Distribution700
B737-700  Air Distribution
Air Systems SGR
Air Conditioning Distribution

Conditioned air for the cabin comes from either the airplane air conditioning
system or a preconditioned ground source. Air from the preconditioned
ground source enters the air conditioning system through the mix manifold.
The air conditioning system provides temperature controlled air by processing
bleed air from the engines, APU, or a ground air source in air conditioning
packs. Conditioned air from the left pack, upstream of the mix manifold, flows
directly to the flight deck. Excess air from the left pack, air from the right pack,
and air from the recirculation system is combined in the mix manifold. The
mixed air is then distributed through the left and right sidewall risers to the
passenger cabin.