Valco Companies, Inc 2710 Division Highway , New Holland , Pennsylvania 17557 USA About Solutions products Publications videos articles Downloads Companies Valco Companies, Inc Videos Hemisphere Smoke Test Video Hemisphere Smoke Test Video 0 Share This video shows the distribution of air (as represented by smoke for visual purposes) with the Hemisphere Mixing Fan. Customer comments No comments were found for Hemisphere Smoke Test Video. Be the first to comment! Add your comment Publish your comment Great! comment successfully added!