S
silent_lemon
im with this feller, 6" SP and DIY muffler...or go bigger....diameter, they sell emI am extremely pleased with my Soler & Palau fans.. having a small tent in the bedroom sound was my number one concern.. a 4" centrifugal from HTG sounded like a jet engine at night... replaced with 6" S&P and it's practically silent.
FIN!