When you say connected to the outside, outside of what? Does your installation suggestion involve connecting it in any way to the HVAC system, or do you mean to connect it entirely separately as a stand-alone setup? Contractor may understand what you mean, but I'm in the dark and I'd like to know too so I don't appear an idiot on the subject (which I am at this point)
The intake of the filter is connected to the outside of the house, to bring in fresh air. The supply/exhaust (clean air) should be connected in some manner to a whole house dehumidifier or the return of the HVAC system so the fresh air gets conditioned.