Compare Local Pros
JMX Electric vs Therma
Santa Clara Electrical Contractors Comparison · Updated March 2026
You're comparing an electrical contractor to a commercial mechanical contractor, which means these companies serve fundamentally different needs.
| JMX Electric | Therma | |
|---|---|---|
| Rating | ★ 4.0 | ★ 4.6 |
| Years Licensed | 18 years | 9 years |
| License # | 912307 | 1027316 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | San Jose, CA | San Jose, CA |
| Website | www.jmxelectric.com | www.therma.com |
Key Differences
What Customers Say
JMX Electric
Customers emphasize the owner's direct involvement in emergency electrical situations and utility coordination, with personal responsiveness being a defining characteristic of service delivery.
Therma
Customers consistently praise precision manufacturing quality and technical capabilities for commercial-scale custom fabrication projects rather than service responsiveness.
Key Takeaway: JMX's feedback centers on accessible, owner-driven emergency response for electrical issues, while Therma's reviews focus on manufacturing quality and technical execution for complex commercial mechanical projects—reflecting fundamentally different business models and customer relationships.
Customer Reviews
JMX Electric
John, the owner of JMX Electric, came out to help us with a meter release from the city after PGE pulled our meter after a fire that occurred to our neighbors property. John was nothing but profession...
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 JMX Electric if...
- ✓ You need electrical work of any kind: wiring, panel upgrades, circuit installation, lighting, or generator connections
- ✓ You're dealing with an electrical emergency or need utility coordination with PG&E or city authorities
- ✓ You want direct owner involvement and accessible communication, particularly important for residential projects
- ✓ Your project involves fire damage electrical restoration or meter release situations where regulatory coordination matters
Consider Therma if...
- ✓ You're managing a commercial or industrial facility requiring HVAC duct manufacturing or mechanical systems
- ✓ You need custom metal fabrication work, specialty ducting components, or precision manufacturing for industrial equipment
- ✓ Your project involves medical gas systems, commercial plumbing, or process equipment installation
- ✓ You're seeking a contractor with high-volume manufacturing capabilities for commercial-scale mechanical projects rather than residential service work
Questions to Ask Before Hiring
- → Confirm with each contractor whether they're licensed for the specific trade your project requires (electrical versus mechanical)
- → Ask JMX about their experience with your specific type of electrical project, whether residential service, commercial installation, or emergency response
- → Ask Therma whether they take on residential projects or if their focus is exclusively commercial and industrial mechanical work
- → Request references from projects matching both your project type and scale to ensure the contractor regularly handles work like yours
The Bottom Line
This comparison only makes sense if you're uncertain whether your project requires electrical or mechanical work. If you need anything electrical—wiring, panels, circuits, emergency repairs, utility coordination—JMX Electric is your contractor with 18 years of experience and strong owner involvement. If you need commercial HVAC manufacturing, custom ductwork, or mechanical systems for an industrial facility, Therma is the specialist. These aren't competing options for the same work; they're licensed for entirely different trades. Identify which trade your project falls under, then contact the appropriately licensed contractor.
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Frequently Asked Questions
No, these are separate license classifications in California. JMX is licensed specifically for electrical work, while Therma is licensed for mechanical contracting. If your project requires both trades, you'll need to hire separate contractors for each specialty.
Their review feedback and project descriptions consistently reference commercial and industrial clients, custom manufacturing, and Silicon Valley facilities rather than residential service calls. You should ask them directly if they take residential projects, but their business model appears oriented toward commercial mechanical contracting rather than home service work.
JMX's 18 years versus Therma's 9 years reflects time in business, but it's less relevant than the trade difference. Both have sufficient experience in their respective fields—veteran status for electrical work and experienced status for commercial mechanical work. The more important factor is matching the right trade specialty to your project needs.
No, you still need an electrical contractor for electrical work regardless of building type. Therma's commercial experience is in mechanical systems, not electrical. JMX handles both residential and commercial electrical projects and would be the appropriate contractor for any electrical scope.
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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