Shriram: Pranam Swamiji, I want to know what is the relation between The five main Air which you have explained in one of your answers. They are Prana,Vayan,Udyan, Apan & Saman. We Brahimin before we start our lunch or dinner at home we also pronounce as Pranaysawa, Apanyaswa, Vayanayaswa, Udanyaswa, Samanayaswa and Brahamneyaswhaa by swallowing 2/3 pieces of cooked rice with ghee. Whether this is also called as hawana. This we do after our thread ceremony every day. Kindly explain.