Bard QH243 User Manual download pdf (Page 100)

B450i Air Flow Performance

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Air flow through the B450i is dependent on both the supply voltage and the air

stream, as supply and exhaust air operate on different curves. The internal fans are

direct drive with 4 speeds, labeled A, B, C, and D in the graphs. The 115V unit is

shown below:

Speed A

Speed B

Speed D

Speed C

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

0 50 100 150 200 250 300 350 400 450 500

Volumetric Flow [SCFM]

External Static Pressure [in-H2O]

B450i-x11 Supply Air

Speed A

Speed B

Speed D Speed C

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

0 50 100 150 200 250 300 350 400 450 500

Volumetric Flow [SCFM]

External Static Pressure [in-H2O]

B450i-x11 Exhaust Air

1 2 ... 95 96 97 98 99 100 101 102 103 104 105 ... 115 116

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