Title 24 Requirements for Industrial Buildings

Process is a regulated component in its own right

Covered process sits alongside lighting, mechanical systems, the envelope, water heating, ventilation and electrical power distribution in the list of components the Energy Code regulates. It is documented on the process-systems forms — NRCC-PRC for compliance, NRCI-PRC for installation — rather than inside the mechanical set.

For a manufacturing or processing building that is frequently the largest part of the submittal, and it is the part least familiar to teams whose experience is in offices and retail.

Conditioned area is often the minority

Much of an industrial floor plate is unconditioned, and envelope requirements written around a thermal boundary apply where one exists. Conditioning part of a previously unconditioned building is newly conditioned floor area, treated as an addition, which brings the enclosing surfaces into scope for the first time.

Comfort conditioning versus process conditioning

These are not the same thing and the distinction matters for documentation. A space cooled to keep people comfortable is conditioned space. A space held at a condition to protect what is happening inside it is closer to process, and Section 100.1 defines a process space as one thermostatically controlled below 55 degrees F or above 90 degrees F for the whole space the system serves. Section 120.2(e) has no process exception of its own: a zone that must run around the clock relies on Exception 1, an area that must operate continuously, shown to the enforcing agency.

Lighting at industrial scale

High-bay production areas, storage, circulation and an office block each carry their own lighting power density. Warehouse areas, corridors and stairwells, and loading and unloading areas are all named for occupant sensing controls, so a substantial part of an industrial site requires automatic sensing rather than switching.

Where to start

By separating the building into conditioned space, unconditioned space and process. Those three categories determine which forms apply, and getting them wrong at the outset is the one error that is expensive to unwind later.

Where to go deeper

Most of what matters in an industrial building is covered process rather than comfort. The covered process section lists all seven subsections, and the ones that most often apply here are compressed air systems and process boilers. Both are documented on NRCC-PRC.

Common Title 24 Questions

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2. Title 24 requirements for retail stores
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6. Title 24 requirements for grocery stores

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