AC Infinity’s AIRTITAN S3 is a crawlspace ventilator for exhausting humid, stale air from basements, crawl spaces, attics, and garages. The AC-ATS3 package includes a 10‑speed corded controller and a sealed, IP55‑rated fan module built on a durable mounting frame. It uses a single 120 mm PWM‑controlled DC impeller to balance airflow and noise; rated performance is 120 CFM (≈204 m³/h) at 30 dBA with 5.4 mm‑H2O static pressure. The square face measures 9.01 × 9.01 × 1.57 in (22.9 × 22.9 × 4.0 cm) with a 5.11 in (13.0 cm) rear enclosure, and includes 8 ft power and 6 ft UIS leads. Designed for exhaust configuration, the S3 integrates with UIS controllers 63, 67 (via adapter), and 69, and carries a 50,000‑hour life expectancy.

