Best Air Conditioning & Heating Companies in San Francisco, CA

Best Pick Certified Air Conditioning and Heating companies in San Francisco, CA have earned their status through independent consumer research—not paid placement. To qualify, a company must meet strict standards:

• High customer satisfaction: 4.0+ Google rating (25+ reviews) OR 80%+ recommendation rate from surveyed customers
• Verified credentials: Active state licenses, general liability insurance, and workers' comp (where required)
• Financial stability: Clean credit history and active Secretary of State standing
• Local track record: Minimum 1 year serving the San Francisco, CA area

Certification is re-verified annually, ensuring continued performance.

No. Air Conditioning and Heating companies cannot buy Best Pick Certification, improved ratings, or better placement. Our research team independently evaluates companies based on customer satisfaction, licensing, insurance, and business stability—before any business relationship exists.

Companies that earn certification pay a participation fee after qualifying, which covers the cost of ongoing research and publication. This fee has no influence on whether a company qualifies or how they appear in our directory.

The Best Pick Guarantee provides financial protection—up to $2,500 in labor costs—if a Certified Best Pick Air Conditioning and Heating company fails to deliver on their commitments.

To be eligible:

• Contact the company through Best Pick Reports or BestPickReports.com
• Register for the guarantee (free)
• Submit any claim within 45 days of the final date of service
• Allow the company the opportunity to resolve the issue first

This guarantee applies only to Certified Best Pick companies, not Standard Pros. Full terms are available on our guarantee page.

If your home feels perpetually chilly or damp despite the heater running, your system might be losing the battle against the persistent marine fog that rolls through the city. Many Victorian and Edwardian homes in neighborhoods like Haight-Ashbury or Noe Valley weren't originally built with ductwork, and older retrofitted floor or wall furnaces often operate at very low efficiency, struggling to push consistent warmth through high-ceiling rooms. You should also listen for metallic clanging or whistling; the salt-heavy air near the coast accelerates corrosion on any outdoor equipment, which can lead to premature failure of moving parts. If you notice a sharp rise in your PG&E bill or uneven heat between floors, it is likely a sign that your aging heating system needs a professional look to avoid a total breakdown during a damp winter.

Before you call for service, check your air filters, especially if there has been recent wildfire smoke in the region; regional fires can clog filters with fine ash in just a few days, suffocating your furnace. Next, ensure your registers aren't blocked by furniture, a common issue in dense, narrow floor plans where space is tight. If you have an outdoor unit, look for signs of heavy salt crusting on the coils from the marine air, which can be gently rinsed with water to restore airflow. If your system is fairly old, check for any 'Service' lights on your thermostat, as you may be eligible for weatherization rebates through BayREN before moving forward with a major fix. However, if you smell gas or see any charring around the pilot light of your floor furnace, stop immediately and contact a licensed HVAC company—igniter and gas valve issues are safety risks that require expert tools.

In this area, heating retrofits for pre-war homes are highly sought after because 65% of our housing stock was built before 1940 and often relies on outdated, drafty wall or floor furnaces. Ductless heat pump conversions are becoming the standard solution for these historic properties, as they provide efficient heating without requiring the massive renovation needed to run ducts through old balloon-frame walls. Technicians also specialize in air quality upgrades, installing high-efficiency MERV-13 filters and whole-home air purifiers to protect residents from recurring seasonal wildfire smoke that the heavy marine fog can often trap in the valley. Additionally, with the city's focus on electrification, many residents are utilizing a trusted HVAC expert to transition away from natural gas to all-electric systems that satisfy modern 2022 Title 24 energy standards.

When searching for the best HVAC company, start by verifying that they hold a valid C-20 contractor license from the state and carry current workers’ compensation and general liability insurance. Ask if their technicians are NATE-certified and hold the federally required EPA 608 certification for handling refrigerants. Local expertise is also vital; you want a team that understands how our coastal microclimates affect equipment life and who can navigate the complex San Francisco Department of Building Inspection (DBI) permitting process. To verify performance, you can use Best Pick Reports, which vets companies using an annual 6-step qualification process including independent customer surveys where a 4.0+ rating is required. Using a certified Best Pick contractor also provides you with a $2,500 guarantee on labor, giving you an extra layer of protection if the project doesn't go as planned.