Customer: Endorfy
Fluctus 140 OS
| Test Environment | Hemi-Anechoic Chamber with 6 dB(A) noise floor | |
| Conditions | 25(±2) degrees Celsius, 40-50% humidity | |
| Sound Analyzer | Bruel & Kjaer 2270-S G4 & 2250-L G4 | |
| Microphone | Bruel & Kjaer Type 4955-A | |
| Mic Calibrator | Bruel & Kjaer Type 4231 | |
| Data Logger | Picoscope TC-08 | Testing Methodology | Cybenetics Phi Fan Performance Standard |
| Manufacturer | Long Win Science & Technology Corporation |
| Model Number | LW-9266 |
| Air Flow Rate | 2.4 – 250 CFM |
| Accuracy of Air Flow Rage | < 3.5% INFS |
| Repeatability error | < 2% |
| Static pressure | 0-20mmAq (100mmAq with the high static pressure throttle device) |
| Overall Dimensions | 0.7 (W) x 2.2 (L) x 1.6 (H) m |
| Power Source | 220VAC, 5A, Single Phase, 50/60Hz |
| Based on Standards | ISO 5801-2007, AMCA 210-0, ASHRAE 51-2007, IEC 61591-2005, GB/T 1236-200 |
| 25dBA | P Max | 1.15 |
| 25dBA | Q Max | 63.26 |
| Model Name | Endorfy |
| Serial Number | 10-10152401006454 |
| Lab ID | EY14000206 |
| Comments | |
| Date of receipt | Aug 27, 2025 |
| Report Issued Date | Aug 29, 2025 |
| Testing Date | Aug 29, 2025 |
| Engineer Name | - |
| Authorized By the Laboratory General Manager | Aristeidis Bitziopoulos |
| Signature |  |
The Fan Static Pressure Measurement’s Uncertainty is ±0.68 Pa
The reported expanded uncertainty (U) was derived as the product of the combined standard uncertainty (u) and the coverage factor k = 2, corresponding to a confidence interval of approximately 95%. Measurement uncertainty was determined in accordance with JCGM Guide 100:2008, "Guide to the Expression of Uncertainty in Measurements". The estimate of the reported uncertainty pertains to values obtained during the measurements and does not account for possible long-term changes.
Static Pressure Uncertainty Budget
| Source of Uncertainty | Standard Uncertainty, u(xi) (Pa) |
| LW-9266 Instrument Accuracy | 0.260 |
| Repeatability | 0.075 |
| Calibration | 0.012 |
| Temperature influence | 0.208 |
| Relative Combined Standard Uncertainty (RSS): | 0.34 |
| % Expanded Uncertainty U (k=2, norm): | 0.68 |
The Fan Airflow Measurement’s Uncertainty is ±3.94 CFM
The reported expanded uncertainty (U) was derived as the product of the combined standard uncertainty (u) and the coverage factor k = 2, corresponding to a confidence interval of approximately 95%. Measurement uncertainty was determined in accordance with JCGM Guide 100:2008, "Guide to the Expression of Uncertainty in Measurements". The estimate of the reported uncertainty pertains to values obtained during the measurements and does not account for possible long-term changes.
Fan Airflow Uncertainty Budget
| Source of Uncertainty | Standard Uncertainty, u(xi) (CFM) |
| Repeatability | 1.750 |
| LW-9266 calibration | 0.600 |
| Environmental variation | 0.500 |
| Position error | 0.482 |
| Relative Combined Standard Uncertainty (RSS): | 1.97 |
| % Expanded Uncertainty U (k=2, norm): | 3.94 |