Selecting the right HVAC contractor affects the quality, cost, and longevity of your heating and cooling system. Here's how to find a trustworthy professional.
Essential Qualifications
Licensing
California requires HVAC contractors to hold a C-20 (HVAC) license:
Verify at cslb.ca.gov
Check for complaints or disciplinary actions
Confirm license is current and active
Insurance
Protect yourself from liability:
General liability insurance (minimum $500,000)
Workers' compensation coverage
Ask for certificates of insurance
Bonding
Licensed contractors must be bonded:
Protects you if work isn't completed
Provides recourse for contract violations
Experience Matters
Years in Business
Established companies have track records
Longevity suggests satisfied customers
New companies aren't necessarily bad, but require more vetting
Manufacturer Certifications
Factory-trained technicians
Access to OEM parts
May offer extended warranties
Specializations
Some contractors specialize in certain brands or systems
Match their expertise to your needs
Getting Quotes
Get Multiple Estimates
Three quotes minimum for major work
All quotes should include same scope of work
Beware of significantly low bids
What Quotes Should Include:
Detailed equipment specifications
Labor costs itemized
Permit fees
Warranty information
Timeline for completion
Red Flags:
Quotes given without home inspection
Pressure to decide immediately
Cash-only demands
Significantly below other quotes
Questions to Ask
About the Company:
How long have you been in business?
Are you licensed, bonded, and insured?
Who will perform the work?
Do you handle permits?
About the Work:
What size system do I need (show calculations)?
What brands do you recommend and why?
What warranties do you offer?
How do you handle problems?
About the Process:
What's your timeline?
Will you protect my home during work?
What payment schedule do you expect?
How do I contact you after installation?
Evaluating Reputation
Online Reviews
Check Google, Yelp, and BBB
Look for patterns in feedback
Note how company responds to complaints
References
Ask for recent customer references
Call and ask about their experience
Visit completed jobs if possible
Professional Associations
ACCA membership
NATE-certified technicians
Better Business Bureau rating
Contract Essentials
Ensure your contract includes:
Complete description of work
Equipment make, model, and specifications
Total price and payment schedule
Start and completion dates
Warranty terms
Permit responsibilities
Cleanup expectations
Bay Area Considerations
Local Experience
Familiarity with Bay Area building codes
Understanding of local climate needs
Relationships with permit offices
Utility Programs
Knowledge of rebate requirements
Ability to handle paperwork
Experience with program compliance
Emergency Service
24/7 availability matters in our variable climate
Response time commitments
After-hours rates
Avoiding Scams
Warning Signs:
Door-to-door salespeople
Extreme pressure tactics
Requests for large upfront payments
No physical business address
Refuses to provide references
Protect Yourself:
Never pay more than 10% deposit
Pay by credit card when possible
Get everything in writing
Verify permit has been pulled
Taking time to vet contractors thoroughly protects your investment and ensures quality work that will serve your home for years to come.