Can someone help me understand this configuration. The white tank is a “warming tank”. The hot water exits the water heater and goes into this tank. The water then is distributed to the home from this holding tank. So many things here.
My question is… Why is there a flex duct attached to the GFA heating duct? What is the purpose of it? That specific heating duct supplies the kitchen above.
When I ran the HOT water throughout the home I found that it was contaminated. (Cold water was fine) I’m guessing that this is due to the 30 year old water heater that is original to the home but could it have something to do with this tank configuration to a heating duct?