- Webber EMI manufactures specialized emission testing equipment for the automotive industry, including variable-volume, variable-temperature, micro-, mini- and vehicle-SHEDs; ORVR- and Running Loss-SHEDs; fuel drain & conditioning carts; sample conditioning baths and chillers; fixed- & proportional speed fans; stainless steel ducting & dilution tunnels, and; various other emissi ...webberemi.com