Ductwork in Battery Rooms

For this battery room, what hydrogen dilution, exhaust rates, and spark-resistant requirements does code require?

I'm checking ductwork in battery rooms at [location]. I found ductwork in battery rooms for UPS or telecom systems to exhaust hydrogen gas. For this battery room, what hydrogen dilution, exhaust rates, and spark-resistant requirements does code require?

Grease Duct, Kitchen & Industrial Exhaust 3rd Year RED

Stop if

Hold point on ductwork in battery rooms: I have the location, photo, drawing/detail, and what was checked. Who should verify before this gets cut, covered, lifted, sealed, energized, or signed off?

Watch out

Don't treat battery room exhaust as standard. Don't ignore hydrogen dilution requirements.

Check

room/grid/area
photo of condition
drawing/detail
manufacturer/model if visible
what I already checked

Say this to your foreman

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