical work.
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Frequently Asked Questions
While Therma holds a mechanical contractor license, their expertise and customer base are clearly commercial-industrial focused on HVAC manufacturing and mechanical systems, not residential electrical work. Hiring a commercial mechanical contractor for home electrical work means you'd be working with a company outside their primary market, likely facing higher pricing and less familiarity with residential service models.
No. Therma's specialty is commercial mechanical contracting and industrial fabrication, not residential electrical services. Arsen Electric is specifically structured to serve homeowners with electrical needs, has extensive residential project experience, and receives consistent feedback about homeowner-friendly communication and service.
Years licensed matters less than market focus here. Nine years of commercial mechanical experience doesn't translate to residential electrical expertise. Arsen Electric's eight years are specifically in serving homeowners with electrical needs, which is directly relevant to residential projects.
A commercial contractor quoting residential work outside their specialty should raise concerns about whether they understand the scope, have appropriate crews available, or can provide the responsive service homeowners need. Lower pricing from a mismatched contractor often signals unfamiliarity with the work type rather than genuine value.
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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