Sound Proof Generator Box

Sound proof box for my Champion Generator. The generator is 3500 watts and very noisy. The box has a 800 SCFM 12" fan that pushes air through the box and keeps it quite cool. The box is also double lined and the air inlet and outlets go though channels and the channels are lined with sound absorbing foam so the sound will not reflect out the vents. I also insulated between the inner and outer box. From the street 20' away I barely can hear the generator running. Thanks for watching.