Talk:Lean air

Standards?
Are there standards for composition of lean air? Is the major component necessarily nitrogen? If not, what else, If so, it should be specified. Lean air would be a by-product of oxygen enriched nitrox production by pressure swing adsorption and membrane gas separation. &middot; &middot; &middot; Peter Southwood (talk): 11:05, 1 January 2024 (UTC)

Breathing gas?
Is lean air classified as a breathing gas? What are the specifications? &middot; &middot; &middot; Peter Southwood (talk): 11:13, 1 January 2024 (UTC)