300 Series Forward Curved Roof Exhauster

SKU#:

300 SERIES

For economical use in schools, hospitals, high rise apartments and many other commercial & industrial applications where quiet operation is required.

  • Square base allows discharge to be oriented in any of 4 directions.
  • Back draft damper and bird screen included.
  • Heavy duty ball bearings suitable for -65º to +250º F.
  • Cabinet insulated with 1/2” fiberglass insulation.
  • Low operating RPM of forward curved blowers results in low noise levels.
  • Quiet operation. Blower is mounted on heavy steel angle with rubber isolators.
  • Attractive green baked powder coat finish.
  • Automatic gravity back draft damper and bird screen are included.
  • Motor receives the cooling benefits of being in the air stream for increased motor life.
  • Recessed base ensures weather proof mounting to curb.
TYPICAL MAXIMUM CFM @ SP
MODEL1/2” SP1” SP1 1/2” SP2" SP2 1/2" SPMin HPMax HP
307120011009007005001/43/4
30918001600130010007001/43/4
310280025002200200016001/41 1/2
312370033002900250017001/42
315570052004600410034001/23
318880080007200660058001/25
Power rating (BHP) does not include transmission losses. Performance certified is for installation type B - Free Inlet, Free Outlet. Performance ratings include the effects of the outlet hood and screen, but do not include the effect of other appurtenances (accessories).
CFM values listed above are summarized for convenience.
        
       
        
        
       
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*D is an inside dimension. Curb size must be smaller to allow for flashing.
MODELABC* D INSIDESHAFT DIAMETERWEIGHT (lbs) without motor
30720 3/8"16 5/8"9"20"3/4"45
30924 3/8"19 3/8"10 5/8"24"3/4"63
31028 3/8"21 3/8"11 3/8"28"3/4"88
31232 3/8"24 5/8"13 1/8"32"3/4"113
31536 3/8"28 3/8"14 7/8"36"1"156
31840 3/8"33 3/4"17 3/8"40"1"224
       
       
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      

* May not be exactly as shown. Blower assembly may be oriented differently

Replacement Parts

Click your model number below for replacement parts.

Model #
307
309
310
312
315
318