Mainstream Custom Airflow Systems has been a local, family-owned and operated company for over 30 years. We take great pride in designing and installing the ideal airflow system for your home with honesty, integrity, and professionalism. 

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Trained at the country's top trade school for heating, air conditioning, and refrigeration, Peter Sophos has been in the HVAC industry since 1983 and founded Mainstream in 1987. What began as a one-man operation in Oxnard, California soon became a thriving business servicing communities throughout Ventura and Los Angeles Counties, including Beverly Hills, Pacific Palisades, Santa Monica, Lake Sherwood, and North Ranch. 

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Mainstream is proud of our reputation for high-quality, professional work, particularly for completing difficult installations on time and on budget. Within the industry, Pete is recognized for his skill in engineering and designing duct systems and zoning for large, custom, and new-construction homes.

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Thank you for visiting our site. We look forward to helping with your HVAC needs.