20 CFM Through‑Wall Ventilation Fan, 18 in x 9 in Crawl Space Vent Fan with Humidity & Temperature Adjustment, Dual Knobs for Speed and Humidity Control, 120V, Ideal for Basement, Garage, Attic

Features

• Powerful 220 CFM Dual‑Fan Ventilation: High‑output dual‑fan system generates up to 220 CFM airflow to expel damp, stale air for even air exchange. Effectively cuts moisture, inhibits mold and dissipates indoor pollutants for crawl spaces, basements, garages, attics and laundry rooms. Works for both residential and light‑commercial spaces.
• Auto Humidity & Temperature Safety Controls: Adjustable humidity controller auto‑starts the fan when humidity goes above your preset level and shuts it off as moisture drops. Built‑in thermal protection stops operation below 35 °F and restarts near 55 °F to extend unit service life.
• Energy‑Saving & Quiet Running: Only 12W low power draw supports long‑term continuous operation. Operates under 52 dB to deliver steady ventilation without loud noise disturbance.
• Easy Through‑Wall Setup: Comes with mounting hardware for simple installation into standard wall vent openings or existing ventilation cutouts. Great upgrade for locations with blocked eaves or limited floor access.
• Reliable All‑Purpose Air Circulation: Stabilizes indoor air pressure and safeguards building structural components. Integrated control panel lets you tailor airflow, maintaining balanced, healthier indoor air in moisture‑prone enclosed and semi‑enclosed areas.