My kitchen is about 66 degrees, but the rest of my house is 73 because cold air is coming through my oven vent. I live in the midwest, and my vent faces northwest, so there is normally a cold wind blowing on the vent. I placed plastic over the vent and that helped eliminate the draft, but it is still very cold around the oven. Are there vents I can install that are insulated? Otherwise, I will have to remove the vent, add insulation, and reconstruct the wall.