Kitchen Hood Make Up Air

Portland has begun calling out the 400cfm cut off which requires make up air systems attached to the operation of the kitchen Hood/downdraft for remodels.

I understand the point and I've researched the different systems, but I've never sold and had one installed as part of a kitchen remodel. Seems they can be as simple as a dampered duct drawing unconditioned air inside($1000-$2000) or as complex as pre treating the air before it goes through the entire ducted system($3000+)

Could anyone explain the process of installing one? Is it as simple as connecting the two systems(hood to make up air damper) with low voltage wire? Does anyone have experience with an easy wireless option?