This spring I will be installing an OAK for my stove in my old drafty house because I want to get rid of the draft caused by the stove drawing the cooler air across the floor. My question is I am reading about stoves with the OAK installed and people still using fans to push the cooler air back towards the stove. If the stove is using an OAK, what is the point of pushing the cooler air back towards the stove?