Answer in Details
While traditional practice may suggest chanting in a clean and quiet place, such as a temple, home altar, or during meditation, Lord Shiva’s teachings emphasize that sincerity and devotion are most important. Lord Shiva is known as the compassionate and all-pervasive deity who accepts sincere prayers from anywhere, regardless of place or circumstance.
So, you may chant "Om Namah Shivaya" wherever you are—at home, while traveling, at work, or even silently within your heart. The key is to chant with devotion, respect, and a pure intention.