The ECU3™ bundle contains the ECU3 No. 30RV29, Mobile Platform No. 11M550, Tow Cart No. 11M549 for a negative air machine (NAM), and box of disposable envelopes.Use an environmental containment units (ECU) like this one as a portable, reusable system to help keep particulates out of the air in a healtcare facility during construction or maintenance, or provide temporary isolation in a public health emergency.Modular capability lets 2 people on ladders work side-by-side to create a larger containment space. Lightweight, easy-clean external frame collapses for storage and transport.The ECU3 No. 30RV29 is a large unit that has both ceiling cavity and wall access points, plus height adjustment controls. Flat floor truss allows easy access for carts, gurneys, beds, and wheelbarrows. Large, sturdy wheel housings with nonskid PU wheels simplify transporting the unit between job sites. Made with 2 negative air ports (12.5" round port and 3.5" HEPA vacuum port), 4 doors (2 narrow, 2 wide cargo), and two 14" x 40" clear window panels.