Hey guys so basically I’m looking at this flu and wondering if it’s something I should write up as a defect. I know the smaller appliance should enter on top and it seems like technically the way this is set up he larger furnace is on top of the smaller water heater. Just an FYI the furnace is on he right and water heater is on the left. Also I see all this moisture staining and I’m assuming it’s safe to say it’s likely from the flu exhaust but what’s the deal with the metal plate on the wall ? Is it for flu clearance ?