I'm going to have my oil burner replaced on my Weil-McLain WGTO3 tankless.
I was planning on having the Riello F5 as the replacement, but wondered if there would be any benefit to having the BF5 (balanced flue) instead? I know an outside vent and piping would have to be put in to duct the intake, but would there be any benefit to doing this? My tech pretty is indifferent, which makes me think he doesn't really know and I don't have many options for oil tech's where I live.