Description
Low Noise Square Wall Axial Fan
Wall-mounted industrial axial fan with aluminum alloy impeller, direct-drive motor and protective gravity louver. Fast and efficient air extraction for workshops, warehouses, equipment rooms, basements and commercial buildings.
Why Choose the LWWAF Series
Engineered for industrial ventilation: high airflow, low noise, direct-drive reliability, and durable square housing for wall opening mounting.
Aluminum Alloy Impeller
Aerodynamically optimized blade angles and curved surfaces deliver higher, more stable airflow with lower energy consumption.
Powerful Air Extraction
Quickly removes hot, stale and odorous air to improve airflow and create a more comfortable working environment.
Direct-Drive Motor System
Motor directly drives the impeller — no belts, no transmission loss, lower maintenance burden for continuous duty.
Durable Square Housing
Industrial-grade square housing secures the wall-mounted installation and keeps aisles and floor space clear.
Product Specifications
LWWAF Series overall & mounting dimensions across 10 frame sizes — from LWWAF-2.5A (340×340 mm) to LWWAF-8A (885×885 mm).
| Model | L1 Mounting Frame (±5 mm) | L2 Flange Frame (±5 mm) | L3 Overall Fan Height (±5 mm) |
|---|---|---|---|
| LWWAF-2.5A | 340 | 400 | 315 |
| LWWAF-2.8A | 370 | 430 | 315 |
| LWWAF-3.2A | 390 | 450 | 315 |
| LWWAF-3.6A | 430 | 490 | 345 |
| LWWAF-4A | 475 | 535 | 345 |
| LWWAF-4.5A | 530 | 590 | 365 |
| LWWAF-5A | 580 | 640 | 365 |
| LWWAF-5.6A | 650 | 710 | 345 |
| LWWAF-6.3A | 690 | 750 | 345 |
| LWWAF-7.1A | 800 | 860 | 445 |
| LWWAF-8A | 885 | 945 | 545 |
| Model | Frame Dimensions | Airflow (m³/h) | Total Pressure (Pa) | Power (kW) | Speed (r/min) | Noise dB(A) |
|---|---|---|---|---|---|---|
| LWWAF-2.5A-0.025-4P-1-001 | 340×340 | 600 | 40 | 0.025 | 1450 | ≤57 |
| LWWAF-2.5A-0.025-4P-1-002 | 340×340 | 800 | 42 | 0.025 | 1450 | ≤58 |
| LWWAF-2.5A-0.04-4P-1-003 | 340×340 | 1000 | 64 | 0.04 | 1450 | ≤58 |
| LWWAF-2.8A-0.04-4P-1-001 | 370×370 | 950 | 41 | 0.04 | 1450 | ≤55 |
| LWWAF-2.8A-0.04-4P-1-002 | 370×370 | 1230 | 45 | 0.04 | 1450 | ≤60 |
| LWWAF-2.8A-0.06-4P-1-003 | 370×370 | 1650 | 58 | 0.06 | 1450 | ≤60 |
| LWWAF-3.2A-0.04-4P-1-001 | 390×390 | 1720 | 56 | 0.04 | 1450 | ≤61 |
| LWWAF-3.2A-0.06-4P-1-002 | 390×390 | 1940 | 62 | 0.06 | 1450 | ≤62 |
| LWWAF-3.2A-0.09-4P-1-003 | 390×390 | 2250 | 68 | 0.09 | 1450 | ≤63 |
| LWWAF-3.6A-0.06-4P-1-001 | 430×430 | 2010 | 65 | 0.06 | 1450 | ≤62 |
| LWWAF-3.6A-0.09-4P-1-002 | 430×430 | 2480 | 73 | 0.09 | 1450 | ≤63 |
| LWWAF-3.6A-0.12-4P-1-003 | 430×430 | 3370 | 76 | 0.12 | 1450 | ≤63 |
| LWWAF-4A-0.12-4P-1-001 | 475×475 | 3540 | 89 | 0.12 | 1450 | ≤62 |
| LWWAF-4A-0.18-4P-1-002 | 475×475 | 4080 | 95 | 0.18 | 1450 | ≤63 |
| LWWAF-4A-0.25-4P-1-003 | 475×475 | 4470 | 109 | 0.25 | 1450 | ≤63 |
| LWWAF-4.5A-0.18-4P-1-001 | 530×530 | 4510 | 114 | 0.18 | 1450 | ≤64 |
| LWWAF-4.5A-0.25-4P-1-002 | 530×530 | 5870 | 121 | 0.25 | 1450 | ≤65 |
| LWWAF-4.5A-0.37-4P-1-003 | 530×530 | 6360 | 139 | 0.37 | 1450 | ≤66 |
| LWWAF-5A-0.25-4P-1-001 | 580×580 | 6170 | 135 | 0.25 | 1450 | ≤65 |
| LWWAF-5A-0.37-4P-1-002 | 580×580 | 6920 | 142 | 0.37 | 1450 | ≤66 |
| LWWAF-5A-0.55-4P-1-003 | 580×580 | 7890 | 147 | 0.55 | 1450 | ≤68 |
| LWWAF-5.6A-0.37-6P-1-001 | 650×650 | 6400 | 78 | 0.37 | 960 | ≤69 |
| LWWAF-5.6A-0.37-6P-1-002 | 650×650 | 7410 | 82 | 0.37 | 960 | ≤69 |
| LWWAF-5.6A-0.37-6P-1-003 | 650×650 | 8060 | 94 | 0.37 | 960 | ≤70 |
| LWWAF-6.3A-0.37-6P-1-001 | 690×690 | 9760 | 92 | 0.37 | 960 | ≤70 |
| LWWAF-6.3A-0.37-6P-1-002 | 690×690 | 10570 | 102 | 0.37 | 960 | ≤70 |
| LWWAF-6.3A-0.75-6P-1-003 | 690×690 | 12000 | 118 | 0.75 | 960 | ≤72 |
| LWWAF-7.1A-0.75-6P-1-001 | 800×800 | 12400 | 132 | 0.75 | 960 | ≤72 |
