/ Field knowledge - IMC 502.6

A ceiling fan over a Type II plant is not 502.6.

Type II dry-cleaning rooms and Type IV/V loading doors have different exhaust tests. The 2024 model IMC specifies both a Type II room rate and a Type IV/V door velocity or precise hood alternative.

Educational 2024 model IMC 502.6.1-502.6.3. Confirm the locally adopted edition and equipment listing. This is a field screen, not a dry-cleaning plant design. Packets: English PDF and Spanish PDF.

Type II: mechanical exhaust at least 1 cfm per square foot in each dry-cleaning and drying room. The system operates automatically with the dry-cleaning equipment and has manual controls at an approved location.
Type IV/V, door route: automatically activated exhaust maintains at least 100 feet per minute through the loading door while it is open.
Type IV/V, hood exception: an exhaust hood immediately outside and above the loading door operates at Q = 100 x loading-door area in square feet, in cfm. A 3-square-foot door needs at least 300 cfm at that hood.
Capture and exhaust solvent vapors from spotting, scouring, brushing and related operations under 502.6.3. Verify the actual discharge and other process requirements separately.

On the set, identify machine type, each Type II room area and delivered cfm, automatic/manual controls, or the Type IV/V open-door velocity or hood location, door area and delivered flow. A generic ceiling fan or room label does not answer those questions.

What to send

Machine cut sheet, room and loading-door dimensions, delivered airflow, hood position and operating-control sequence.

Check the actual machine and exhaust route

MasterBuild can review those facts under a written scope against the adopted requirements.

Send Project Background

Educational model-code summary only; no project-specific approval or permit outcome is implied.