Note 114 — Chapter XL · A DESCRIPTION OF VISHNU.
Manmatha Nath Dutt translation
Three fires are (1) Dakshināgni or a kind of sacred fire that which is taken from the domestic or consecrated fire and is placed to the south (2) Garhapatya or a perpetual domestic fire (3) Ahavaniya i.e., a fire into which oblation is offered.