In episode 4 of Shark Tank's season 14, entrepreneur Winston Mok stepped into the Tank with high hopes for his smart air filtration system, Woosh.

Of the two systems, Woosh has a higher initial cost of $149, but then costs $22 per filter insert to replace. Filtrete has a lower initial cost of between $25 and $35 for two filters and the smart ...

Mark Cuban rejected Woosh smart air filtration system during episode 4 of Shark Tank season 14. Winston Mok sought $500,000 for 10% equity in his smart air filter business, which works with home ...