Outdoor systems has unique considerations. For example, outside systems produce considerably more condensation than inside pipe routes. We strongly recommend routing some of this moisture around the fan with a condensation bypass kit to lengthen the life of the fan and so does the manufacturer.
Radon vent pipes can be run up the exterior of a building to the roof. But this not recommended in colder climates because vinyl and metal downspouts will freeze up much quicker than schedule 40 PVC pipe. If your installation is placed where it will receive some direct sunlight for a good portion of the day, freeze up will be minimized. Darker colors will help too.
Find condensations bypass kits, downspout items and outdoor electric solutions here.