www.foodengineeringmag.com/articles/82831-tangential-fans
Tangential fans
May 2, 2005

LTG's tangential fans produce a swirl-free, all-over airflow in the oven during the browning process. The company says the fans uniformly brown rolls and baked goods because they are exposed to a non-turbulent, extended flow of hot air. The fans may be used in a surrounding temperature of -40