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Paully_B
what this picture doesnt show is there is about 3-4 inches on either side of the hood
The only last-ditch effort I could recommend to save that hood would be to turn it diagonally so you'd have a little bit more room on either end with the ducts. If it's not a problem to return/exchange it then it's probably better to just do that.i have just boxed the blockbuster back up. it is too big for the dr90 and to be able to run duct work for it. i am going back to get the supersun 4inch side vented hood.
Mounting on the inside would give you a little bit of noise reduction, less heat absorbed by the fan itself, and easier mounting since you can just hang it. Putting it outside would give you more room inside, and considering the size of that (or a different) hood, and the fact that you also need a filter in there, I think that's a good idea. My opinion is that more noise comes from the duct work immediately before and after the fan then the fan casing itself. If you're insulating or otherwise somehow covering the ductwork around it you'll have a reduction in noise. The tent walls are not very good at dampening or absorbing sound. I say go for outside. You need room inside for things that absolutely must be inside.is it best to mount the fan on the outside of the inside? pros and cons to both?