Source capture local exhaust ventilation units and systems, namely, source capture fume extraction units, source capture fume extraction systems, source capture particulate extraction units, source capture particulate extraction systems, source capture local air exhaust units, source capture local air exhaust systems, source capture fan-filter exhauster units, source capture fan-filter exhauster systems, single air extraction units and systems, central air extraction units and systems, all of the aforementioned units and systems comprising source capture fume extraction arms, source capture fume extraction hoods, source capture extraction hose, source capture fans, source capture industrial blowers, source capture dust collectors, source capture fume collectors and mist collectors; source capture air filtration and purifying units, namely, portable source capture air filtration and purifying units, wall mounted source capture air filtration and purifying units, and ceiling mounted source capture air filtration and purifying units; air filtration and purifying units and system accessories therefor, namely, air filters for commercial use, domestic use and for industrial use installations; source capture local exhaust ventilation technology and source capture local exhaust air extraction systems, namely, air purifying and air filtration apparatus for commercial, domestic, and industrial applications