If you go with the Plymovent System make sure it's equipped with an exhaust silencer, especially if you have a large amount of apparatus or long runs of duct work. If not, expect complaints from neighbors when the system kicks on. We learned this the hard way.
Any vehicle exhaust extraction system funded under this
activity should be either extensive enough to extract all toxic vapors and particulates emitted from internal combustion engines and meet all applicable Federal, state, and local standards or be a part of a larger comprehensive system that does. Some exhaust extraction systems may meet standards for removal of certain carcinogens, but not others; therefore,it may be necessary to utilize more than one system or employ complementary systems to fully protect your firefighters.