This from Steve Redick:

2600 W 35th St. Heavy smoke conditions reported in a large, fire resistive warehouse occupancy… discovered to be an auto fire deep within the building. MVU 923 was used to pressurize the building and clear the residual smoke, seemed to be very effective. Also got several decent apparatus shots.
heavy smoke pours out of warehouse

Steve Redick photo

heavy smoke pours out of warehouse

Steve Redick photo

Chicago FD Truck 52

Steve Redick photo

Chicago FD MVU 923

Steve Redick photo

Chicago FD MVU 923

Steve Redick photo

Chicago FD Truck 33

Steve Redick photo

Chicago FD Comm Van 2-7-4

Steve Redick photo

Chicago FD Tower Ladder 5

Steve Redick photo

Chicago FD Engine 65

Steve Redick photo

firefighter tools

Steve Redick photo

Here’s a brief video of the MVU: