Has anyone had better luck with one cap over the other, The Simpson Square Vent Cap 33085 looks like a dryer vent, tucks against the house nice , but wonder if it too close an causes soot, Selkirk has a few some look like just a pipe with screen? another has a cone over the pipe, another one looks like the flying nuns hat ? Can't find much info on wether one is better than the other, anyone ?