Patent ID: 6979359

Claim:
A portable filter unit, comprising: a fan section mounted on a movable first cart, wherein the fan section comprises first and second opposite lateral ends, and wherein the fan section includes a fan and a motor operable for driving the fan to cause air to flow into the first lateral end or second lateral end and exit through the opposite first lateral end or second lateral end thereof; a filter section mounted on a second movable cart, wherein the filter section comprises third and fourth opposite lateral ends, and wherein the filter section includes a macroscopic dust prefilter, a HEPA filter, and a gas adsorbent filter, and the filter section is adapted to allow air to flow into the third lateral end or fourth lateral end and through the prefilter, HEPA filter, gas adsorbent filter, in that sequence, and opposite third lateral end or fourth lateral end thereof; wherein the fan section and filter section are adapted for making a releasably attachable interconnection of either of the opposite lateral ends of the fan section in abutting relationship with either of the opposite lateral ends of the filter section, and wherein airflow is caused to pass through the fan section and filter section when the motor drives the fan.