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Plum Hvac vs Therma Tech
Santa Clara HVAC Contractors Comparison · Updated March 2026
Therma Tech brings 18 years of licensing versus Plum HVAC's 4 years, providing significantly deeper experience for complex HVAC projects and troubleshooting.
| Plum Hvac | Therma Tech | |
|---|---|---|
| Rating | ★ 5.0 | ★ 4.9 |
| Years Licensed | 4 years | 18 years |
| License # | 1087978 | 913806 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Mountain View, CA | San Jose, CA |
| Website | plumhvac.com | www.thermatechhvac.com |
Key Differences
What Customers Say
Plum Hvac
Plum HVAC customers consistently emphasize competitive pricing that beat competing bids, combined with efficient one-to-two day installation completion and responsive communication from owner Sam.
Therma Tech
Therma Tech customers highlight responsive same-day scheduling, thorough diagnostic explanations with photo documentation, and long-term satisfaction leading to repeat business over multiple years.
Key Takeaway: Plum's feedback centers on installation efficiency and price competitiveness, while Therma Tech's pattern reflects comprehensive service relationships including diagnostics, repairs, and ongoing maintenance beyond just installations.
Customer Reviews
Plum Hvac
Sam was great, his crew were on time and fast. Thank you all
We are very pleased with Plum HVAC. Their crew were very efficient and pleasant to work with. They explain things throughout the 2 day process. In our case it was to remove the existing gas furnace...
Sam and company has been great to work with. Response, schedule, arrival were well communicated. This is our second project with Plum.
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 Plum Hvac if...
- ✓ Your project is a straightforward installation like a heat pump replacement, ductless mini-split system, or furnace upgrade where competitive pricing is your primary concern and customers consistently report Plum's quotes coming in lower than competitors.
- ✓ You're specifically pursuing energy rebates through Peninsula Clean Energy or utility programs and want a contractor experienced in navigating these applications and maximizing available incentives.
- ✓ Your timeline matters and you value the efficient one-to-two day installation completion that customers regularly mention for Plum's projects.
- ✓ Your home is newer without complicated existing systems or you've already had diagnostics completed and know exactly what equipment you need installed.
Consider Therma Tech if...
- ✓ Your system needs diagnosis first because you're experiencing problems but aren't certain whether repair or replacement makes sense, and you want a contractor with 18 years of troubleshooting experience to assess the situation accurately.
- ✓ You're looking for an ongoing relationship including annual maintenance, emergency repair availability, and same-day service capability rather than just a one-time installation.
- ✓ Your project involves older infrastructure where hidden complications are likely, and you want a veteran contractor who has navigated countless unexpected issues during installations.
- ✓ You value having access to comprehensive services including ductwork assessment, dual fuel system expertise, and complex diagnostic capabilities that come with nearly two decades in business.
Questions to Ask Before Hiring
- → Ask Plum HVAC how they handle unexpected complications discovered during installation, such as damaged ductwork or electrical issues, and whether their pricing accounts for potential contingencies.
- → Ask Therma Tech whether their pricing remains competitive with installation-focused contractors, and request a detailed written estimate to compare against Plum's quotes.
- → Confirm with either contractor how long their current installation crew has worked together and who will be on-site for your specific project.
- → Ask both companies for references from projects completed in the past six months that match your specific system type and installation complexity.
The Bottom Line
If you're comparing quotes and Plum HVAC comes in significantly lower for a straightforward heat pump, mini-split, or furnace installation in a relatively newer home, their four years of solid performance and customer satisfaction make them a reasonable choice. However, Therma Tech's 18 years of licensing provides substantially more experience for homes with older systems, projects likely to encounter complications, or situations where you need diagnostic expertise before committing to replacement. Additionally, if you want ongoing service capability including maintenance and repairs from the same contractor who did your installation, Therma Tech's full-service model is the clear answer. For most homeowners, Therma Tech's veteran status justifies paying moderately more if pricing differs, but if budget is your primary constraint and the installation is straightforward, Plum's competitive pricing and solid installation track record make them viable.
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Frequently Asked Questions
Yes, it matters significantly for specific situations. While both demonstrate competent installation skills, Therma Tech's 18 years means they've encountered and solved complications that a 4-year-old company simply hasn't faced yet. If your home has older systems, unusual configurations, or the project uncovers hidden issues, that depth of experience becomes valuable. For straightforward replacements in newer homes, the gap matters less.
Not necessarily, as customers describe both companies as competitively priced and fair. However, Plum HVAC customers specifically and repeatedly mention their quotes coming in lower than multiple competitors, suggesting they may have a pricing advantage. The tradeoff is whether you're willing to pay potentially more for Therma Tech's deeper experience and full-service capability including future repairs and maintenance.
Plum HVAC's profile focuses heavily on installations rather than ongoing service and repairs, though they presumably provide warranty support. If you want a single contractor relationship for both installation and future maintenance, Therma Tech's full-service model including annual maintenance programs and emergency repairs makes them the clearer choice. Ask Plum directly about their post-installation service capabilities.
Both handle heat pump installations successfully, but Plum HVAC shows particular specialization in heat pump conversions and actively assists with utility rebate applications through programs like Peninsula Clean Energy. Therma Tech has broader HVAC experience including dual fuel systems and variable speed heat pumps. If maximizing rebates and competitive pricing for a heat pump project are priorities, Plum's focus may serve you well. For complex heat pump configurations, Therma Tech's veteran experience provides additional confidence.
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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 13, 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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