Carbon Monoxide Alarm Requirements for Minnesota Hotels and Short-Term Rentals

Minnesota requires carbon monoxide alarms in every sleeping room of every hotel and lodging house under Minn. Stat. § 299F.51, as amended by Laws 2023, Chapter 52, Article 5, effective August 1, 2024. The mandate is a blanket, per-room requirement, it applies regardless of whether fuel-burning appliances are present, and covers all existing hotels, not only new construction. A "hotel" under § 299F.50 is any building with six or more guest rooms rented for sleeping. A "lodging house" is a building with five or fewer such rooms. Both categories must have an approved CO alarm installed inside each sleeping room. A per-turnover replacement obligation requires owners to verify alarms are present and operational before each new occupancy begins. Short-term rental properties fall under the same lodging house definition when they have multiple rentable rooms. Enforcement falls to the Minnesota State Fire Marshal and, through lodging licensing, the Minnesota Department of Health.

Any building with one or more guest rooms rented for sleeping in Minnesota is covered under Minn. Stat. § 299F.51. Under § 299F.50, a "hotel" is a building with six or more guest rooms used for sleeping by guests. A "lodging house" is a building with five or fewer guest rooms where rent is paid for sleeping accommodations. Together, these definitions cover commercial transient lodging of every size. Minnesota has no statewide short-term rental licensing program, but STR properties that rent multiple rooms to guests qualify as lodging houses under § 299F.50 and are subject to the same per-room CO alarm obligation as full-service hotels. Single-room STR properties in owner-occupied homes were already subject to residential CO alarm requirements under § 299F.51 since the statute's original 2006 enactment.

Under Minn. Stat. § 299F.51, Subd. 2(b), the owner of a hotel or lodging house must provide and install one approved and operational CO alarm inside each room lawfully used for sleeping purposes. This is a blanket per-room requirement with no exception for rooms lacking fuel-burning appliances. In addition to initial installation, the statute imposes a per-turnover obligation: before the commencement of each new occupancy, the owner must replace any CO alarm that was stolen, removed, found missing, or rendered inoperable during the prior occupancy and has not been replaced by the prior occupant. This means owners bear responsibility for verifying CO alarm status at every guest checkout and correcting any deficiency before the next guest checks in.

Power source options for hotel and lodging house CO alarms are defined in § 299F.50, Subd. 8: the alarm must be hardwired into the building's electrical system, directly plugged into an electrical outlet without a switch, or battery-powered and attached to the wall. For existing hotels where the construction-era code did not require CO detection, battery-only installation is a compliant option. The alarm must be listed to Underwriters Laboratories Standard UL 2034 or equivalent, under § 299F.50, Subd. 5. No person may remove batteries from, or render inoperable, a required CO alarm under § 299F.51, Subd. 4.

Under Minn. Stat. § 299F.50, Subd. 5, all CO alarms must be approved, meaning certified by a nationally recognized testing laboratory to Underwriters Laboratories Standard UL 2034. Combination smoke and CO alarms meeting both UL 2034 and UL 217 are permitted. For hotel and lodging house properties, § 299F.51, Subd. 1(b) requires placement inside each sleeping room. This is a stricter standard than the residential rule, which permits placement within ten feet of the sleeping room and allows hallway installation; for hotels, the alarm must be in the room itself. Installation must follow manufacturer instructions. Power source options are hardwired, directly plugged into an unswitched outlet, or battery-powered and wall-mounted. The statute does not specify a mandatory testing interval or maintenance log requirement.

A second instrument reaches the same rooms and it is the weaker of the two, which is worth knowing before anyone quotes it at you. Minnesota Rules 7511.0915, the State Fire Code's version of Section 915, rewrites the model placement text: § 915.2.1 becomes "outside of each separate sleeping area within 10 feet of the bedrooms" for dwelling units, and § 915.2.2 keeps detection in sleeping units but allows it "outside of each separate sleeping area within 10 feet of the sleeping unit where the sleeping unit or its attached bedroom does not contain a fuel-burning appliance and is not served by a forced air furnace". Minnesota also adds an exception at § 915.1.1 letting alarms in multifamily dwellings sit between 15 and 25 feet of carbon monoxide producing central fixtures where a centralised alarm system lets responsible parties hear them at all times.

None of that helps a hotel. The code's exceptions are conditional and § 299F.51 subd. 1(b) is not: it requires an alarm in each room lawfully used for sleeping with no trigger and no exception at all. Where an unconditional statute and a conditional code overlap, the statute is what an operator has to satisfy. The ten-foot exception belongs to the dwelling side of Minnesota's law and does not travel to a guest room.

The Minnesota State Fire Marshal enforces CO alarm compliance in hotels under Minn. Stat. § 299F.46, which requires the Commissioner of Public Safety to inspect every hotel at least once every three years. The 2023 amendment to § 299F.51 incorporated CO alarm requirements into these triennial inspections. The Minnesota Department of Health licenses hotels and lodging establishments under Minn. Stat. Chapter 157, conducting risk-based inspections ranging from annual to biennial, and fire protection standards including CO alarms are incorporated by reference through Minn. R. 4625.2000. Local fire departments may conduct hotel inspections under contract with the State Fire Marshal. Minnesota has no routine state inspection program for short-term rental properties.

Under Minn. Stat. § 299F.51, Subd. 6, a first violation of the hotel CO alarm requirement results in a safety warning only, no fine and no criminal charge. A second or subsequent violation is a petty misdemeanor, which under Minn. Stat. § 609.02, Subd. 4a is not a crime and carries a maximum fine of $300 with no possibility of imprisonment. Separately, the Minnesota Department of Health may revoke or suspend a lodging establishment license under Chapter 157 for violations of applicable fire protection rules incorporated through Minn. R. 4625.2000, which represents a more significant operational consequence than the statutory fine.