1800 sqft + basement
On main floor 2 window air conditioners 19k btu combined
Upstairs 1 5k btu air condition
There are 3 bedrooms upstairs. Does it make sense to just put all the ac units upstairs and let the cold air drop down through the floor or to drill vent holes in the floor? Would this method actually cool the main floor or reduce humidity on the main floor? The stairway is pretty open so all hot air floats up here pretty quickly.