Under ANSI/ISEA Z308.1-2021, a Type I first aid kit is built for stationary, indoor settings and typically shipped without a carrying handle, while a Type II first aid kit is the indoor portable variant, equipped with a carrying handle for movement between rooms [S1][S4].
Both types share the same indoor, low-rough-handling assumption; the split is mechanical, around mounting, portability, and the kit's ability to survive being carried, not around what is inside [S4]. The choice between them is therefore driven by facility layout, not hazard class.
Where Type I and Type II fit under ANSI/ISEA Z308.1-2021
ANSI/ISEA Z308.1-2021 organizes workplace first aid kits on two independent axes: Class A vs Class B governs contents and quantities, while Type I, II, III, IV governs the container's mounting, portability, water resistance, and impact/corrosion resistance [S1][S2][S5]. A Class A kit in a Type I cabinet and a Class B kit in a Type II pouch are both valid configurations under the same standard.
Type I is defined as "intended for use in stationary, indoor applications where kit contents have minimal potential for damage due to environmental factors and rough handling," and "should have a means for mounting in a fixed position" [S4]. Type II is defined for the same indoor, low-damage-risk assumption, but adds that the kit "should be equipped with a carrying handle" [S4]. Type III and IV are out of scope for an indoor comparison because they add water resistance (Type III) or full impact and corrosion resistance (Type IV) for outdoor and mobile-industry use [S2][S4].
Decision criteria: mounting, portability, and damage exposure
The first decision criterion is whether the kit will live in one place. Type I cabinets are built around fixed mounting, commonly specified for general indoor use, office use, or use in a manufacturing facility, and first aid cabinets generally fall into this type [S4]. If the kit is going on a wall in a corridor, behind a reception desk, or in a fixed break-room location, Type I is the default selection [S1][S3].
The second decision criterion is whether trained responders need to bring supplies to the casualty. Type II kits are described as "compact and easy to transport" for portable use indoors, intended for applications where the potential for damage from environmental factors and rough handling is still minimal [S2][S4]. A retail floor, restaurant, salon, or multi-room office where the responder walks to the patient, rather than the patient walking to a fixed cabinet, is the textbook fit [S2][S3].
The third decision criterion is environmental exposure. Both types assume minimal exposure to moisture, impact, and corrosion, so neither is the right call for a loading dock, a vehicle, an agriculture site, or an oil and gas field, where Type III or Type IV is the correct specification [S2][S3][S4]. Selecting Type I or Type II in a wet, high-impact environment would put the supplies themselves at risk even if the cabinet looks intact.
Side-by-side comparison: Type I vs Type II on the four spec axes
On the four axes the standard uses to classify containers, the two indoor types line up as follows, all drawn from the ANSI/ISEA Z308.1-2021 definitions in [S4] and the Type I/Type II summaries in [S1][S2][S5]:
Portability: Type I is not intended to be portable; Type II is intended for portable indoor use. Mounting: Type I should have a means for mounting in a fixed position; Type II has no fixed-mount requirement and instead should be equipped with a carrying handle. Water resistance: neither type requires a water-resistant seal; that requirement first appears at Type III. Impact and corrosion resistance: both are rated for minimal risk of damage from environmental factors and rough handling; the significant impact and corrosion resistance rating is reserved for Type IV. Typical applications: Type I is specified for general indoor use, office, and manufacturing-facility walls, often as a cabinet; Type II is specified for general indoor use, offices, or manufacturing environments where the kit must be carried [S4].
How to match Type I and Type II to Class A and Class B contents
Class and Type compose independently. A Class A kit, intended for less hazardous environments such as offices, retail stores, or schools, contains the minimum assortment in ANSI/ISEA Z308.1-2021 Table 1, including adhesive bandages, adhesive tape, antibiotic application, antiseptic, breathing barrier, burn dressing, burn treatment, cold pack, eye covering, first aid guide, hand sanitizer, medical exam gloves, eye/skin wash, roller bandage, scissors, sterile pads, trauma pads, and triangular bandages [S2][S8]. A Class B kit contains all of those supplies in larger quantities plus a splint and a tourniquet, and is built for higher-risk workplaces such as construction sites, manufacturing plants, and warehouses [S2][S8].
The container type does not change the supply list; it changes how those supplies are housed. A small office under 25 people with a single wall-mounted cabinet typically pairs a Class A kit inside a Type I container; a 100-plus-employee facility with multiple work zones commonly pairs Class B kits inside Type II containers so responders can carry the larger load to the casualty [S2]. On the facility side, the same standard recommends a kit on every level of a multi-floor building, which usually means a mix: Type I cabinets on each floor for general access, with Type II grab-and-go kits staged for trained response teams [S2].
Regulatory anchor: OSHA 29 CFR 1910.151 and Z308.1 as the reference
OSHA's medical services and first aid regulation at 29 CFR 1910.151(b) requires that "in the absence of an infirmary, clinic, or hospital in near proximity to the workplace which is used for the treatment of all injured employees, a person or persons shall be adequately trained to render first aid" and that "adequate first aid supplies shall be readily available" [S4]. The nonmandatory Appendix A to 29 CFR 1910.151 historically referred to ANSI Z308.1 as the consensus standard for those supplies—specifically citing Z308.1-1998—and Z308.1-2021 is the current revision of the standard [S1][S4][S5].
For an indoor facility, the practical compliance path is to specify ANSI/ISEA Z308.1-2021 compliance on both the class (A or B, based on a workplace hazard assessment) and the container type (I for fixed mounts, II for portable indoor response) [S1][S2][S5]. The standard also expects each kit to be supplemented based on the unique work environment and the recommendations of a person competent in first aid, so a Type I cabinet in a chemical-handling area should still have eye/skin wash and burn dressings added beyond the bare minimum, regardless of class [S1][S4].
Inspection cadence and lifecycle signals
ANSI/ISEA Z308.1-2021 also drives inspection behavior, not just purchasing. The standard recommends monthly inspections to check for expired items and to replenish used supplies, an inspection after every incident in which supplies were used, and a written log of inspection and restocking dates [S2]. This is the same cadence that should be applied to both Type I wall cabinets and Type II portable kits, because both share the same indoor, low-damage environment.
Operationally, that means a Type II portable kit, which is being carried, opened, and resealed more often than a wall-mounted Type I cabinet, will burn through its inspection cycles faster, even though both are rated for the same indoor risk profile. Stocking a few extra Class A refill modules on site is the cheapest way to keep a Type II kit inspection-ready without taking it out of service. For an in-depth look at how a stationary indoor first aid cabinet is laid out against Z308.1-2021, the linked reference walks the same Type I container classification in more detail. For facilities that are also wiring in fixed gas detection for indoor process areas, the container type decision is independent of detector type but should be made on the same hazard assessment.
Three trackable signals confirm an indoor kit program is in spec: the cabinet or pouch carries a printed Z308.1-2021 class and type marking; the inspection log shows entries within the past 30 days; and the contents reconcile to the Class A or Class B minimum quantities in Table 1 of the standard, with environmental supplements documented [S1][S2][S4]. When any one of those three is missing, the indoor kit program is out of compliance with the same ANSI/ISEA Z308.1-2021 framework that defines the Type I vs Type II split.
The underlying component specifications are covered under dry type transformer.
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