ᐅ LAS Air Exhaust System (Chimney)

Is it a concern to run the condensate drain pipe from the gas condensing boiler through the bedroom on the upper floor? Does the condensate drain pipe cause or transmit noises that could be disturbing in the bedroom? What are your experiences?

Why should that be dangerous? As long as the pipe is not punctured, the exhaust gases are released outside. The flue gas temperature of a gas condensing boiler is low and inside the flue liner. The boiler only produces noise in the boiler room.
Contact the responsible district chimney sweep during the planning phase to avoid any surprises later on.