| LWWAF-7.1A-1.1-6P-1-002 | 800×800 | 13430 | 146 | 1.1 | 960 | ≤75 |
| LWWAF-7.1A-1.1-6P-1-003 | 800×800 | 15240 | 169 | 1.1 | 960 | ≤73 |
| LWWAF-8A-1.5-6P-1-001 | 885×885 | 15750 | 189 | 1.5 | 960 | ≤73 |
| LWWAF-8A-1.5-6P-1-002 | 885×885 | 17050 | 208 | 1.5 | 960 | ≤73 |
| LWWAF-8A-2.2-6P-1-003 | 885×885 | / | 242 | 2.2 | 960 | ≤74 |
Powerful Air Extraction
The LWWAF low noise square wall axial fan continuously removes hot, stale and odorous air from workshops and equipment rooms, accelerating indoor air circulation and creating a more comfortable working environment.
The aerodynamic aluminum alloy impeller generates a high airflow rate with concentrated jet action — ideal for clearing heat buildup near ovens, furnaces, machining cells, and welding stations.
- High airflow performance — up to 17,050 m³/h at the largest 8A frame
- Fast exhaust capability — quickly clears hot air, fumes and odors
- Improves indoor ventilation — replaces stale air with fresh outdoor air
Aluminum Alloy Impeller
The aerodynamically optimized impeller features carefully designed blade angles and curved surfaces, delivering higher, more stable and concentrated airflow while reducing operating load and energy consumption.
Aluminum alloy keeps the impeller lightweight, corrosion-resistant, and balanced for low vibration — even at continuous 1450 r/min or 960 r/min duty cycles across all 10 frame sizes.
- Aerodynamic blade design — optimized for high-efficiency airflow
- Lightweight alloy — reduces motor load and bearing wear
- Corrosion resistant — long service life in humid environments
Protective Louver Design
The outlet louver helps prevent rainwater, debris and outdoor airflow from entering the building, improving reliability in wall-mounted applications.
Each louver blade is gravity-tilted to auto-close when the fan is off — blocking rain, leaves, dust and reverse wind without compromising airflow when running. The aluminum alloy louver matches the housing for a unified, industrial finish.
- Rain-shielding — gravity blades close to prevent water ingress
- Debris-blocking — stops leaves and dust entering the inlet
- Blocks outdoor airflow — eliminates reverse drafts when idle
Space-saving Wall Installation
The square housing is designed for installation in a reserved wall opening, keeping aisles and equipment areas clear while saving valuable floor space.
Mounted through a pre-cut wall sleeve, the LWWAF leaves floor space free for workers, forklifts and equipment — particularly valuable in tight production cells, basements, and equipment rooms where every square meter counts.
- Wall opening mount — fits standard reserved wall sleeves
- Floor space free — no pedestal or floor stand required
- Indoor & outdoor outlet — reversible airflow direction for supply or exhaust
Low Noise, Stable Operation
The optimized fan structure helps reduce vibration and operating noise, making it suitable for continuous ventilation in workshops, warehouses and equipment rooms.
Balanced aluminum alloy impeller, direct-drive motor coupling, and rigid square housing combine to keep vibration low and noise levels between ≤57 dB(A) and ≤75 dB(A) across all 31 configurations.
- Optimized blade geometry — smoother airflow, less turbulence
- Direct-drive coupling — no belt rattle or vibration
- Continuous duty rated — for 24/7 workshop ventilation
Wide Industrial Applications
From factory floors to basements, the LWWAF handles general ventilation duties across 12+ industrial and commercial environments.
Factory Workshops
Removes heat, fumes and dust from production lines.
Warehouses & Logistics Centers
Continuous air circulation in storage and distribution halls.
Equipment & Mechanical Rooms
Heat extraction from server, chiller and HVAC plant rooms.
