I have a register in one of the rooms where the heat blasts at really high velocity and it gets incredibly hot in the winter (80+). My son has been complaining for years and I can’t seem to find the right way to divert the flow away from that room. The rest of the registers that happen to be further or closer than this one seem to receive an acceptable volume and the temp distribution is fine everywhere else.
The problem register is 12x12, where as the other registers on the floor are 10x10.
What would you advise I can do?