25 MM THICK DOUBLE SKIN CONSTRUCTION DRAW THRU TYPE FAN SECTION AIR HANDLING UNIT AS PER SPECIFICATION, EACH COMPLETE WITH FOLLOWING- SUPPLY AIR CENTRIFUGAL BACKWARD FAN WITH EFFICIENCY >= 60 %, TECF MOTORS SUITABLE FOR 415+-10% VOLTS, 50HZ, AC SUPPLY MEETING CRITERION AS PER ASHRAE STANDARD 90.1-2013 AND HIGH EFFICIENCY (EEF-1). VIBRATION ISOLATOR AND PRE -FILTURE (MERV-8) SHALL BE PROVIDED, FAN OUTLET VELICITY NOT EXCEEDING 10 MPS. 4000 CFM, 15 MM WC STATIC PRESSURE, MOTOR CAPACITY 1.5 KW