Autoclave Aerated Concrete is a Lightweight, Load-bearing, High-insulating, Durable building product, which is produced in a wide range of sizes and strengths. AAC Blocks is lightweight and compare to the red bricks AAC blocks are three times lighter.
AAC wall panel is a light weight material, and under any given casting conditions they are not a reliable load bearing member. Unless you test and certify every panel specifically, it is a vague bet on these. However being light weight and easy to move makes them amazingly easy to work with. Best to use them for interior walls and choose a traditional exterior or maybe a waterproof facade.