CO Detection in Hawaii Hotels and Transient Vacation Units

Hawaii has no carbon monoxide statute. The requirement reaches a hotel through the building code, and the chain has three links a reader can check.

HRS 107-25 establishes the Hawaii state building codes "applicable to all construction in the State of Hawaii" and bases them on the International Building Code among other standards. The State Building Code Council adopted the 2018 edition of that code on 20 April 2021, with errata and addenda approved on 17 August 2021, and its adoption clause takes in all parts of the code subject to the Council's own listed amendments. Those amendments run through scope, appendices, storm shelters, hurricane protection areas, sprinklers, egress and the structural chapters, and none of them touches Section 915. So the model text applies: carbon monoxide detection in Group I-1, I-2, I-4 and R occupancies, with Section 310.2 placing transient hotels and motels in Group R-1.

Which edition the Council adopted was the whole question. Carbon monoxide provisions entered the International Building Code partway through its history, and a state that adopted an older edition would have adopted a code with no carbon monoxide section at all. The 2018 edition has one.

Group R-1 covers occupancies with sleeping units where the occupants are primarily transient, which puts hotels and motels inside the code. Coverage of a particular guest room then turns on four conditions in Sections 915.1.2 through 915.1.5, and each names sleeping units alongside dwelling units:

• The unit contains a fuel-burning appliance or a fuel-burning fireplace.
• A fuel-burning forced-air furnace serves it.
• A fuel-burning appliance sits elsewhere in the building with a communicating opening to the unit.
• An attached private garage adjoins it.

Then comes the part specific to Hawaii, and it is a question about geography rather than about the building. HRS 107-28(a) requires the governing body of each county to amend and adopt the state building codes for its own jurisdiction within two years of the state adoption. Under HRS 107-28(b), a county that has not done so gets the state codes as an interim county building code. No island is left without one, but the document an operator is handed differs by county, and a county may amend what it adopts.

Start by finding out which county document governs your property, then work the four triggers against your guest rooms. On Oahu the answer is settled and it goes further than the state floor.

The City and County of Honolulu adopts the state building code of 20 April 2021 and its 2018 International Building Code at ROH 16-1.1, and its amendment to Section 915.1 keeps carbon monoxide detection for new buildings while adding a trigger the state text does not have. Where the valuation of an addition, alteration or repair to existing dwelling and sleeping units exceeds the threshold in ROH Chapter 18 and a permit is required, or where one or more sleeping units are added or created, carbon monoxide alarms go in at the placement required by Section 915.2 and to the installation standard in Section 915.4. Renovation work at a Honolulu hotel can therefore pull existing guest rooms into the requirement on the strength of its budget.

Honolulu runs a second and stricter scheme for the short-term rental market. Under its transient vacation unit and bed and breakfast framework, the owner or operator must provide carbon monoxide detectors in each transient occupant bedroom and in each hallway connected to one where the covered fuel-powered conditions are present. That is a per-bedroom rule rather than a per-trigger rule, and it applies to the registered short-term rental rather than to the hotel.

An operator on Maui, Kauai or Hawaii island should read their own county ordinance rather than Honolulu's. The state floor reaches them under HRS 107-28, but the local amendments sitting on top of it were not examined for this page and can differ.

Placement and equipment come from Section 915 of the 2018 International Building Code as adopted, since the Council left the section unamended. Detection belongs in the guest rooms themselves, which the section calls sleeping units, wherever one of the four triggers applies.

Honolulu's amendment adds the specifications a retrofit follows. Where the permit-value trigger at ROH 16-1.1 catches existing work, alarms are placed under Section 915.2 and installed under Section 915.4, with the amendment listing its own exceptions. Two of those are worth knowing before budgeting a refurbishment: battery-operated alarms are permitted where the code in effect at the time of construction did not require carbon monoxide detectors, and a carbon monoxide detection system complying with Section 915.5 is an acceptable alternative to individual alarms.

For a larger property the system route usually costs less to maintain than alarms counted room by room, and Honolulu names it as an acceptable alternative rather than leaving operators to argue for it.

Enforcement is county work throughout Hawaii. The building department of each county administers the adopted code, reviews permits and inspects, which is the consequence of HRS 107-28 handing adoption to the counties. On Oahu that is the Department of Planning and Permitting, which also handles registration and ordinance enforcement for transient vacation units and bed and breakfast homes.

The state layer sits above rather than beside this. The State Building Code Council adopts and amends the codes under HRS 107-24 and sets the floor; it does not inspect hotels. An operator with a question about their own building talks to the county.

Hawaii's state building code framework carries no carbon monoxide penalty schedule of its own, and the state record holds none. Consequences arrive through county enforcement instead: permit refusal, correction notices and the ordinary code-enforcement machinery of the county administering the building code, and on Oahu through the registration framework that governs transient vacation units and bed and breakfast homes.

For a short-term rental operator on Oahu that registration link is the sharper exposure. A property depending on registration to trade legally has more at risk in a compliance failure than the size of any fine, because the detector requirement sits inside the framework that keeps the registration valid.