AC Infinity AIRTAP T4 Register Booster Fan

Looking to boost airflow from your central heating and air conditioning? This AC Infinity AIRTAP T4 register booster fan is designed to quietly increase airflow. It fits a 4 x 10 inch register hole. Key features: - Dual 92mm engine - Airflow of 120 CFM - Noise level of 18 dBA - Programmable to respond to heat and cool temperatures - Ten speeds from silent to powerful - High precision thermal probe - Power failure backup memory