Rapid Duct Testing has been working with contractors, homeowners and developers within Southern California for over a decade in providing superior HERS Testing (HERS Rating), Air Balancing, Hydronic Balancing, Building Envelope Leakage, Manual J, Manual D, Permit Services, Permit Retrieval, Expedited Permit Services, Self-Serve Portal, Educational Programs, Energy Upgrade California Rebate & other like services mandated by Title 24 - California Energy Commission.