1:Noise is measured 6 feet fromperimeter of the fan.act.to AMCA 300"Reverberant Room Method for Sound Tesing".or ISO 13347 and BS 848 part 2.(tolerance±1.5 dBA)
2:Actual Airflow in CFM as measured with Horizontal Airflow on discharge side of one 15" deep transformer radiator.
3:Motor manufacture ace. to NEMA MG1 and IEC 60034. Finish paint of RAL9016.
4:NPT 1/2 terminal conpartment.
5:Guard: Hot Dip galvanlzed .Meet OSHA Standard.
6: Impellers: 4 Blades.die-cast aluminum.