Dryer Vent Cleaning & Inspection in San Francisco

## Residential Dryer Exhaust Cleaning and Inspection, San Francisco (94116) A technician from Dryer Vent Specialists completed a full dryer exhaust cleaning and safety inspection at a single-family residence in San Francisco's 94116 zip code. The setup featured a single dryer installed in the garage with an exposed duct run, which is a favorable configuration that allows for straightforward visual inspection along the entire exhaust path. Because the duct was not concealed within construction, the technician was able to confirm routing, duct material, joint integrity, and support intervals without opening any walls. The dryer fan exhausted directly through the external garage wall, keeping the overall duct run short and limiting the number of elbows required. This type of installation typically stays well within the IRC M1502.4.6.1 maximum equivalent length of 35 feet, even after accounting for any elbow deductions per Table M1502.4.6.1. The exposed duct also made it easy to verify that the exhaust system remains independent of all other building systems, as required by IRC M1502.2, and that the termination point vents to the outside rather than into any enclosed space. During the cleaning, the technician used rotary brush equipment to clear lint accumulation from the full length of the duct interior, from the transition duct connection behind the dryer through to the exterior termination cap. The exterior cap was inspected to confirm the backdraft damper opens freely during operation and closes fully at rest, which prevents conditioned air loss and pest intrusion. Duct joints were checked for proper mechanical fastening, and the transition duct connecting the dryer to the rigid exhaust run was verified to be a single listed length no greater than 8 feet, in accordance with IRC M1502.4.3. Following the cleaning, the duct interior was confirmed to be free of significant lint buildup, and airflow was restored to normal operating levels. The accessible, exposed configuration of this garage installation is a practical advantage for ongoing maintenance, as annual or biannual cleaning can be performed quickly and thoroughly. Homeowners with this type of setup are encouraged to maintain a regular cleaning schedule, as lint accumulation is the leading contributing factor in residential dryer fires according to the U.S. Fire Administration.