Until now, HEPA-14 filtration systems have been large and unwieldy, and there were no retrofit units on the market that would universally fit existing ambulances, transit vehicles, school buses, and crewed work trucks.
Until now, HEPA-14 filtration systems have been large and unwieldy, and there were no retrofit units on the market that would universally fit existing ambulances, transit vehicles, school buses, and crewed work trucks.