This blower is in great working condition.
It belt driven and powered by a 22kW 3 Phase motor.
The inlet has a butterfly valve and the outlet has a motorised open-close lid/valve as well as adjustable open-close flaps.

Make: Aerotech
Model: HP274

Inlet Diameter: 195mm
Outlet Size (mm): 260 x 145
Motor: 22kW 400V 1460 RPM
Overall Dimensions (mm): 920 w x 800 d x 1110 h