As you know aranmula kannadi is very special and auspicious, which brings good luck & prosperity to the place where it kept, there are certain rules to place it in your home or business.
You can place aranmula kannadi anywhere where its clean and clutter free. you can place it in your drawing room, pooja room, bedroom, dining room but not in kitchen. But You should not place the aranmula kannadi facing the entrance of the bathroom / toilet.
many people are asking to which direction it should kept. Any direction is good, and east is ideal. Why this? because the mirror is reflecting light and gives positive energy. east is the direction where light comes ( as sun rises). so if your house / business have a facility to face it towards south, that is fine. and other directions are also fine.