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All Bay Mechanical vs Therma Tech
Santa Clara HVAC Contractors Comparison · Updated March 2026
Both are veteran contractors with full protection, but Therma Tech shows significantly broader service capabilities and stronger customer communication patterns.
| All Bay Mechanical | Therma Tech | |
|---|---|---|
| Rating | ★ 5.0 | ★ 4.9 |
| Years Licensed | 22 years | 18 years |
| License # | 827925 | 913806 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Gilroy, CA | San Jose, CA |
| Website | www.allbaymechanical.com | www.thermatechhvac.com |
Key Differences
What Customers Say
All Bay Mechanical
Customers emphasize clean, efficient installation work with thorough post-installation testing to verify system functionality.
Therma Tech
Customers consistently praise rapid response times, thorough diagnostic explanations with photo documentation, and professional workmanship across diverse project types.
Key Takeaway: Therma Tech shows extensive customer feedback across emergency repairs, diagnostics, and maintenance services, while All Bay's feedback centers specifically on installation quality without evidence of the broader service range.
Customer Reviews
All Bay Mechanical
Had a split system replaced in my condominium. Top notch work. Their installation was clean, efficient, and effective. They stuck around to test everything afterward. Highly recommend them to anyone l...
Therma Tech
Those of you reading my reviews, you know how important quality of service is to me. Any company I come in contact with, I pay close attention to their quality of service, value and even some time aft...
Everyone at Therma Tech was great to work with and professional. They worked with us to get the duct work done as soon as possible to get the heat back on for our tenants.
Very honest and knowledgable. They arrive right on time and are able to root-cause the issue and fix it in no time. Highly recommend them.
Consider All Bay Mechanical if...
- ✓ You have a straightforward system replacement project where installation quality is the primary concern and thorough post-installation testing matters more than diagnostic services.
- ✓ You're located specifically in Gilroy rather than San Jose and prefer working with a contractor based in your immediate area.
- ✓ You value the deepest possible industry tenure and All Bay's 22 years versus 18 years is meaningful to your decision.
Consider Therma Tech if...
- ✓ You need diagnostic work to determine what's actually wrong with your system before committing to replacement, as Therma Tech demonstrates clear expertise in troubleshooting and explaining issues.
- ✓ You value responsive scheduling and communication, particularly if you need same-day or emergency service capability that customers consistently mention.
- ✓ Your project involves components beyond basic installations like ductwork modifications, heat pump systems, or you want ongoing maintenance relationships.
- ✓ You appreciate detailed documentation and explanations of work performed, as Therma Tech's pattern of photo sharing and thorough customer education is well-established.
Questions to Ask Before Hiring
- → Ask All Bay Mechanical about their diagnostic and repair capabilities if your situation requires troubleshooting rather than straightforward replacement.
- → Ask Therma Tech about their typical response time for projects in Gilroy specifically, since they're based in San Jose.
- → Ask both companies for references from projects similar in scope to yours, particularly if your needs fall outside typical installations.
The Bottom Line
Both contractors offer veteran expertise and full homeowner protection, but Therma Tech demonstrates broader service capabilities and stronger customer communication patterns that matter for most situations. Choose All Bay Mechanical if you're in Gilroy with a straightforward installation project where their 22-year tenure and quality installation focus align with your needs. Choose Therma Tech if you need diagnostic work, value responsive communication with documentation, require emergency service capability, or want a contractor with demonstrated maintenance and repair expertise beyond installations. For most homeowners needing comprehensive HVAC services, Therma Tech's proven service breadth and consistent customer engagement patterns make them the stronger choice despite slightly less tenure.
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Frequently Asked Questions
For straightforward HVAC installations, both companies have veteran-level experience sufficient for quality work. The practical difference shows more in service breadth than installation capability. If you need only installation work, both have decades of expertise. If you need diagnostic troubleshooting, emergency repairs, or maintenance services, Therma Tech shows clearer evidence of handling those situations regularly.
Therma Tech demonstrates clear same-day and emergency service capability that customers specifically mention, including responses during heat waves. All Bay Mechanical's available information focuses on planned installation projects without customer feedback mentioning emergency response times or rapid service. If emergency capability matters, ask All Bay directly about their response times before deciding.
Customer feedback shows Therma Tech maintains systematic communication including appointment confirmations via text and email, photo documentation of work, and detailed explanations that appear across multiple reviews. All Bay's feedback emphasizes quality workmanship and testing but doesn't mention the same level of communication documentation. If you value detailed updates and visual documentation throughout the project, Therma Tech shows a consistent pattern of providing this.
All Bay operates from Gilroy while Therma Tech is based in San Jose. For standard scheduled work, both serve the broader county area. If you need emergency service or prefer a contractor based in your immediate community, location becomes more relevant. Ask about typical response times and any travel charges if you're concerned about distance from their base.
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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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