From the Fire Service, Inc. Facebook page:
Congratulations to the City of Chicago Fire Department on their delivery of 2 2016 Custom-Built Ford F550 air trucks. We thank you for your continued business.

New air mask service trucks for Chicago. Fire Service, Inc. photo

Fire Service, Inc. photo

Fire Service, Inc. photo

Fire Service, Inc. photo

Fire Service, Inc. photo

Fire Service, Inc. photo

Fire Service, Inc. photo
thanks Danny
#1 by mm on February 16, 2016 - 9:33 PM
I’m rather curious as to what the red piece of metal is covering on the middle front of the box.
#2 by Joe on February 13, 2016 - 10:12 AM
I have no firsthand knowledge and know literally nothing about this situation or these specific apparatus. That said, I’m guessing the reason they’re on a smaller chassis and the reason they’re not black over red is the same reason most things happen on fire departments and within government services (especially in Chicago right now): money.
#3 by David on February 13, 2016 - 6:55 AM
Anybody knows the reason they put them on this smaller chassis, also the red roof ‘s really unusual.
#4 by Chris S on February 12, 2016 - 10:10 PM
Look closer, they have sirens on both sides.
No black over red?
It looks like something is covered up under the center light on the front of the body/box
#5 by Robert on February 13, 2016 - 4:57 PM
I missed that. Thanks for point it out. On my phone its harder to see.
#6 by John on February 12, 2016 - 9:23 PM
Good eye sir, good eye
#7 by Robert on February 12, 2016 - 5:26 PM
Anyone else notice the siren being placed on one side of one then the opposite of the other one?