Changes

* Starting from marriage, a grihasta (along with his wife) offers yava or rice aahutis twice daily at twilight time (dawn and dusk) in the Aupasanagni, this is also called as Aupasana.<ref name=":022222222">Venkateswara Rao. Potturi (2010) ''Paaramaathika Padakosam'' Hyderabad: Msko Books</ref>   

* Starting from marriage, a grihasta (along with his wife) offers yava or rice aahutis twice daily at twilight time (dawn and dusk) in the Aupasanagni, this is also called as Aupasana.<ref name=":022222222">Venkateswara Rao. Potturi (2010) ''Paaramaathika Padakosam'' Hyderabad: Msko Books</ref>   

* All the daily ahutis and cooking involves the aupasana fire and pertain exclusively to the individual and his family. Thus, "Grhyakarmas" including the seven pakayajnas involve the aupasana agni (Grhyagni or smarthagni). They are related exclusively to the family and are not very elaborate.     

* All the daily ahutis and cooking involves the aupasana fire and pertain exclusively to the individual and his family. Thus, "Grhyakarmas" including the seven pakayajnas involve the aupasana agni (Grhyagni or smarthagni). They are related exclusively to the family and are not very elaborate.     

* Aupasana is to be performed by the grihasthas of the three varnas. Valmiki Ramayana in Ayodhya kanda mentions that Sri Ramachandra, a kshatriya, enquires Bharata about tending the Agni in the house.<blockquote>कच्चिद् अग्निषु ते युक्तो विधिज्नो मतिमान् ऋजुः | हुतम् च होष्यमाणम् च काले वेदयते सदा || २-१००-१२ (Valm. Rama. 2.100.12)</blockquote><blockquote>''kaccid agniṣu te yukto vidhijno matimān r̥juḥ | hutam ca hoṣyamāṇam ca kāle vedayate sadā || 2-100-12''</blockquote>Meaning : "I hope that a brahmana who is versed in the traditions, who is intelligent and just, employed in your sacred fires, always informs you in time, about a sacrificial fire having been or going to be fed with oblations."<ref>Valmiki Ramayana [http://valmikiramayan.net/utf8/ayodhya/sarga100/ayodhya_100_frame.htm Ayodhya Kanda] Sarga 100</ref>

* Aupasana is to be performed by the grihasthas of the three varnas. Valmiki Ramayana in Ayodhya kanda mentions that Sri Ramachandra, a kshatriya, enquires Bharata about tending the Agni in the house.<blockquote>कच्चिद् अग्निषु ते युक्तो विधिज्नो मतिमान् ऋजुः | हुतम् च होष्यमाणम् च काले वेदयते सदा || २-१००-१२ (Valm. Rama. 2.100.12)</blockquote><blockquote>''kaccid agniṣu te yukto vidhijno matimān r̥juḥ | hutam ca hoṣyamāṇam ca kāle vedayate sadā || 2-100-12''</blockquote>Meaning : "I hope that a brahmana who is versed in the traditions, who is intelligent and just, employed in your sacred fires, always informs you in time, about a yajnika agni having been or going to be fed with oblations."<ref>Valmiki Ramayana [http://valmikiramayan.net/utf8/ayodhya/sarga100/ayodhya_100_frame.htm Ayodhya Kanda] Sarga 100</ref>

* Every grihastha has to maintain the agni until he is prevented by old age or illness or death. In case where he cannot perform it on behalf of him his son, brother or son-in-law may perform the ritual. <ref name=":122222222">Purkayastha, Dipanjona (2014) Ph. D Thesis from Assam University : ''[http://hdl.handle.net/10603/41946 A Study of the Asvalayana srauta sutra with reference to the principal sacrifices]''</ref>   

* Every grihastha has to maintain the agni until he is prevented by old age or illness or death. In case where he cannot perform it on behalf of him his son, brother or son-in-law may perform the ritual. <ref name=":122222222">Purkayastha, Dipanjona (2014) Ph. D Thesis from Assam University : ''[http://hdl.handle.net/10603/41946 A Study of the Asvalayana srauta sutra with reference to the principal sacrifices]''</ref>   

* Anuditahomi's perform aupasana homa before sunrise and Uditahomi's perform it after sunset.<ref name=":122222222" />  

* Anuditahomi's perform aupasana homa before sunrise and Uditahomi's perform it after sunset.<ref name=":122222222" />