Shree Panchanan Ganesh Yantra
Lord Ganesha controls all the 5 elements (panchtatva): air, water, fire, earth and sky. The Panchtatva Ganesha yantra helps balances these five elements.
Mantra-
Vakratunda Mahakaya Surya koti samaprabha
Nirvighnam kurume deva sarvakaryeshu sarvada
Placement:
Yantra may be kept in your home / office / altar facing North/ East /North East direction.