Sadhguru: Basically It is just one. The opposite a single is simply an issue of size. We believed that If your houses are any where between 2000-2500 sq. ft., the Bhairavi Yantra would do. For residences larger than that, we mentioned it's not enough and we presented the Avighna. Avighna https://www.youtube.com/@Mahavidyabaglamukhi