Our new-build house came with a gas stove+oven. Our overhead microwave does vent to the outside of the house so hopefully it helps a bit. The worst part is the oven’s vents face the front, so the fumes literally go up to your face if you’re standing in front of it. So when we use the oven, we try to keep distance and hope the the microwave vent sucks up as much fumes as possible.