JustAnotherSparky: Thank you for your purchase and the glowing review! It means a lot to us when trade professionals compliment our design and we appreciate your confidence in our products for your installs. We will definitely look into having the sone level of the Riazzi re-visited, per your suggestion! Please feel free to contact us anytime should you have any questions about this particular bath vent fan or any of our other trade professionals products! Reach us at 1-888-880-3267, anytime.