CO Detection in Alaska Hotels, Lodges and Short-Term Rentals
Alaska lodges run on oil, and that decides where the detector sits in your room. The model code lets an operator put one alarm in the corridor instead of the guest room, but only where nothing fuel-burning stands in the room or its attached bathroom and no forced-air furnace serves it. Oil-fired central heating is ordinary from Ketchikan to Fairbanks, so the second condition fails across much of the state. Alaska hotel carbon monoxide detection arrives through 13 AAC 50.020, which adopts the 2021 International Building Code to regulate all occupancies and buildings. Its scope exception releases detached homes of three families or fewer and low townhouses, so a lodge or a roadhouse stays inside Section 915.
Last verified: August 24, 2026
Key Takeaways
- The scope exception carries the answer. 13 AAC 50.020 adopts the 2021 IBC in the regulation's own words to regulate all occupancies and buildings, and releases only detached one-, two- and three-family homes and townhouses of three stories or fewer. A hotel is a Group R-1 occupancy and sits well outside that carve-out.
- Alaska rewrites thirteen sections of the chapter that holds Section 915 and leaves Section 915 itself untouched.
- Section 915.2.2 governs sleeping units and asks for detection in the unit. Section 915.2.1, the corridor placement most state-law summaries quote, is written for dwelling units and answers an Alaskan flat rather than a guest room.
- A hotel already standing has its own route. 13 AAC 50.025 adopts the 2021 International Fire Code, Chapters 1 to 12, bringing Section 1103.9 with it, and 13 AAC 50.021 adopts the 2021 International Existing Building Code. Across the whole of 13 AAC 50 the numbers 915 and 1103 do not appear once, so neither adoption amends them.
- A detached cabin or house let to guests falls inside the scope exception and works from AS 18.70.095 and the residential code, where the duty runs to the landlord at each occupancy rather than through plan review.
- Much of Alaska has no local building official, so plan review runs through the Division of Fire and Life Safety under AS 18.70.080, with deferred jurisdictions reviewing their own. An operator outside an organised borough deals with the state rather than a city hall.
- Anchorage wrote its own section at Municipal Code 23.15.908.7, asking for an alarm on every floor level, but its occupancy list names Groups I-1, R-2, R-3 and R-4 and omits Group R-1, so an Anchorage hotel still takes its duty from the state rule. That text was read from a 2020 archive capture of amendments to the 2012 IBC, and the Assembly approved a building code update, AO 2026-33, on 14 April 2026.
Legal Summary
Alaska's carbon monoxide statute does not decide the hotel question. AS 18.70.095 is written around dwelling units and borrows its definition of a dwelling unit from AS 34.03.360 in the landlord-tenant act, which is a residential frame. Nothing in it settles what a lodge or motel owes its guests.
The building code does. Under 13 AAC 50.020 the state adopts the 2021 International Building Code, Chapters 1 to 12, 14 to 28 and 30 to 35, in the regulation's own words "to regulate all occupancies and buildings". The scope exception releases detached one-, two- and three-family homes and townhouses of three stories or fewer, and nothing else. A hotel is a Group R-1 occupancy and sits well outside that carve-out.
Chapter 9 of the adopted code carries Section 915. Alaska does rewrite that chapter, in thirteen places, and the list is worth seeing because it shows how deliberate the drafting is: 901.5, 903.2.3, 903.2.8, 903.3.6, 904.1, 906.1, 907.2.3 twice, 907.2.9, 907.2.11.5, 907.7.2, 907.8 and 909.18, all sprinklers, smoke alarms, acceptance-test paperwork and remote camps. Section 915 is not on it, so the carbon monoxide provision applies as published, requiring detection in Group R sleeping units on the fuel and garage conditions the model code sets.
