The 1300 Series A2 Class II biological safety cabinet operates efficiently and offers safety and ergonomic benefits. Intelligent speed control automatically reduces blower speed to 30% when the window is closed. This technology extends HEPA filter life while ensuring a sterile working environment and saves energy to minimize operating costs. Noise output has also been reduced to <63 dB(A) (4 foot model). A simple-to-operate microprocessor control clearly displays essential operational, safety and service data.