I chose this product based on the reviews. I am sensitive to odors and chemicals and have allergic asthma. Silversmithing and soldering require more than good ventilation, fans and air cleaners!
Pros
3-STAGE FILTER - The smoke extractor has a 3-stage filter. Cotton filters, HEPA central filters and activated carbon filters absorb smoke, dust and harmful gases during operation. The wind deflector design allows more complete and uniform contact of harmful particles and gases with the filter wool and activated carbon filter material, improving the efficiency of the filter element. There really aren't any outliers.