I am about to purchase a new house with a high efficiency furnace fueled with propane. The vent and fresh air intake pipes are PVC protruding from a side wall to the outside. The vent pipe is about 10 inches long and 15 inches above the ground, sticking straight out from the wall with nothing capping it. The fresh air intake pipe is an elbow with the opening facing the ground. The end, with the opening, is about 10 inches above the ground. My concern is that both ends have nothing on them to prevent critters or debris from entering. Also, what happens when we get a substantial snowfall and theses two things are buried.