Compare Local Pros
Hassler Heating And Air Conditioning vs Mercury Heating And Air Conditioning
Contra Costa HVAC Contractors Comparison · Updated March 2026
Hassler brings 26 years of licensed experience handling complex HVAC situations, while Mercury offers 8 years with notable owner involvement and same-day responsiveness.
| Hassler Heating And Air Conditioning | Mercury Heating And Air Conditioning | |
|---|---|---|
| Rating | ★ 4.9 | ★ 5.0 |
| Years Licensed | 26 years | 8 years |
| License # | 770180 | 1040640 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | El Cerrito, CA | Brentwood, CA |
| Website | www.hasslerheating.com | www.mercuryheatingandair.com |
Key Differences
What Customers Say
Hassler Heating And Air Conditioning
Customers consistently praise Hassler's systematic diagnostic approach with detailed photo and video documentation, thorough explanations of findings, and professional technical expertise.
Mercury Heating And Air Conditioning
Mercury receives repeated recognition for honest recommendations that identify minor repairs instead of expensive replacements, same-day emergency responsiveness, and direct owner involvement throughout projects.
Key Takeaway: While Hassler emphasizes comprehensive diagnostics and educational explanations, Mercury distinguishes itself through cost-saving honesty and exceptional emergency availability with owner accountability.
Customer Reviews
Hassler Heating And Air Conditioning
We had Hassler Heating & Air replace the ductwork under our house, and the experience was excellent from start to finish. The team was professional, punctual, and clearly knew what they were doing. Th...
Friendly, intelligent service. Thoroughly checked my heating system and showed in great detail what the problems are. The technician provided detailed inspection and we both agreed that it will be nec...
The crew was professional and courteous while being in my home which was very appreciated. Larry in particular was kind enough to answer my many questions to ensure I understood my new system so that ...
Mercury Heating And Air Conditioning
Ian came same day I was telling him how we were quoted for a new unit. He came to look at it and it was a stuck gas valve! He was honest and professional and great communication! He saved us 22,000! H...
We had an amazing experience with Mercury Heating and Air! Ian, the owner, is not only incredibly knowledgeable and professional, but also one of the kindest people you'll meet. He's originally from H...
Great service, fast response, family owned and operated ! They installed our new HVAC a few years ago and we have been very happy with it! I highly recommend Mercury heating and Air. Ian is great. ...
Consider Hassler Heating And Air Conditioning if...
- ✓ Your home is older with original HVAC equipment, unusual ductwork, or previous additions where complex diagnostic experience matters for identifying underlying issues
- ✓ You're planning a major system replacement or electrification project where having seen every type of installation challenge over decades provides confidence
- ✓ You value detailed photo and video documentation of system conditions for your records or to support warranty claims
- ✓ Your property is in El Cerrito or western Contra Costa County where they're locally based
Consider Mercury Heating And Air Conditioning if...
- ✓ You want direct owner involvement throughout your project with personalized attention and consistent point of contact
- ✓ You're concerned about being oversold and appreciate Mercury's documented pattern of recommending cost-effective repairs over replacements
- ✓ You need same-day emergency service during heat waves or cold snaps, which appears consistently in their customer feedback
- ✓ Your property is in Brentwood or eastern Contra Costa County where they operate
Questions to Ask Before Hiring
- → Ask Hassler about owner involvement in your specific project and who will handle on-site diagnostics and installations
- → Ask Mercury about their experience with your specific system type or home configuration, particularly if you have an older or complex setup
- → Request references from both companies for projects similar to yours in scope and complexity
- → Confirm response time expectations for emergency service based on your specific location within Contra Costa County
The Bottom Line
For most homeowners, Hassler's 26 years of licensed experience provides meaningful advantages when handling complex diagnostics, older home complications, or major system replacements where having seen every scenario matters. Their systematic, photo-documented approach suits homeowners who value thorough documentation and technical depth. Choose Mercury if you prioritize direct owner involvement, appreciate their documented pattern of honest recommendations that avoid unnecessary replacements, or need same-day emergency service. Mercury's 8 years establishes genuine competence rather than inexperience. If your project is straightforward and you're in Brentwood, Mercury offers solid value with personal accountability. For complex situations, older homes, or western county locations, Hassler's veteran experience justifies serious consideration.
Get Up to 3 Free Quotes
Compare prices from licensed, verified contractors
Frequently Asked Questions
For straightforward replacements in newer homes with standard configurations, both contractors have sufficient experience. The gap becomes significant if your project involves complications like outdated ductwork, challenging attic access, asbestos considerations in older homes, or proper system sizing for homes with additions. Hassler's additional 18 years means they've handled these complications repeatedly.
Customer feedback consistently mentions direct owner interaction at Mercury during consultations, diagnostics, and installations, not just initial estimates. This differs from many HVAC companies where owners handle sales but field crews do the work. If owner accountability matters to you, confirm this specifically when scheduling your consultation.
Mercury's reviews specifically highlight same-day emergency response during urgent situations, making them strong for crisis repairs. Hassler demonstrates solid responsiveness but emphasizes systematic diagnostics more than speed. For planned replacements where experience with complications matters most, Hassler's 26 years provides an advantage. For urgent repairs where immediate availability is critical, Mercury's track record stands out.
Hassler operates from El Cerrito serving western Contra Costa County, while Mercury is based in Brentwood serving the eastern areas. Both can likely service your location, but response times for emergencies and scheduling flexibility may favor the contractor closer to your home. Confirm typical response times for your specific address with each company.
Looking for the Best?
See our ranked list of top hvac contractors in Contra Costa.
Other Contra Costa HVAC Contractors Comparisons
Hassler Heating And Air Conditioning
★ 4.9
High Performance Heating & Air
★ 5.0
Clean Air HVAC
★ 4.8
Hassler Heating And Air Conditioning
★ 4.9
Elite Comfort Systems
★ 5.0
Hassler Heating And Air Conditioning
★ 4.9
California Heating And Cooling
★ 4.7
Hassler Heating And Air Conditioning
★ 4.9
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 11, 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.