Compare Local Pros
Global Heating And Cooling Services vs Therma Tech
Santa Clara HVAC Contractors Comparison · Updated March 2026
Therma Tech brings nearly double the licensing experience with 18 years versus Global's 9 years, which matters for diagnosing complex system issues and handling unforeseen complications.
| Global Heating And Cooling Services | Therma Tech | |
|---|---|---|
| Rating | ★ 5.0 | ★ 4.9 |
| Years Licensed | 9 years | 18 years |
| License # | 1025424 | 913806 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Milpitas, CA | San Jose, CA |
| Website | www.goglobalhvac.com | www.thermatechhvac.com |
Key Differences
What Customers Say
Global Heating And Cooling Services
Customers consistently emphasize Global's speed of service, with technicians diagnosing problems within minutes, offering phone troubleshooting, and prioritizing economical repairs over replacement sales.
Therma Tech
Customers highlight Therma Tech's thorough diagnostic approach with detailed explanations, photo documentation of findings, and professional workmanship that builds multi-year service relationships.
Key Takeaway: Global's feedback emphasizes rapid problem resolution and repair-first honesty, while Therma Tech's reviews focus more on educational thoroughness and comprehensive documentation alongside efficiency.
Customer Reviews
Global Heating And Cooling Services
John did a great job walking me through a quick fix to get my Nest thermostat to charge again by phone. Would highly recommend Global Heating and Cooling Services.
Joey came by promptly and on time, took a look at the hvac and immediately saw the problem. He got it fixed up the next day and the overall cost was really reasonable. All communication was quick and ...
I contacted John via text on Tuesday night. He got right back and scheduled to come out the next day. He showed up early, fixed the furnace quickly and charged me a very reasonable price (much less th...
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 Global Heating And Cooling Services if...
- ✓ Your HVAC system failed completely and you need fast, same-day diagnosis and repair to restore heating or cooling, particularly if the issue is likely straightforward like a failed capacitor or sensor
- ✓ You prefer a contractor who will recommend repair over replacement when feasible and provide economical solutions rather than pushing new equipment sales
- ✓ Your project involves standard residential HVAC equipment in typical configurations where 9 years of experience provides sufficient expertise for reliable installation and service
Consider Therma Tech if...
- ✓ Your home has an older or complex HVAC system where intermittent problems require deep diagnostic experience to identify root causes rather than just addressing symptoms
- ✓ You're planning a major installation involving dual fuel systems, variable speed equipment, or significant ductwork modifications where 18 years of experience navigating complications provides added confidence
- ✓ You value detailed documentation with photos of work performed and thorough explanations of system condition, particularly if you're building a maintenance history for a property you plan to own long-term
- ✓ You're looking for a long-term service relationship, as customer feedback indicates many clients return to Therma Tech over multiple years for ongoing maintenance and future projects
Questions to Ask Before Hiring
- → Ask both companies to describe the most complex diagnostic challenge they've encountered with your specific equipment brand and configuration to gauge relevant experience depth
- → Request examples of how each handles unexpected complications during installations, such as discovering outdated ductwork or electrical issues that weren't visible during initial assessment
- → If considering Therma Tech for their documentation approach, confirm they'll provide the photo reports and detailed findings for your specific project type
The Bottom Line
Therma Tech's 18 years of veteran experience provides meaningful advantages for complex diagnostics, major installations with potential complications, and homeowners who value detailed documentation and thorough explanations. Global Heating And Cooling Services delivers reliable service with 9 years of solid experience, emphasizing rapid diagnosis, repair-first honesty, and efficient problem resolution at fair prices. For straightforward repairs and standard installations, both companies have sufficient expertise and equally strong customer satisfaction. Choose Therma Tech if your project involves older equipment, complex system configurations, or if you're establishing a long-term maintenance relationship. Choose Global if you prioritize speed of service and economical repair recommendations for typical residential HVAC needs. Both maintain proper insurance and bonding, so your choice comes down to whether the situation warrants veteran-level experience or whether Global's established expertise sufficiently covers your needs.
Get Up to 3 Free Quotes
Compare prices from licensed, verified contractors
Frequently Asked Questions
For a simple swap of similar equipment in standard configurations, both companies have sufficient experience to complete the work reliably. The experience gap becomes more relevant if complications arise during installation, such as discovering code violations in existing ductwork, undersized gas lines, or structural modifications needed for new equipment. Therma Tech's additional years mean they've likely encountered and resolved more of these unforeseen issues across a wider range of building types and ages.
Customer feedback suggests both deliver on same-day availability for emergency calls, with Global particularly noted for diagnosing problems within minutes of arrival and Global customers specifically mentioning phone troubleshooting before visits. Therma Tech receives equal praise for emergency responsiveness including heat wave situations. For pure speed of diagnosis and repair completion, Global's feedback emphasizes rapid turnaround, while Therma Tech's includes more time spent on explanations and documentation, though both restore systems promptly.
Both companies receive consistent customer praise for fair and competitive pricing compared to other contractors in the area. The documentation and thorough explanations Therma Tech provides don't appear to come with premium pricing based on customer feedback. Your actual quote differences will depend on equipment specifications and project scope rather than experience level alone.
The practical risk is encountering a complex diagnostic situation or installation complication that Global's team has seen less frequently than Therma Tech's veteran technicians. This might result in longer troubleshooting time, additional service calls to fully resolve intermittent issues, or less optimal solutions for unusual configurations. For standard residential HVAC work, this risk is minimal, but increases with older homes, commercial-grade equipment, or systems with a history of mysterious failures.
Looking for the Best?
See our ranked list of top hvac contractors in Santa Clara.
Other Santa Clara HVAC Contractors Comparisons
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 13, 2026.
This comparison is based on publicly available information. We recommend getting multiple quotes and verifying all credentials directly before hiring.
Get in Touch
Have questions or feedback? We'd love to hear from you.