Just slipped my anorak on for this one.
The K model flight deck conditioner handled a mass of 30 lb/min (15 lbs/min from GTC).
The late H models had larger ones (similar to cargo cpt) 70 lbs/min.
OK, that's why we used to go 'Supercool' on low level. AirCond/NoPress with the Aux Vent Valves open to get ram effect too.
Anorak OFF.
ps all the above IIRC