No idea about the Roadtrek SS Agile's A/C unit, but most are about the same as running a window unit in the bedroom of your house.
The furnace can be a little quieter, but many have noisy fans.
Light sleepers, beware.:B
Mike. Comments are anecdotal or personal opinions, and worth what you paid for them.
2018 (2017 Sprinter Cab Chassis) Navion24V + 2016 Wrangler JKU (sold @ ????)
2016 Sunstar 26HE, V10, 3V, 6 Speed (sold @ 4600 miles)
2002 Roadtrek C190P (sold @ 315,000kms)