condensation?
Good question. There shouldn't be much. I wonder if a Lamb bypass 2 stage motor is tough enough to handle it.
Mine has been in my garage exposed to condensation for sure for over 20 years.
Some light rust inside the dirt canister, but that's it.
An exhaust muffler will fit any unit. The Beam serenity series uses that, plus an insulated vented plastic cover on top.
I added a muffler to my Hoover, and it makes a big difference.