CERTIFIED TEST DATA 
Air delivery and sound level ratings are certified by the Home Ventilating Institute Division of AMCA, based on testing performed by an independent third party testing laboratory, in accordance with HVI standards. This NuTone model is listed by Underwriters' Laboratories Inc. and Certified by the Canadian Standards Association (CSA.)
AIR PERFORMANCE CURVE-ILF120
4 In. Duct
STATIC PRESSURE |
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INCHES OF WATER | 0.0 | 0.1 | 0.2 | 0.5 | 1.0 | 1.5 | 1.75 |
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CFM | 140 | 128 | 116 | 80 | - | - | - |
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AIR PERFORMANCE CURVE-ILF130
5 In. Duct
AIR PERFORMANCE CURVE-ILF250
6 In. Duct
STATIC PRESSURE |
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INCHES OF WATER | 0.0 | 0.1 | 0.2 | 0.5 | 1.0 | 1.5 | 1.75 |
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CFM | 282 | 270 | 254 | 223 | 137 | 37 | 5 |
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The air delivery of a ventilating system may be determined by:
1.Determine the equivalent duct length for each 90 degree elbow by adding one foot of duct length for each inch of duct diameter, i.e., a 4 inch diameter duct elbow equals
4 feet equivalent duct length and an 8 inch diameter duct elbow equals 8 feet equivalent duct length.
2.Add the total straight length of duct and the equivalent length for each elbow to obtain the total equivalent duct length.
3.Locate the intersection of the fan performance curve and the total equivalent duct length curves and draw a vertical line down to the CFM scale and read the system air performance.
(NOTE: 31⁄4" x 10" duct equals 6 inch diameter duct.)
STATIC PRESSURE |
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INCHES OF WATER | 0.0 | 0.1 | 0.2 | 0.5 | 1.0 | 1.5 | 1.75 |
| Product specifications subject to change without notice. |
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CFM | 161 | 145 | 132 | 88 | - | - | - |
| NuTone, Inc., 4820 Red Bank Road, Cincinnati, Ohio 45227 |
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| Printed in U.S.A. |
