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All Srauta yajnas or yagas are associated with त्रेताग्नयः the three Agni's, and hence also called Srautaagni.<ref name=":022222222">Venkateswara Rao. Potturi (2010) ''Paaramaathika Padakosam'' Hyderabad: Msko Books</ref> However, not all three fires are lighted and maintained at all times. त्रेताग्नयः the three fires are kindled in performance of yagas. Somayagas require the kindling of all three fires whereas others do not require so<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>.

All Srauta yajnas or yagas are associated with त्रेताग्नयः the three Agni's, and one of them Garhapatya agni is also called Srautaagni.<ref name=":022222222">Venkateswara Rao. Potturi (2010) ''Paaramaathika Padakosam'' Hyderabad: Msko Books</ref> However, not all three fires are lighted and maintained at all times. त्रेताग्नयः the three fires are kindled in performance of yagas. Somayagas require the kindling of all three fires whereas others do not require so<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>.

=== Tretagni and Ekagni ===

=== Tretagni and Ekagni ===

The section in the Apastamba-sutras dealing with the offerings made in the three fires is called "Tretagni-kanda". One who worships the three Agnis is called a "srauti" and if he worships the srauta and grhya fires, he is called an "ahitagni". Ekagni is the sacred fire in which the the chaitanyam of the creating-energy is meditated and Vhree (Rice grain) is offered to the Agni with recitation of prescribed mantras and is called as Aupasana. If aupasana is a grhyakarma, Agnihotra is a srauta karma and it too must be performed twice a day.<ref>Sri Sri Sri Chandrasekhararendra Saraswati Swami (2000) ''Hindu Dharma.'' Mumbai : Bharatiya Vidya Bhavan</ref>

The section in the Apastamba-sutras dealing with the offerings made in the three fires is called "Tretagni-kanda". One who worships the three Agnis is called a "srauti" and if he worships the srauta and grhya fires, he is called an "ahitagni". Ekagni is the sacred fire in which the the chaitanyam of the creating-energy is meditated and Vhree (Rice grain) is offered to the Agni with recitation of prescribed mantras and is called as Aupasana. If aupasana is a grhyakarma, Agnihotra is a srauta karma and it too must be performed twice a day.<ref name=":0">Sri Sri Sri Chandrasekhararendra Saraswati Swami (2000) ''Hindu Dharma.'' Mumbai : Bharatiya Vidya Bhavan</ref>

A few important features of the three agnis are summarized below   

A few important features of the three agnis are summarized below   

=== गार्हपत्याग्निः ॥ Garhapatyaagni ===

=== गार्हपत्याग्निः ॥ Garhapatyaagni ===

Information about of गार्हपत्याग्निः ॥ Garhapatya agni  

Information about of गार्हपत्याग्निः ॥ Garhapatya agni<ref name=":0" />

* It is kindled after marriage, and is be maintained and worshipped for the rest of the life by the grihastha along with his wife.  

* It is kindled after marriage, and is be maintained and worshipped for the rest of the life by the grihastha along with his wife.  

* It is ceremonially established with the elaborate vedic procedure involving recitation of specific mantras during the process called Agnyadhana. The Aupasana Agni lit at the time of the grooms wedding is passed on from the father to the son. It is divided into two during the Agnyadhana process. One part becomes the Grhyagni and the other becomes the Srautagni called Garhapatya.   

* It is ceremonially established with the elaborate vedic procedure involving recitation of specific mantras during the process called Agnyadhana. The [[Aupasana]] Agni lit at the time of the wedding is passed on from the father to the son. It is divided into two during the Agnyadhana process. One part becomes the Grhyagni (Smartagni, Aupasanagni) and the other becomes the Srautagni called Garhapatya.   

* It is the only Agni that is maintained continuously and daily aahutis are to be made to this Agni by the grihastha.

* It is the only Agni of the three Agnis that is maintained continuously.  

* It is used by grihastas for general domestic usage, to cook food and offering of aahutidravyas used in other yajnas by reciting mantras.  

* It is placed to the west of the yajnavedi and placed in circular shaped kunda in Srauta yajnas.  

* It is placed to the west of the yajnavedi and placed in circular shaped kunda in Srauta yajnas.  

* It is rekindled by a special process involving the Prayaschitta mantras called "Punaradhana" if it gets extinguished for any reason.   

* It is rekindled by a special process involving the Prayaschitta mantras called "Punaradhana" if it gets extinguished for any reason.   

* It is used in nityakarmas.   

* It is used in nityakarmas (Agnihotram) as well as in other [[Srauta Yajnas (श्रौतयज्ञाः)|Srauta Yajnas]].   

* It is the source of other two Agnis.

* It is the source of other two Agnis, Aahvaniya and Dakshinagni.

* Only a sapatnika yajamani (grihastha) of the three varnas is allowed to tend this Agni.  

* It is used to cook aahutidravyas and for heating. No specific ahutis are performed in this Agni.  

* Only a sapatnika yajamani (grihastha) of the three varnas is prescribed to tend this Agni according to some sources, while others mention that persons of all varnas may do so.  

=== आहवनीयाग्निः ॥ Aahvaniyaagni ===

=== आहवनीयाग्निः ॥ Aahvaniyaagni ===

Some salient aspects about आहवनीयाग्निः ॥ Ahvaniya agni are as follows

Some salient aspects about आहवनीयाग्निः ॥ Ahvaniya agni are as follows

* It is invoked only in special aabhicharika yaagas unlike Garhapatya agni.

* Aahvaniya agni is established from the Garhapatya agni along with the recitation of specific mantras.

* Ahvaniya agni is established from the Garhapatya agni along with the recitation of specific mantras.

* It is not maintained continuously everyday and is considered as Laukikagni at the end of the specific yaaga for which it is invoked.

* It is not maintained everyday and is considered as Laukikagni at the end of the specific yaaga for which it is invoked.

* It is placed to the east of the yajnavedi, in a rectangular shaped kunda.

* It is placed to the east of the yajnavedi, in a rectangular shaped kunda.

* It is used to offer aahutis to the devatas only during Srauta yajnas.  

* It is used to offer aahutis to the devatas during Srauta yajnas.  

=== दक्षिणाग्निः ॥ Dakshinaagni ===

=== दक्षिणाग्निः ॥ Dakshinaagni ===

Salient aspects about दक्षिणाग्निः ॥ Dakshinaagni is as follows

Salient aspects about दक्षिणाग्निः ॥ Dakshinaagni is as follows

* Dakshinaagni is established from the Garhapatya agni along with the recitation of specific mantras during yajna karmas.

* Dakshinaagni is established from the Garhapatya agni along with the recitation of specific mantras during yajna karmas.

* It is not maintained everyday and is considered as Laukikagni at the end of the specific yaagam for which it is invoked.

* It is not maintained continuously everyday and is considered as Laukikagni at the end of the specific yaagam for which it is invoked.

* It is placed to the south of the yajnavedi, in a half circle shaped kunda.

* It is placed to the south of the yajnavedi, in a half circle shaped kunda.

* It is used to offer aahutis to the pitrudevatas or forefathers only.  

* It is used to offer aahutis to the pitrudevatas or forefathers only.