Power Distribution Rooms
Maintains ambient temperature around switchgear and transformers.
Basements & Underground Spaces
Exhausts stagnant air from car parks and underground facilities.
Commercial & Public Buildings
Wall-mounted ventilation for retail, sports and exhibition halls.
LONGWELL — Trusted Industrial Fan Manufacturer Since 1990
Founded in 1990 in Yuyao, Ningbo — the heart of China’s advanced manufacturing belt — LONGWELL has grown from a precision fan component workshop into a vertically integrated ventilation technology group. Today we engineer AC, DC and EC fan and motor systems with 4,000 m²+ of manufacturing floor, dedicated aerodynamics and CFD simulation labs, and a global export network spanning Europe, the Americas and Asia-Pacific.
From material selection to final balancing, every LONGWELL fan is built on automated lines, computer-balanced impellers and 100% run-test before shipment. We are certified to ISO 9001:2015 and ISO 14001, with CE, UL/ETL, RoHS and EAC compliance, and performance tested to the AMCA 210/211 method.
Production & Delivery
Automated lines, computer-balanced impellers and 100% run-test ensure every LWWAF fan ships ready for installation.
Global Market & Client Preference
LWWAF series is the preferred wall-mounted ventilation fan for HVAC distributors, EPC contractors and OEM clients across Europe, the Middle East, Southeast Asia, and South America.
Trusted by Leading Global HVAC Brands
24+ HVAC OEMs and EPC contractors rely on LONGWELL for industrial ventilation fans every year.
Complete Range of Professional & Certified
LONGWELL fans are independently certified to international quality, safety and energy-efficiency standards.
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View Product →Frequently Asked Questions
Quick answers about the LWWAF low noise square wall axial fan series.
What is the LWWAF series fan designed for?
The LWWAF series is a square wall-mounted axial fan designed for general industrial ventilation in workshops, warehouses, equipment rooms, power distribution rooms, basements, commercial buildings, and chemical/paint facilities. It is NOT explosion-proof — for hazardous areas, see our EX series.
How many frame sizes does the LWWAF series offer?
The LWWAF series comes in 10 frame sizes ranging from 340×340 mm (LWWAF-2.5A) to 885×885 mm (LWWAF-8A), with 31 model variants covering airflow from 600 m³/h to 17,050 m³/h.
How loud is the LWWAF fan during operation?
Noise levels range from ≤57 dB(A) for the smallest 2.5A frame at 1450 r/min to ≤75 dB(A) for the largest 7.1A and 8A frames at 960 r/min. The optimized blade geometry and direct-drive motor reduce vibration, making the LWWAF suitable for continuous duty near workstations.
What is the difference between LWWAF and the EX-WF explosion-proof series?
LWWAF is a general-purpose industrial wall fan for ventilation of non-hazardous areas. EX-WF is an explosion-proof (ATEX/IECEx) version with flameproof enclosure, designed for Zone 1 and Zone 2 hazardous locations. Choose LWWAF for normal workshops; choose EX-WF for oil & gas, chemical, or paint facilities where flammable vapors may be present.
Can the LWWAF be installed outdoors?
Yes. The LWWAF is designed for wall opening installation with both indoor-outlet and outdoor-outlet configurations. The aluminum alloy gravity louver at the outlet prevents rainwater, debris, and reverse outdoor airflow from entering the building, so the fan can be safely installed on exterior walls.
What material is the impeller made of?
The impeller is made of aluminum alloy with aerodynamically optimized blade angles and curved surfaces. This delivers higher and more concentrated airflow while reducing operating load and energy consumption.
Does the LWWAF use belt drive or direct drive?
The LWWAF uses a direct-drive motor coupled straight to the impeller. This eliminates belt wear, power transmission loss, and routine belt replacement, simplifying maintenance compared with belt-driven wall fans.
How much wall opening does the LWWAF require?
The required wall opening equals the L2 flange frame dimension (±5 mm): 400 mm for LWWAF-2.5A up to 945 mm for LWWAF-8A. A mounting frame (L1) is also available from 340 mm to 885 mm for flush-mounting. Detailed dimensions are in the product specification table.
Is the LWWAF energy-efficient?
Yes. Direct-drive coupling eliminates belt transmission losses, and the optimized aluminum alloy impeller delivers the required airflow at lower motor power. Power consumption ranges from 0.025 kW (LWWAF-2.5A) to 2.2 kW (LWWAF-8A), allowing you to size the fan precisely to your ventilation load and avoid over-spec energy waste.
What is the typical lead time for the LWWAF series?
Standard LWWAF models in 10 frame sizes ship within 7-15 working days from order confirmation. Custom voltage, frequency, color, or special louver specifications are available on request, typically adding 10-15 working days.
Need a Quote or Custom Specs?
Tell us your airflow, static pressure, and installation requirements — our engineers will size the right LWWAF model and quote within 1 business day.
