I have a vent near the ceiling in my kitchen (no controls/damper) that when the heat/AC/fan is on blows directly on my gas burners. I have to build a wall of cereal boxes, or cookie sheets to block the air in order to boil anything. I know that I can replace the grille with a register, but I would need to drag a stool or chair in order to adjust the air flow with the typical register. What are three-way registers primarily used for? Are their any registers with a different type of opener/closer that I could manuever without having to use a stool to adjust? Help!