IMC · 2021 International Mechanical Code

§306.1 · Access

Effective in IMC 2021 · IMC 2024 SE Wisconsin · IMC 2024 NW Indiana.

Plain-English explainer

306.1 says equipment must remain accessible for inspection, service, and replacement without removing permanent construction. The drafter cites this when a finished wall, ceiling, or built-in would otherwise "lock in" a coil or filter.

Why inspectors flag this

Access failures are one of the top reasons an inspector flags a final; the drafter lifts this rule when the photo shows a furnace tucked behind a built-in so the contractor can move it before the rough-in walk-through.

As quoted in the code: Equipment must remain accessible for inspection, service, and replacement without removing permanent construction.

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