Quote Originally Posted by HoneyBadger View Post
Would it be safe to put something like this in an insulated box? Run the exhaust through a muffler? I'm just interested in keeping sound to a minimum.
Not unless you had a cooling fan. These units need air to maintain safe op temp. Minimize or restrict air flow and you have problems.
I looked at a few options to mask generator sound and came to the conclusion, no matter how quiet, lights in your dwelling is a dead give away.
If you want to keep noise to a minimum save your money and buy this unit. The Honda Eu2K runs forever on 1 gal of gas, unless you are standing real close, you'd be hard pressed to hear it run.
http://www.hondaenergy.com/product.php/38/honda_eu20i

Yamaha has a comparable unit
http://www.electricgeneratorsdirect....tor/p2785.html

The Eu2k is the flagship of portable "quiet" generators. They like the yamaha allow use of sensitive equipment like, pc's laptops etc.without needing to worry about damage to them.