Cummins/Onan — Vents and Ducts
Installation · Ventilation
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DFEJ, Cummins/Onan DFEK, Cummins/Onan QSX15-G9 engine
Procedure
- For indoor installations, locate vents so incoming air passes through the immediate area of the installation before exhausting; install the air outlet higher than the air inlet.
- Size the vents and ducts large enough to allow the required flow rate of air.
- Locate the outlet vent so the effects of wind are eliminated, or install a wind barrier.
Specs & values
- The free area of ducts must be as large as the exposed area of the radiator
Full service-parts list: Cummins/Onan DFEJ →, Cummins/Onan DFEK →
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.