Which interfaces should be documented?
Register the engine and alternator outline, exhaust, cooling airflow, inlet and discharge path, service access, cable entries, doors and any acoustic treatment included in the approved design.
| Interface | Drawing content | Review source |
|---|---|---|
| Air path | Inlet and discharge openings | Airflow basis |
| Exhaust | Penetration and support | Vendor arrangement |
| Panels | Construction and joints | Approved detail |
| Access | Doors and service path | Maintenance requirement |
| Acoustic | Treatment and boundary | Qualified calculation |
Sources: National Fire Protection Association: NFPA 110, Standard for Emergency and Standby Power Systems, ASHRAE: ASHRAE Handbook
What should not be promised?
Do not promise a decibel result, attenuation value or thermal outcome without a qualified calculation and project test basis. The service scope should name the review required.
Sources: ASHRAE: ASHRAE Handbook
What does the drawing review cover?
The drafter checks supplied geometry, interfaces, tags, revisions and open inputs. The qualified acoustic or engineering reviewer decides whether the design meets the project requirement.
Common questions
What else should the bid team know?
Does a drawing pack certify acoustic or thermal performance?
No. Acoustic predictions, ventilation performance and certification require qualified review against the project inputs and applicable requirements.
Can enclosure dimensions be guessed from the genset name?
No. Use the approved vendor outline, service clearances and project constraints. Missing dimensions remain open.
Who approves the engineering design?
The responsible registered engineer or qualified project reviewer approves engineering content and performs sign-off.
Primary sources
- Generator enclosure design guidanceUS Environmental Protection Agency
- NFPA 110, Standard for Emergency and Standby Power SystemsNational Fire Protection Association
- ASHRAE HandbookASHRAE