Atlas Heating & Ventilating Co., San Francisco, specializing in both residential & custom homes and commercial projects. We serve companies of all sizes, from individual proprietorships to major corporations and institutions in a variety of industries. Established in 1908, we are one of California's oldest and most respected heating and air conditioning companies. When Atlas installs your heater and air conditioner, you can be assured we will show up on time, complete the job on schedule, and leave your house clean. Your Warm Friend. Give us a call: 650-873-7000