Is wind from the self of Allah? And what is incumbent upon one who hears an Imam describe Allah as being in every place, citing as proof His saying, the Most High: "There is no private counsel of three but He is their fourth"? And why does one who says Allah is in every place become an unbeliever, and are there any impediments to apostasy occurring for this reason?

What you mentioned, that the wind is from the 'breath of Allah,' is related in a narration from Ubayy ibn Ka'b, which is stopped at him (mawquf), and its meaning is that Allah relieves the distressed through it.

And the statement of one who says that the meaning of Allah's saying: {And He is the Irresistible (Qahir), above His servants} is indeed a self-existent (Dhati) highness, is correct. And whoever restricts the meaning to merely the highness of power (qahr) or status (qadr) has erred.

And the statement that Allah, by His Essence, is in every place, is false, disbelief (kufr), and misguidance. However, it does not necessarily follow from a statement being disbelief that its utterer becomes a disbeliever, for declaring someone a disbeliever (takfir) has its own rules and conditions.