No mention of installed CO detection.

Cedar Rapids Fire Department 

CRFD and CRPD Respond to Possible Carbon Monoxide Leaks at Motel 6 on SW side –
FOR IMMEDIATE RELEASE
(July 08, 2023 – 3:10p.m.)
Cedar Rapids, IA –
Cedar Rapids Police and Cedar Rapids Firefighters responded to multiple calls for service regarding potential gas or vapor exposure at Motel 6 – 616 33rd Ave SW on Saturday. The first call came at 10:14a.m., the second at 1:44p.m.
The first call ended when utility crews indicated they had secured what they believed to be the source of the exposure and rectified the issue. A few hours later, guests at the hotel began complaining of symptoms in-line with gas exposure and the fire department was called again to respond. At this point, firefighters evacuated the building and began a room-by-room search ensuring all residents were safely moved. Other fire crews searched for the source of the leak and ventilated the building. Utility crews – at the time of the posting – are working to locate the source of the exposure and mitigate the issue. At this time, it is not known now how long guests will be displaced.
One patient was evaluated by Area Ambulance crews but did not require further treatment or transport to medical care. No firefighter injuries are reported in this event.
The cause of the exposure is still under investigation.
“A clogged lint trap was discovered in a dryer in the building’s laundry room, which was blocking carbon monoxide produced by the machine from leaving through the exhaust pipe and instead was leaking into the laundry room.”