Our upstairs bonus room has open arches into the main living space. We wanted a way to temporarily reduce noise of kids playing upstairs without permanently interrupting air flow as the house uses two A/C units.
After looking at various options, we settled on this.
Used four panels to span the opening. Using hinges joined two panels together so they could open 100% or 50%.
Added magnetic catches to keep them closed and also added hooks to lock them.