Reviews : Blair-Line-Signs Wall Fans (6) & Vents (15) Blair Line Signs Wall Fans (6) & Vents (15) $8.29 Leave a Rating! ★ ★ ★ ★ ★ OR Write a Review! Write a Review Sort 5-Star: 1 (1 ratings) 4-Star: 0 (0 ratings) 3-Star: 0 (0 ratings) 2-Star: 0 (0 ratings) 1-Star: 0 (0 ratings) Reviews Adds a distinct detail to any building By: vic3harris (Greenwood S C) Very easy to assemble wal exhaust fans for the outside of buildings. Adds an interesting detail to any building. (3)