Are Ohio Hotels and Short-Term Rentals Required to Have CO Detectors?

Ohio's carbon monoxide detection requirements for hotels and short-term rentals are established by the Ohio Fire Code (OFC), codified at Ohio Administrative Code (OAC) §§ 1301:7-7-09(O) and 1301:7-7-11(C)(9). The 2017 Ohio Fire Code, effective December 15, 2017, introduced Section 915 for new buildings and Section 1103.9 for existing buildings, and both rules were amended into their current form effective January 5, 2019. They require CO detection in Group I-1, I-2, I-4 and R occupancies and in Group E classrooms, a list that puts hotels, motels and residential rental properties inside it, when specified triggering conditions exist at the property.

Ohio's requirement is condition-triggered, not a blanket mandate: CO detection is required in a sleeping unit or dwelling unit only when the unit or its building contains a fuel-burning appliance or fireplace, is served by a fuel-burning forced-air furnace, houses fuel-burning equipment in shared spaces, or has an attached private garage. Existing hotels and lodging properties were required to achieve compliance no later than January 1, 2019. Hotel licensing and fire safety inspections are governed by Ohio Revised Code Chapter 3731, enforced by the Ohio State Fire Marshal, whose annual hotel inspections cover fire code compliance including CO detection obligations.

Ohio's CO detection requirements apply to Group I-1, I-2, I-4 and R occupancies and to Group E classrooms under OFC § 915.1.1, and Group R is where hotels, motels, transient sleeping facilities and extended-stay properties sit. The existing-building paragraph, § 1103.9, names the same list.

Two different definitions of "hotel" are in play and they do not cover the same buildings. ORC § 3731.01(A)(1) defines a hotel for licensing purposes as a structure containing "more than five guestrooms" approved as transient sleeping rooms or extended stay dwelling units, so a five-room inn is outside Chapter 3731 and outside the State Fire Marshal's annual hotel inspection. It is not outside the fire code. The Ohio Fire Code asks what occupancy group the building falls in and whether a trigger condition exists, and a small lodging house answers those questions the same way a large one does. The practical difference is who turns up: a licensed hotel sees the Fire Marshal annually, and a sub-six-room property sees the local fire code official when something prompts it.

Short-term rental operators hosting guests in single-family homes or small multi-unit residential properties fall under Group R-2 or R-3 occupancy classifications and are equally subject to Ohio Fire Code CO detection requirements when triggering conditions apply. Ohio does not maintain a separate state statute specifically governing CO detection in STRs; local fire code officials are the primary enforcement authority for these smaller lodging operations.

Hotel operators in Ohio carry overlapping compliance obligations under both the Ohio Fire Code and the hotel licensing statute. Under ORC Chapter 3731, every Ohio hotel must maintain a valid annual license issued by the State Fire Marshal, and operators are responsible for ensuring the property meets all applicable fire code standards at each annual inspection (ORC § 3731.05).

Under OFC §§ 915 and 1103.9, hotel operators must determine whether their property meets any of the four CO trigger conditions. If a triggering condition exists, the operator must install compliant CO detection in all affected sleeping units and dwelling units before those units are occupied by guests. For new hotel construction or major renovation requiring commercial power, alarms must be hardwired to building wiring with battery backup and listed to UL 2034 (OFC § 915.4). In an existing building the battery allowance is not conditional on anything, which is worth knowing because it is easy to read the other way. OFC § 1103.9 requires the alarms and then adds "except that the carbon monoxide alarms shall be allowed to be solely battery operated". An operator who fitted them late is on the same device as one who fitted them on time. CO detection systems are an acceptable alternative to stand-alone alarms, provided they comply with NFPA 720 and are listed to UL 2075 (OFC § 915.5).

All CO alarms and detection systems must be maintained in accordance with NFPA 720. Any alarm that becomes inoperable or begins producing end-of-life signals must be replaced without delay (OFC § 915.6). NFPA withdrew 720 as a separate standard and folded carbon monoxide into NFPA 72, which leaves several states pointing at a document that no longer moves. Ohio is not one of them by accident: its referenced standards rule, OAC 1301:7-7-80, pins "720-15" against §§ 915.5.1, 915.5.2 and 915.6, so the edition the Ohio code means is the 2015 one and it is still obtainable. Short-term rental hosts carry the same obligation under local fire code enforcement: assess whether triggering conditions exist, install compliant devices, and maintain operational status for each guest stay. Installing CO detectors is considered best practice for STR hosts even where no trigger condition formally applies.

The Ohio Fire Code specifies both equipment standards and precise placement locations for CO detection.

For sleeping units (hotel rooms and transient lodging): CO detection must be installed within each sleeping unit (OFC § 915.2.2). One exception applies, if the sleeping unit and its attached bathroom contain no fuel-burning appliance and are not served by a forced-air furnace, the device may be installed outside the sleeping unit in the immediate vicinity of the room.

For dwelling units (extended-stay hotels and short-term rentals): detection must be installed outside each separate sleeping area in the immediate vicinity of the bedrooms (OFC § 915.2.1). If a fuel-burning appliance is located within a bedroom or its attached bathroom, the device must be placed inside that bedroom.

New buildings require hardwired alarms with battery backup; battery-only devices are not permitted where commercial power is available (OFC § 915.4.1). In an existing building § 1103.9 allows solely battery-operated alarms, and it allows them outright rather than as a reward for having met the deadline. All alarms must be listed to UL 2034; CO detection systems must comply with NFPA 720 and be listed to UL 2075.

One scoping point sits above all of this and it favours the guest. Chapter 11 of the Ohio Fire Code normally reaches an existing building only where Table 1103.1 says so, but paragraph (C)(1)(1101.1) carries an exception in the opposite direction: the carbon monoxide paragraph "shall apply to all existing occupancies identified in" it. So the retrofit duty does not depend on a building's height, its occupant load or any other threshold in that table, only on being one of the occupancies the paragraph names and meeting a trigger.

Primary enforcement authority for hotel CO detection compliance rests with the Ohio State Fire Marshal. Under ORC § 3731.05, the Fire Marshal conducts annual inspections of licensed hotels and may require property alterations or corrections to achieve compliance with fire code standards. The Fire Marshal may issue formal citations under ORC § 3731.07 and may initiate license suspension or revocation proceedings under ORC § 3731.06 when violations persist or constitute a safety hazard.

For short-term rentals and other lodging operations outside the ORC Chapter 3731 licensing framework, local fire code officials serve as the primary enforcement authority. Guests who identify missing or inoperable CO detectors may report the concern to the property operator directly; unresolved issues may be escalated to the local fire authority or to the Ohio Division of State Fire Marshal.

Under ORC § 3731.99, any person who violates ORC § 3731.03 (hotel licensing) or § 3731.05 (compliance with fire safety inspection requirements) is guilty of a misdemeanor of the first degree. Beyond criminal exposure, the State Fire Marshal may suspend or revoke a hotel's operating license under ORC § 3731.06, which can require the property to cease operations until all violations are corrected. License revocation also restricts the operator from reopening the facility under its existing use classification without satisfying all outstanding code requirements. For short-term rental operators, penalties are assessed through local fire and building code enforcement processes, which vary by municipality.