AP181 Traditional computer fans are made to expel air, so for years, airflow was the most important rating that determines cooling efficiency as most fans are used as exhausts. However, with positive pressure gaining importance in computer cooling technology, SilverStone created Air Penetrator fan specifically designed for intake fan applications, where airflow rating is not a priority. The design goal for Air Penetrator is to focus airflow into a column that can be channeled through various obstacles inside the modern computer case for more efficient cooling performance. Compared with traditional fans, where airflow spreads outward and further looses focus with resistance added (e.g. filters, fan guards, etc…), Air Penetrator fan’s unique blade and grille designs can create enough pressure to push air as far as 1 meter away with minimal fan speed and noise. This unmatched efficiency makes Air Penetrator ideal not only as intake case fan, but also perfect for high density heatsinks and radiators. Special Feature Industry leading air channeling fan Wide fan blades for reducing air resistance Integrated air channeling grille double as fan guard to reduce overall size Low power consumption Specifications Model No. SST-AP181 Color Black BEARING Sleeve RATED VOLTAGE 12V DC START VOLTAGE 10.8V DC (in low rpm mode) RATED CURRENT 0.45 AMP RATED POWER 5.4W SPEED 700 ; 1200 rpm Effective airflow range 1.2 ; 3 Meter AIRFLOW 80 ~ 130 CFM STATIC PRESSURE Max 1.1~2.45mmH2O Air flow 1.9m/s ; 3.1m/s (measured at fan exit) NOISE LEVEL 18 / 34dB(A) DIMENSION 180mm (L) x 180mm (W) x 32mm (H)