I'm currently drawing air through the side of my building with one of these. Only problem is that it's making a whole lot of noise on the outside. Is there a way to reduce some of that noise?
Thats an exhaust vent. You say you are drawing air through it (intake function)? If so then I assume you have removed the flapper door or screwed it open. Is the noise you hear the actual fan or is it the air moving through that vent?
I have 10 and 12 inch intakes using dust shrooms in my basement window wells. You can't hear any blower noise but I have about 10 or 12 feet of duct on the 10 inch and about 25 feet on the 12 inch. The duct is galvanized snap seam. The blower without the duct is loud as hell, with the duct it's super quiet.
So if you have the blower stuck right by the vent you should install some galvanized snap seam duct and make the run between the blower and the vent at least 10 feet. Do NOT use accordion duct, galvanized snap seam. If your intake is going to have really cold air in the winter you will want to put insulation around the outside of the duct and blower to prevent condensation on the outside of the duct dripping everywhere.