AED Requirements and Cabinet Placement

Maybe you saw an AED symbol on a life safety plan and need to know what it commits you to buy. Maybe a tenant, an insurer, or a fire marshal asked whether your building needs one. Or maybe you already have an AED sitting in a drawer and want it mounted where it will actually get used. This guide answers three questions in order: whether an AED is required where you are, where it should go, and how to choose and mount the wall cabinet that holds it.

One distinction runs through the whole guide, so it is worth stating up front: the AED is the device; the cabinet is the enclosure that protects it and makes it easy to find. We stock the US-made cabinets. The defibrillator itself, along with its pads and battery, is separate equipment you source from a medical supplier. Keeping those two things straight is the difference between a unit that is ready in an emergency and one nobody can locate.

There is no single national law requiring AEDs in most private commercial buildings. The federal Cardiac Arrest Survival Act of 2000 did two things: it directed the U.S. Department of Health and Human Services to establish guidelines for placing AEDs in federal buildings, and it created a limited, conditional Good Samaritan civil-liability protection for people who use an AED in good faith during a perceived emergency, and for the organizations that acquire them (subject to conditions such as maintenance and notifying local EMS, with state Good Samaritan laws often governing in practice). The statute expressly does not require an AED at any building. Whether one is mandated for your building comes from state law and, in some jurisdictions, a local ordinance or building-code amendment.

Those state requirements are a genuine patchwork, but they cluster around a few occupancy types. The settings most commonly covered across states include:

• Public schools, and school athletic events in particular
• Health and fitness clubs above a member or square-footage threshold
• Dental offices, and some other outpatient medical settings
• Certain assembly and large-occupancy places of public gathering
• State and other government-owned buildings

Beyond any mandate, many owners, employers, and insurers also choose to install AEDs voluntarily. So the practical answer to “do I need one?” is: check your state's AED statute and your local code first, and confirm the specifics with your Authority Having Jurisdiction.

Every rule about where an AED goes traces back to one medical fact. For the shockable heart rhythms an AED treats, survival falls by roughly 7 to 10 percent for every minute that defibrillation is delayed, according to the American Heart Association. In closely monitored settings where a shock reaches the patient within the first minute, survival rates above 90 percent have been reported — not a typical outcome for a random collapse, but a measure of how much those first minutes are worth. A device locked in a manager's office three corridors away does not help inside that window.

That is why placement rules are written around travel time, not just presence. A responder has to notice the emergency, go get the AED, and return — ideally within a few minutes. The San Diego travel limits above (300 feet to the nearest unit, 600 feet between units) are one jurisdiction's way of translating that few-minute target into distances a plan checker can measure. Whatever your local numbers, the design goal is the same: nobody should have to travel far to reach one.

Whether or not your jurisdiction dictates exact distances, the siting logic is consistent. Put AEDs where the clock is easiest to beat:

• Visible and central. Along the paths people already travel — main corridors, lobbies, near the primary entrance — not tucked inside a locked room. If it cannot be seen, it cannot be found in time.
• One reachable unit per area, and typically per floor. A multi-story building generally wants at least one on each level, sited so the walk from the most remote point stays short.
• Near higher-risk activity. Fitness areas, pools, large assembly spaces, and places with older or higher-exertion populations warrant closer coverage.
• Signed so it reads from a distance. A wall or projecting (flag) AED sign lets someone spot the location from down the corridor. A cabinet with clear AED graphics and an alarm does the same job up close.

Two accessibility rules from the 2010 ADA Standards for Accessible Design shape how an AED and its cabinet get mounted, and one of them quietly determines which cabinet you can use in a corridor.

Once you know where the AED goes, four decisions get you to the right cabinet.

It is worth being explicit, because it trips people up on a purchase order. We supply the cabinet — the wall enclosure, its mounting, the alarm, and the AED graphics. The AED unit itself, and its consumables, come from a medical-device supplier:

If you already own the AED, you just need the cabinet. If you are starting from scratch, budget for both, and pair a cabinet whose interior fits the AED model you choose.

An AED is only useful if it works the one time it is needed, so readiness is an ongoing obligation, not a one-time install. The device carries most of that burden:

• Electrode pads and batteries carry printed expiration dates and must be replaced on their cycle — follow the dates on the components and the manufacturer’s manual rather than a generic interval.
• Most AEDs run automated self-tests and show a readiness indicator; a routine visual check that it reads ready catches a dead battery before an emergency does.
• The cabinet’s alarm has its own battery to keep an eye on, and the AED graphics and any location signage should stay visible and unobstructed.

Where AEDs are mandated, the governing law commonly makes maintenance a compliance obligation too, not just placement. San Diego's rule, for example, requires readiness checks and upkeep in line with the manufacturer's guidelines, the American Heart Association or American Red Cross, and FDA requirements; your jurisdiction may frame it differently. Even where an AED is voluntary, treating it like the life-safety equipment it is — on a calendar alongside your fire extinguisher inspections — is the point.