What should the working drawing record?
Illustrative example. Replace the prompts with approved project data and identify unresolved items for the responsible discipline.
| Topic | Input or evidence | Review owner |
|---|---|---|
| Flow | Required airflow and operating condition | Genset data |
| Opening | Gross size and free area | Louver data |
| Restriction | Pressure drop at the design point | Supplier curve |
| Weather | Rain, insect and environmental controls | Project brief |
What does the source support?
The Cummins application manual treats ventilation as a system of air supply and heat and fume removal. A gross opening area alone does not prove performance.
Sources: Cummins: Application Manual: Liquid Cooled Generator Sets, ventilation chapter
What remains an engineering decision?
Cooling, acoustic, structural, fire, fuel and electrical compliance require qualified project review. Only the registered engineer responsible for the job performs engineering sign-off.
Common questions
What else should the bid team know?
Does this guide approve an enclosure design?
No. It is a coordination framework for approved inputs and specialist review.
Can a value be copied from another generator?
No. Use the selected equipment and project design basis.
Who signs off the engineering?
Only the registered engineer responsible for the job.
Primary sources
- Application Manual: Liquid Cooled Generator Sets, ventilation chapterCummins
- Ambient Capability of Enclosed Generator SetsCaterpillar
- ISO 8528-10:2022, Measurement of airborne noiseInternational Organization for Standardization
- ISO 3744:2025, Determination of sound power levelsInternational Organization for Standardization