Large industrial 50 sock dust collection system, great for large workshops.
It is only a few years old, brand new they are around $17,000.

The flow through sock design continuously cleans your filters for you as the extractor operates.
You can set it up to discharge into a 1.5 cube dump bin or into 3 PVC bags.
It is powered by a 15HP blower with a VSD controller for setting the fan speed.

Make: LEDA
Model: TD1100

Volume: 12000m3/hr
Inlet: 400mm diameter

Voltage: 415V
Power: 11kW

Overall Dimensions with legs attached: 2710 x 1010 x 3800 H