Hi everyone, I'm having an issue with my furnace or ductwork that I'm stumped on. My first floor is divided into three large duct zones that are supplied off my furnace. Two of them have a great deal of pressure while the third does not. I have closed dampeners on two zones and made sure the one with little flow is open. Even with this it still seems uneven. What seems strange is the farthest vent from the furnace on the good flow vents is still much higher than the whole duct zone with little flow. Any help would be appreciated. I have tried closing dampeners on the high flow sides. Sealing any and all leaks. Looked for any obstructions. It just seems that more air is going to the other two ducts.