Oh my , any alternative other that a concrete wall ? as considering if not now , the near future if need to move bulky sofa for example... might be hard due to the concrete wall? Does the dinning table and sofa which is between the window and main door help? could it possible tat ppl who sit or occupy the sofa or dinning area are actually receiving the Chi as well or the very least detouring the Chi. like pebble obstructing a river flow