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Ace Furnace vs Air Temp
San Mateo HVAC Contractors Comparison · Updated March 2026
Ace Furnace brings 61 years of HVAC experience versus Air Temp's 19 years, with Ace showing broader service capabilities across both heating and cooling systems.
| Ace Furnace | Air Temp | |
|---|---|---|
| Rating | ★ 4.9 | ★ 4.3 |
| Years Licensed | 61 years | 19 years |
| License # | 235989 | 889684 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | South San Francisco, CA | San Mateo, CA |
| Website | — | airtempco.com |
Key Differences
What Customers Say
Ace Furnace
Customers consistently praise Ace Furnace for completing diagnostics and repairs in single visits with same-day availability, alongside clear technical explanations during service calls.
Air Temp
Air Temp's feedback centers on reliable scheduling, responsive communication when earlier appointments become available, and meeting required timeframes for commercial clients.
Key Takeaway: Ace emphasizes repair completion speed and diagnostic efficiency, while Air Temp focuses on scheduling reliability and owner accessibility for heating and commercial refrigeration work.
Customer Reviews
Ace Furnace
I'm giving this company five stars for the amazing job they did on our home AC repair service. They sent out a really skilled technician who handled everything professionally. I've always appreciated ...
I'd recommend this company to anyone. I found them online and took a chance-so glad I did! The technician did a superb air conditioning repair and was super pleasant to work with. He stayed profession...
I'm really thankful for the work they did on my furnace that was not blowing. The technician was professional, arrived right on time, and gave awesome customer service. The repair was solid and didn't...
Air Temp
Being without heat for over a month (me being lazy and in denial) Luis was great!!!! Gave me a time range when he could stop by and updated me when he could arrive earlier. He "allowed" me to watch...
Luis is always available to come to the rescue! He is reliable and his fees are in line with other Peninsula services.
Refrigeration Repair pros. That's what they are!!! They fixed our commercial refrigerator on time for my business to re-open. Great service...
Consider Ace Furnace if...
- ✓ Your HVAC system is older or uses discontinued components where deep historical equipment knowledge and parts sourcing experience becomes critical for finding solutions
- ✓ You need air conditioning repair or full-spectrum HVAC service rather than heating-only work, as Ace handles both cooling and heating systems comprehensively
- ✓ Same-day service completion matters because you need your system operational quickly, which multiple customers specifically mention Ace delivering
- ✓ You value detailed technical explanations during repairs, as Ace's feedback consistently highlights clear communication about diagnostic findings and repair processes
Consider Air Temp if...
- ✓ You operate a business with commercial refrigeration equipment requiring specialized attention, as this represents a core Air Temp competency not mentioned in Ace's service profile
- ✓ High owner involvement during your project is important to you, providing direct accountability and consistent communication throughout the service relationship
- ✓ Your primary need is heating system repair rather than cooling, aligning with Air Temp's demonstrated specialization in residential heating work
- ✓ You prefer working with a smaller operation where the owner remains closely connected to service delivery rather than a larger established company
Questions to Ask Before Hiring
- → Ask Ace Furnace whether their six decades of experience includes familiarity with your specific HVAC brand and model, particularly if you have an older or specialized system
- → Ask Air Temp about their cooling system capabilities if you anticipate needing both heating and AC service, since their feedback focuses primarily on heating and refrigeration
- → Ask both companies for their current availability and typical timeframe from call to completed repair, given their different operational approaches to scheduling
- → Request references from projects similar to yours in scope and equipment type to understand how each company handles your specific situation
The Bottom Line
Ace Furnace represents the stronger choice for most residential HVAC situations in San Mateo County. Their 61 years of continuous operation provides unmatched diagnostic depth, their service scope covers both heating and cooling systems, and customer feedback consistently highlights same-day repair completion and clear technical communication. Air Temp serves a valid niche if you specifically need commercial refrigeration work or strongly prefer high owner involvement in a heating-focused operation, but Ace's broader capabilities and efficiency make them the more versatile contractor. Unless you operate a business requiring refrigeration service, Ace's combination of experience depth, comprehensive HVAC coverage, and demonstrated repair speed positions them as the practical first choice.
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Frequently Asked Questions
For simple component replacements on newer equipment, both companies have sufficient expertise. The experience gap becomes significant when diagnostics get complicated, when you have an older system with discontinued parts, or when initial repairs reveal underlying issues requiring judgment calls about repair versus replacement. Ace's additional four decades means broader exposure to equipment variants and failure patterns.
Air Temp handles residential heating repairs according to their feedback, so they're qualified for furnace work. However, if you need air conditioning service or anticipate needing both heating and cooling support over time, Ace's demonstrated full-spectrum HVAC capability provides more comprehensive coverage. Commercial refrigeration expertise doesn't directly transfer to residential AC systems.
Ace Furnace's feedback specifically highlights same-day service availability and single-visit repair completion, suggesting stronger capability for urgent situations. Air Temp emphasizes responsive communication and reliability for scheduled appointments. If you're facing an emergency right now, ask both companies directly about their current availability and typical response time for urgent calls.
High owner involvement offers direct accountability and consistent communication, which some homeowners prefer. However, Ace's feedback consistently mentions clear technical explanations and efficient service despite their larger scale, suggesting they maintain quality communication. The choice depends on whether you prioritize working directly with the owner or value the depth of resources a six-decade operation provides.
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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 11, 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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