The Envirco® MAC 10 fan filter unit, was the first (FFU) to combine low sound, low watts and a low profile. Measuring only 51 dBA, the MAC 10 Original Standard (2 ft x 4 ft [600 mm x 1,210 mm]) provides one of the lowest sound levels of any FFU in the industry. Running at only 310 watts @ 90 fpm, the unit uses less energy than traditional FFUs, lowering operating costs. The MAC 10 Original maintains a low profile, measuring less than 13" (330 mm).