Range Hood Under Soffit . Requires a backdraft damper, very hard to do in a soffit. A range hood vent could be modified to filter into a soffit as another means of cooling the air in the kitchen. An under range hood is a great way to go when your space is from www.pinterest.com This way, the unwanted air encounters the least amount of resistance and vents out of your home with ease. A range hood vent could be modified to filter into a soffit as another means of cooling the air. As for the walls, rainscreen compatible intake and exhaust vents are now available.