Sadhguru: Basically it is just one. The other one is just a matter of sizing. We believed that If your residences are any place involving 2000-2500 sq. ft., the Bhairavi Yantra would do. For residences more substantial than that, we explained this isn't adequate and we provided the Avighna. Avighna https://rafaelmqmga.livebloggs.com/45912157/sadhna-an-overview