Is breathe of fire better done through the nose or mouth?

[WoadWarrior]

As the title suggests, I have recently been revisiting the breathing exercises to make sure I have been doing them right but unfortunately the old video guide is now private.

 

[Yurei]

All breathing exercises are done through the nose, as this is the correct way to breathe.

 

[Henu the Great]

Some pranayama is done through the nose, and others through the mouth. Breath of fire is done trough the nose.