About

More air, system-wide. Without a new furnace, AC or ductwork.

MaxSeal specializes in getting more airflow out of the HVAC system you already own, by sealing your ducts from the inside. We repair a home's ducts in less than a day with Aeroseal's patented, non-invasive sealing technology, for homes and small commercial buildings across the Bay Area.

Measured, not promised: across 88 MaxSeal jobs, the median home gained 31% more air. We measure every register before and after, the same visit, and every customer gets a Certificate of Completion showing the results room by room.

Services: duct leakage testing (HERS-equivalent methods), room-by-room airflow measurement, duct repair, Aeroseal duct sealing, duct cleaning, dryer and bathroom exhaust duct cleaning, airflow balancing and dampers.

For the trade: we work as the Aeroseal subcontractor for HVAC, insulation and solar contractors, HERS testers, general contractors and realtors. We're a subcontractor, not a competitor: we never sell equipment, never market to your customer, and never certify our own compliance work. Trade pricing available.

Certified Aeroseal dealer. C-20 licensed California contractor. DIR registered for public works. 10-year warranty on every seal, plus a guaranteed HERS duct leakage pass.

Comfort you can feel. Results you can measure.