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Pfeiffer Electric vs Therma
Santa Clara Electrical Contractors Comparison · Updated March 2026
You're comparing an electrical contractor with 65 years of experience to a mechanical/HVAC contractor with 9 years—these companies serve entirely different trades.
| Pfeiffer Electric | Therma | |
|---|---|---|
| Rating | ★ 5.0 | ★ 4.6 |
| Years Licensed | 65 years | 9 years |
| License # | 197773 | 1027316 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | San Jose, CA | San Jose, CA |
| Website | www.pfeifferelectric.com | www.therma.com |
Key Differences
What Customers Say
Pfeiffer Electric
Customers emphasize Pfeiffer's accessibility and responsiveness, praising easy communication and prompt service for electrical troubleshooting needs.
Therma
Customers highlight Therma's high-quality custom fabrication capabilities and professional approach to complex mechanical manufacturing projects.
Key Takeaway: Pfeiffer's reviews focus on service responsiveness and relationship-building for ongoing electrical needs, while Therma's reviews emphasize technical precision and manufacturing quality for specialized industrial components.
Customer Reviews
Pfeiffer Electric
The were super easy to get ahold of and came out to our clinic and helped us trouble shoot our electrical issues. I have also used them in the past at other facilities and their estimates a very compe...
My car broke down right in front of their shop about 30 minutes ago. I was SOL and then I looked up and saw a beacon of light shining out of their shop. It was like Jesus reappeared. I walked over and...
Pfeiffer Electric is a class act company! For many years have been using their services and they always deliver. The best thing about Pfeiffer Electric is their people. Every technician is knowledgeab...
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 Pfeiffer Electric if...
- ✓ You need electrical troubleshooting, repairs, panel upgrades, or wiring installations for residential or commercial properties
- ✓ You want a contractor with generational experience navigating Santa Clara County electrical codes and older building systems
- ✓ You value easy accessibility and responsiveness for electrical emergencies or urgent service calls
- ✓ Your project is residential or involves straightforward commercial electrical work rather than specialized industrial systems
Consider Therma if...
- ✓ Your project involves HVAC duct manufacturing, custom metal fabrication, or mechanical system installations
- ✓ You need specialty ducting components, custom electrical gutters, or precision fabrication for industrial equipment
- ✓ You're working on a commercial or industrial facility requiring plumbing, steam systems, or medical gas installations
- ✓ You need high-volume manufacturing capacity and dimensional accuracy for custom mechanical components
Questions to Ask Before Hiring
- → Confirm with each contractor that your specific project falls within their trade expertise and typical scope of work
- → Ask Pfeiffer whether they handle the specific electrical system or component you need repaired or installed
- → Ask Therma whether they provide installation services or primarily focus on manufacturing, and if they work on residential-scale projects
- → Request references from projects similar in scope and building type to yours, especially if your needs cross both electrical and mechanical trades
The Bottom Line
This comparison is only useful if you understand you're looking at two different trades. Choose Pfeiffer Electric if you need any electrical work—their 65 years of experience, responsive service model, and residential-friendly approach make them well-suited for troubleshooting, repairs, and installations. Choose Therma if you need mechanical contracting, HVAC duct manufacturing, or custom metal fabrication for commercial or industrial facilities. If your project genuinely requires both electrical and mechanical work, you'll likely need both contractors or a general contractor to coordinate the trades. Don't select based on years licensed alone—select based on which trade your project actually requires.
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Frequently Asked Questions
Not independently. Pfeiffer handles only electrical systems while Therma focuses on mechanical and HVAC work. If your project requires both trades, you would need to hire both contractors or find a general contractor who coordinates multiple trades. Ask each contractor if they typically coordinate with other trades on larger projects.
Therma's profile emphasizes commercial and industrial mechanical work, particularly custom fabrication and duct manufacturing. Their reviews highlight industrial-scale projects rather than residential service. If you have a residential HVAC need, ask directly whether they take residential projects and have experience with residential systems before proceeding.
Only if you need electrical work. The experience gap is irrelevant when comparing different trades. Pfeiffer's decades of electrical experience help with diagnosing hidden issues in older buildings and navigating code complexities, while Therma's 9 years in mechanical contracting demonstrates solid expertise for their specialized fabrication work.
It depends entirely on which building systems need work. If you're upgrading electrical panels, lighting, or power distribution, choose Pfeiffer. If you're replacing HVAC ductwork, installing mechanical systems, or need custom metal fabrication, choose Therma. Most commercial renovations require both trades working in coordination.
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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