Fogg Filler ( has made some improvements to its HEPA units, including increased fan output and easy system maintenance. 

The durable stainless steel construction, internal lighting, and variable speed drives on the blowers remains constant.  Fogg’s HEPA units have always been designed to provide class 100 air or better to the filling environment.  With some improvements to the design, the HEPA units are more user friendly.  If the need to change out a blower arises it is easier than before; the design has evolved from two motors down to one.  A single motor means less to maintain while offering a higher static output than previous models.  The output has increased by 33% to ensure proper air exchange no matter what the conditions are.