A building that was already standing when the code arrived is a separate question with a separate answer, and Alaska has one. 13 AAC 50.025 adopts the 2021 International Fire Code, Chapters 1 to 12, which carries Chapter 11 and its retrofit provisions, and 13 AAC 50.021 adopts the 2021 International Existing Building Code on the same all-occupancies wording. Neither adoption touches the carbon monoxide sections: across the whole of 13 AAC 50 the numbers 915 and 1103 do not appear once.
Who Is Covered
Read the scope exception rather than the occupancy list, because in Alaska that is where the answer sits. The adopted code regulates all occupancies and buildings except detached homes of three families or fewer and low townhouses. A lodge, a motel, a hotel and a roadhouse letting rooms to transient guests are all outside the exception and inside the code.
Within that, a guest room needs detection where it contains a fuel-burning appliance, where a fuel-burning forced-air furnace serves it, where it sits in a building holding fuel-burning appliances with a communicating opening, or where an attached private garage adjoins it.
Alaska's building stock makes the second and third of those conditions more common than they are elsewhere. Oil-fired boilers and toyo stoves are ordinary heating equipment across much of the state, and a property running a central oil-fired system will find most of its rooms inside the requirement rather than at its edge.
A short-term rental in a detached house of three families or fewer falls into the scope exception and out of this code path. That host works from AS 18.70.095 and the residential code instead, which is a different rule with a dwelling-unit frame.
Knowing what that different rule asks for saves a search. AS 18.70.095 requires carbon monoxide detection devices in qualifying dwelling units, installed and maintained according to the manufacturer's recommendations, with the device including an alarm. Where the property is let on a residential tenancy rather than to transient guests, the statute puts the duty on the landlord at each occupancy to provide the devices in working condition and to repair or replace a deficient device after the tenant gives notice. A cabin host is closer to that arrangement than to the Group R-1 rules on the rest of this page.
One word in that sentence does the work, and it is the one a cabin host skips over. AS 18.70.095(d)(3) qualifies a dwelling unit on any one of three limbs: it contains or is serviced by a carbon-based-fueled appliance, it has an attached garage or carport, or it is adjacent to a parking space. Limb (C) turns on the parking space itself, with no requirement that it be covered or enclosed, so two marked stalls or a gravel turnaround beside an all-electric cabin brings the property inside the statute. What follows from that differs from the hotel case above. A detached cabin sits outside plan review and outside the fire-safety inspection that would catch a wrong call, so a host who files the property exempt learns otherwise at an incident or a claim instead of at a counter.
Hotels already standing: covered too. The Alaska requirement reaches an existing hotel and not only one being built.
Operator Responsibilities
Place detection inside the guest rooms. Section 915.2.2 states it in four words, "carbon monoxide detection shall be installed in sleeping units", and the corridor is the exception rather than the rule. That exception is available only where the guest room and its attached bathroom contain no fuel-burning appliance and the room is not served by a forced-air furnace. Both limbs have to hold. In Alaska the second limb is the one that bites: oil-fired forced-air heating is ordinary here, so a room with nothing burning inside it is still outside the exception whenever a central furnace serves it, and the detector belongs in the room.
Work the building rather than the room list first. Because Section 915 reaches units sharing a communicating opening with an appliance space, a boiler room, a laundry with gas dryers and a kitchen each generate a set of covered rooms around them. Mapping the appliances and then the openings is faster than surveying two hundred rooms one at a time, and it produces the same list.
Alaska adds a practical dimension most states do not. Properties on isolated or seasonal power supplies need to think about the power source at design stage rather than at inspection, since a device depending on building wiring behaves differently on a property running on generator supply for part of the year. Raise that with the plan reviewer rather than discovering it at commissioning.
Installation and Technical Requirements
The specification is the model text of Section 915 in the 2021 International Building Code, which Alaska leaves alone while rewriting thirteen of its neighbours in the same chapter. Section 915 draws a line most summaries lose. 915.2.1 is written for dwelling units, and asks for detection outside each separate sleeping area in the immediate vicinity of the bedrooms, with a device inside a bedroom that holds a fuel-burning appliance. 915.2.2 is written for sleeping units, which is what a guest room is, and asks for detection in the unit, with the outside-the-sleeping-area placement available only as an exception where the room and its attached bathroom hold no fuel-burning appliance and no forced-air furnace serves them. A lodge reading 915.2.1 and putting one device in the corridor has read the rule for flats.
