Generator quieting

profdant139 wrote:
For the exhaust baffle, I think there is heat-proof insulation for home water heater chimneys -- it should not be too expensive. I should measure the temp of the exhaust area to see if there is a real fire danger.

Custom polycarbonate exhaust shrouds sold by Generator Line are rated to a moderate 250F so the 2000F batting I used is far beyond what is really required. Since I always use my quiet box in my Avalanche's rear cargo compartment I was thinking of dispensing with the plastic box entirely by simply enclosing the generator with a "box" formed with this West Marine Noise Control Barrier. Since it's a relatively stiff material I'd mount the same intake fan I'm currently using directly on the intake end wall, forget using an exhaust baffle, and instead exhaust directly out using a Generator Line exhaust shroud. If the foam needed any additional strengthening the outside of the foam enclosure could be reinforced with a lightweight plastic product such as Coroplast which is often used to enclose a trailer underbelly and which can be purchased at stores such as Home Depot. This design would certainly be lighter than any plastic or wood box lined with the same noise barrier and could probably just be set in place over the generator. The only reason I haven't proceeded with this idea is the significant cost of the noise barrier material and the Generator Line exhaust shroud which together could easily be $500 Cdn at the current exchange rate. :E