I'm installing a CV in the corner of a 20' x '30' shop. I think it's the 1800 model with the 15" impeller. With the wynn filters it cranks out 88 dB. I need to vent into the shop. I've looked at the clearview website which has some good info. I'm wondering what you guys have done that's worked well to reduce the noise (and what you've done that hasn't worked well)