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Elcor Electric vs Therma
Santa Clara Electrical Contractors Comparison · Updated March 2026
Elcor Electric is a residential electrical specialist with 39 years experience, while Therma is a commercial/industrial mechanical contractor focused on HVAC and fabrication.
| Elcor Electric | Therma | |
|---|---|---|
| Rating | ★ 4.6 | ★ 4.6 |
| Years Licensed | 39 years | 9 years |
| License # | 500228 | 1027316 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Santa Clara, CA | San Jose, CA |
| Website | www.elcorelectric.com | www.therma.com |
Key Differences
What Customers Say
Elcor Electric
Customers praise Elcor Electric for exceptional service that exceeds expectations, quality electrical work, and a family-oriented approach to customer relationships.
Therma
Customers highlight Therma's technical manufacturing capabilities, particularly precision custom fabrication for commercial ductwork and industrial components, with professional service delivery.
Key Takeaway: Elcor's reviews emphasize personal customer service and going above standard expectations, while Therma's feedback focuses on technical manufacturing quality and commercial-scale capabilities—reflecting their residential versus commercial market focus.
Customer Reviews
Elcor Electric
Google has been asking for reviews of places I've visited this year and I'm happy to add one for a company that goes above and beyond to provide a great product for the customer, a family atmosphere a...
Best electrical contractor organization in the bay area! Hands down!!
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 Elcor Electric if...
- ✓ You need electrical work for your home or business—wiring, panel upgrades, circuit installation, or general electrical repairs and improvements
- ✓ You value working with a veteran contractor whose 39 years of experience means they've diagnosed and solved virtually every electrical challenge
- ✓ The family atmosphere and exceptional customer service approach matters to you for a residential project
- ✓ You want an electrical specialist rather than a mechanical contractor
Consider Therma if...
- ✓ You're managing a commercial or industrial property requiring mechanical systems work, HVAC ductwork, or process equipment
- ✓ You need custom metal fabrication for specialty ducting components, electrical gutters, or precision industrial equipment
- ✓ Your project involves commercial-scale plumbing, medical gas systems, or complex HVAC installations
- ✓ You require high-volume manufacturing capabilities with dimensional accuracy for commercial mechanical components
Questions to Ask Before Hiring
- → Ask each contractor to confirm their specific trade license type and whether they typically serve residential or commercial clients
- → Request examples of projects similar to yours in scope and setting to verify their experience matches your needs
- → If considering Therma for any residential work, ask directly whether they take on home projects or focus exclusively on commercial clients
- → Ask Elcor about their experience with your specific electrical project type and timeline expectations
The Bottom Line
For homeowners needing electrical work, Elcor Electric is your contractor—their 39 years of electrical expertise and residential customer service focus directly address home electrical projects. Therma is a commercial mechanical contractor specializing in HVAC manufacturing and industrial fabrication, not residential electrical work. This isn't a quality comparison but a fundamental mismatch in trade specialization. If you need electrical work, contact Elcor. If you're managing commercial mechanical systems or need custom ductwork fabrication, contact Therma. Most homeowners reading this need Elcor Electric.
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Frequently Asked Questions
No. Therma holds a mechanical contractor license for HVAC, plumbing, and related systems—not an electrical contractor license. They cannot legally perform electrical work. Their expertise is in commercial mechanical systems and custom fabrication, not residential electrical services.
The comparison isn't relevant since they work in different trades. Elcor's 39 years reflects extensive electrical troubleshooting experience valuable for home projects. Therma's 9 years in commercial mechanical work is solid for their market. Choose based on what trade you actually need, not years alone.
Elcor Electric is appropriate for the electrical portions of a home renovation. Therma focuses on commercial mechanical systems and likely doesn't take residential projects. You would need a separate HVAC contractor if your renovation includes heating and cooling work.
This comparison may result from confusion about contractor license types or from a commercial property owner needing both electrical and mechanical work. For most homeowners, only Elcor Electric would be relevant. Therma serves commercial clients needing mechanical systems and custom fabrication capabilities.
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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