Originally Posted By: jgallant
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Is there a standard minimum distance and height combination that a gas appliance “B” vent needs to be from an openable window to prevent exhaust gasses from entering living spaces? A house I inspected today, built in 1993, had a “B” vent terminate level with the bottom edge of upstairs windows, 5 feet from an openable hallway window and 6 feet from an openable bedroom window. Seems like an obvious risk of CO poisoning to me.