cfcubed wrote:
Having re-tested this design with generator under moderate -> heavy load, not in econo mode, for a sustained period I felt exhaust side temps were too high. Small sections of plastic bread keeper on exhaust side got > 90c. Ordered 240CFM replacement fans & will be using a $18 steel mailbox on exhaust side, with larger/taller outlet side hole, to see how that works/helps. My prior tests were shorter / lighter load / econo mode ones.
JMO but adding a fan to draw hot cooling air and hot exhaust out of your genset quiet box is the wrong approach. Both the Honda & Yamaha inverter series of gensets have carefully designed enclosures which draw in cooler air on the intake side, direct it to critical areas of the generator, and properly exhaust it out while not allowing it to mix with more incoming cooling air. Examine
jauguston's pics and you'll see he used
no fan for his own EF1000iS quiet box and while I did install one in my own box I placed on the intake side, not the exhaust side. If you're convinced the engine is running hotter than it should the key IMO is to increase intake cooling air.
