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Ultra Silent Duct Fans

Duct fans for noise-sensitive spaces, with optimised blade profiles and sound-attenuating casings. Final selection is confirmed at the duty point (airflow / static pressure / voltage / control mode) and by project verification.

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Filters use nameplate maximum values (max airflow at zero static pressure, max static pressure at zero airflow). Check the actual operating point on the performance curve of each model.

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ModelSizeMax airflowm³/hMax static pressurePaPowerWNoisedB(A)SpeedrpmVoltageV
LWDA-100 (4")S-MWN-04 LWDA-100 (4")S-MWN-04AC Ø100 mm 605 see curve 41 49 2,900 220-240 Details
LWDA-100 (4")U-MWN-03 LWDA-100 (4")U-MWN-03AC Ø100 mm 410 see curve 41 51 3,350 110-120 Details
LWDA-100S-PWN-15 LWDA-100S-PWN-15AC Ø100 mm 319 185 40 25 2,550 230 Details
LWDA-125 (5")S-MWN-04 LWDA-125 (5")S-MWN-04AC Ø125 mm 605 see curve 41 49 2,900 220-240 Details
LWDA-125 (5")U-MWN-03 LWDA-125 (5")U-MWN-03AC Ø125 mm 410 see curve 41 51 3,350 110-120 Details
LWDA-125S-PWN-11 LWDA-125S-PWN-11AC Ø125 mm 319 185 40 25 2,550 230 Details
LWDA-150 (6")S-MWN-04 LWDA-150 (6")S-MWN-04AC Ø150 mm 620 see curve 41 50 2,900 220-240 Details
LWDA-150 (6")U-MWN-03 LWDA-150 (6")U-MWN-03AC Ø150 mm 437 see curve 55 53 3,400 110-120 Details
LWDA-150S-PWN-13 LWDA-150S-PWN-13AC Ø150 mm 556 309 80 27 2,550 230 Details
LWDA-200 (8")S-MWN-04 LWDA-200 (8")S-MWN-04AC Ø200 mm 1,150 see curve 143 57 2,900 220-240 Details
LWDA-200 (8")U-MWN-03 LWDA-200 (8")U-MWN-03AC Ø200 mm 720 see curve 179 61 3,400 110-120 Details
LWDA-200S-PWN-14 LWDA-200S-PWN-14AC Ø200 mm 1,236 391 130 29 2,500 230 Details
LWDA-250 (10")S-MWN-04 LWDA-250 (10")S-MWN-04AC Ø250 mm 1,900 see curve 162 60 2,750 220-240 Details
LWDA-250 (10")U-MWN-03 LWDA-250 (10")U-MWN-03AC Ø250 mm 1,219 see curve 228 62 3,000 110-120 Details
LWDA-300 (12")S-MWN-04 LWDA-300 (12")S-MWN-04AC Ø300 mm 3,150 see curve 320 65 2,900 220-240 Details
LWDA-300 (12")U-MWN-03 LWDA-300 (12")U-MWN-03AC Ø300 mm 1,900 see curve 489 71 3,450 110-120 Details
LWDA-355 (14")S-MWN-04 LWDA-355 (14")S-MWN-04AC Ø355 mm 6,450 see curve 903 68 2,900 220-240 Details
LWDA-355 (14")U-MWN-03 LWDA-355 (14")U-MWN-03AC Ø355 mm 2,130 see curve 260 63 1,720 110-120 Details
LWDA-400 (16")S-MWN-04 LWDA-400 (16")S-MWN-04AC Ø400 mm 7,100 see curve 1,300 71 2,940 220-240 Details
LWDA-400 (16")U-MWN-03 LWDA-400 (16")U-MWN-03AC Ø400 mm 2,500 see curve 440 66 1,780 110-120 Details
Certifications for this product line
FCC ×2CE-LVD ×2CE-EMC
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Ningbo Longwell Electric Technology Co., Ltd. · No. 100 Henan Road, Ditang, Yuyao, Ningbo, Chinasales@longwellfans.com · WhatsApp +86 183 5827 4663 · Mon–Fri 8:30–17:30 (UTC+8), reply within 1 business dayHow to order · Privacy notice
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