Two model exceptions are worth knowing before ordering equipment. Where a fuel-burning forced-air furnace serves the units, detection is not required in them if a detector sits in the first room or area served by each main duct leaving the furnace and the alarm signals transmit automatically to an approved location. Where the appliance sits outside the units, detection is not required where there is no communicating opening, or where a detector is placed between the appliance and the unit, or on the ceiling of the room holding the appliance.
For a larger lodge, Section 915 also permits a carbon monoxide detection system in place of individual alarms, which is usually the cheaper arrangement to maintain across a property where rooms are closed for part of the year.
Enforcement
Plan review and enforcement run through the Division of Fire and Life Safety at the Department of Public Safety under AS 18.70.080, which is the authority the state exercises over building plans and fire safety across occupancies. Alaska's deferred jurisdictions handle their own review where the division has delegated it, so the office an operator deals with depends on where the property stands.
For lodging, the contact point matters more here than in states with a building department in every municipality. Much of Alaska has no local building official, and the division's plan review function is what fills that space. An operator planning work outside an organised borough should expect to deal with the state rather than a city hall.
Penalties
Alaska treats violations related to the carbon monoxide duties in AS 18.70.095 as violations under AS 18.70.100(c). That statutory route is written around the dwelling-unit provision rather than around the building code, so it is an imperfect fit for a lodging property whose obligation comes from 13 AAC 50.020 and Section 915 instead.
What bites a hotel is the plan review and approval process. A project that cannot satisfy the Division of Fire and Life Safety does not proceed, and an existing property found deficient during a fire safety inspection receives a correction requirement rather than a fine schedule. Civil exposure after an incident sits behind both and does not depend on either.
Local Override Warning
Alaska's adopted building code applies statewide through 13 AAC 50.020, and municipalities with their own building departments administer it locally, some with amendments. Anchorage, Fairbanks and Juneau each run their own review processes. Outside organised boroughs, the state division is the authority. Confirm which office reviews your property and whether local amendments apply before treating the model text of Section 915 as the complete requirement.
Frequently Asked Questions
Are carbon monoxide detectors required in Alaska hotels?
Does the Alaska rule reach a hotel that was built years ago?
Does AS 18.70.095 cover hotel guest rooms?
Which Alaska guest rooms need detection?
Does an Alaska cabin or house rented to guests follow the hotel rule?
Who reviews and enforces this in Alaska?
Can a large Alaska lodge use a detection system instead of individual alarms?
Disclaimer: This page explains the law as it stood on August 24, 2026. It is general information, not legal advice, and reading it creates no attorney-client relationship. Requirements vary by city, county and building type, and statutes and codes are amended: confirm the current text with the issuing authority before acting on it. Each requirement here cites the instrument it comes from, so you can check it at source.
Sources and References
- Alaska Administrative Code 13 AAC 50.020, International Building Code , 13 AAC 50.020, adoption of the 2021 International Building Code Chapters 1 to 12, 14 to 28 and 30 to 35, with the scope exception
- Alaska Administrative Code 13 AAC 50.025 and 13 AAC 50.021, fire code and existing building code adoptions , 13 AAC 50.025 and 13 AAC 50.021 adoption clauses and revision lists
- AS 18.70.095, Carbon monoxide detection devices , 18.70.095(a) through (e)
- AS 18.70.080 and AS 18.70.100(c) , 18.70.080 plan review and fire safety authority; 18.70.100(c) treatment of violations
- Alaska Department of Public Safety, Division of Fire and Life Safety , State fire code program, plan review and deferred jurisdictions
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