[rrueckwald]

I believe David is correct, but there is a problem that still needs attention. In mine, the egg-crate-like anechoic material disintegrated where a blast of hot air from the generator continually hit it. The insulation got eaten away and wound up in the air filter. I bought some of Steve Birtles shiny material to mount in that one area, about 18" x 18". That may lose a little sound absorption, but will last longer. Just an idea.