Nizhal Thangal (Tamil: நிழல் தாங்கல்; also called Inai Thangals) are secondary worship places of the Ayyavazhi, often smaller in size compared to Pathis, built per the instructions of Akilattirattu Ammanai. Cleanliness is strictly enforced.
Though the common people, mainly in early times call them as Narayanaswami koil or Narayanaswami pathi, the Ayyavazhi scriptures consider these centers distinct from The Pathis. They call these worship centers, which were not associated with the religious activities of Vaikundar as 'Inai Thangals'.
After the trial of Vaikundar with the king of Travancore, the followers built religious centers following his instructions to propagate his teachings which were called as Nizhal Thangal. Akilattirattu Ammanai call this as religious schools. The LMS reports too speak in abundance about these worship centers
Tamil is the official language of worship, and the object of worship is Lord Narayana with the trinity of Brahma, Vishnu, and Shiva. Nizhal Thangals in Chettikudiyiruppu, Agastheeswaram, Paloor, Sundavilai, Vadalivilai, Kadambankulam and Pambankulam were established during the period of Vaikundar per Akilam. And after a large number of Thangals were established throughout India. There are more than 8000 worship centres throughout India
These Nizhal Thangals formed place in the socio-religious life of the people. All the people were brought together here irrespective of caste distinctions. The mode and formalities of worship were revolutionalised in these centers.
Unlike Pathis this Thangals were of small size. Inside the Nizhal Thangals, no murti or idol is used. The Palliyarai of Thangals generally seems similar to Pathis. But inside, in most of the Thangals instead of raised pedestal, chairs were placed as asanas in which the saffron or silk cloths are wrapped-around. A garland made of rudraksha (string of rudraksha beads) is placed around the neck of the asana. Mirrors were placed behind. In front of these there will be two standing oil lamps(kuthu vilakku)made of brass, each placed on the either side of the asana.