Roof Exhaust Fan, Attic Vent Fan With High-Power Motor, 21 Inch Fan Base Heavy-Duty Aluminum Alloy, Speed Control Adjustable Airflow 500/900 CFM, Compact For Garage,Kitchen,Bathroom, Silver

About these items Efficient Ventilation: All roof exhaust fans are equipped with high - power motors (ranging from 162W to 480W) and varying speeds (1393 - 2200 rpm). They can quickly expel hot air, operate stably, quietly, and energy - efficiently, meeting diverse heat dissipation requirements and ensuring comfort and device safety. Sturdy & Long - Lasting: Constructed with a lightweight aluminum alloy housing cap, deflector, and a sturdy base, these attic exhaust fans are high - strength, corrosion - resistant, and stable. They can endure extreme climates and offer reliable performance over an extended period. Adjustable Airflow Speed: Each garage exhaust fan has two intelligent speed controllers, allowing the airflow speed to be adjusted within specific ranges (500 - 5000 CFM depending on the model). This flexibility helps meet different ventilation needs, balancing comfort and energy efficiency. Sealed Waterproof Design: The kitchen exhaust fans feature a sealed waterproof structure and a deflector for rapid water drainage. This design ensures quiet operation and extended durability, enabling efficient and stable ventilation even in heavy rain and strong winds. Compact Structure: Despite their powerful capabilities, these bathroom exhaust fans (also suitable for various other spaces) have a compact and space - saving body. They are ideal for use in hospitals, schools, hotels, warehouses, agriculture, and restaurants, adapting to different ventilation requirements. Key Differences Model and Power: BT - REF533A: 162W power, item dimensions 24.02 x 24.02 x 16.93 in (610 x 610 x 430 mm), net weight 40.12 lbs (18.2 kg), airflow speed adjustable within 500/900 CFM. BT - REF533B: 220W power, same dimensions as BT - REF533A, net weight 45.86 lbs (20.8 kg), airflow speed adjustable within 900/1500 CFM. BT - REF610A: 300W power, item dimensions 29.53 x 29.53 x 18.70 in (750 x 750 x 475 mm), net weight 58.9 lbs (26.7 kg), airflow speed adjustable within 1500/2600 CFM. BT - REF610B: 360W power, same dimensions as BT - REF610A, net weight 60.85 lbs (27.6 kg), airflow speed adjustable within 3000/3900 CFM. BT - REF610C: 480W power, item dimensions 29.53 x 29.53 x 19.88 in (750 x 750 x 505 mm), net weight 65.26 lbs (29.6 kg), airflow speed adjustable within 4000/5000 CFM. Speed Controller Naming: BT - REF533A, BT - REF533B, and BT - REF610C come with a "Gear Speed Control Switch". BT - REF610A and BT - REF610B come with a "Speed Controller". Specifications BT - REF533A Item Model Number: BT - REF533A Power: 162 W Color: Silver Material: Aluminum Alloy (1060) Net Weight: 40.12 lbs (18.2 kg) Item Dimensions: 24.02 x 24.02 x 16.93 in (610 x 610 x 430 mm) BT - REF533B Item Model Number: BT - REF533B Power: 220 W Color: Silver Material: Aluminum Alloy (1060) Net Weight: 45.86 lbs (20.8 kg) Item Dimensions: 24.02 x 24.02 x 16.93 in (610 x 610 x 430 mm) BT - REF610A Item Model Number: BT - REF610A Power: 300 W Color: Silver Material: Aluminum Alloy (1060) Net Weight: 58.9 lbs (26.7 kg) Item Dimensions: 29.53 x 29.53 x 18.70 in (750 x 750 x 475 mm) BT - REF610B Item Model Number: BT - REF610B Power: 360 W Color: Silver Material: Aluminum Alloy (1060) Net Weight: 60.85 lbs (27.6 kg) Item Dimensions: 29.53 x 29.53 x 18.70 in (750 x 750 x 475 mm) BT - REF610C Item Model Number: BT - REF610C Power: 480 W Color: Silver Material: Aluminum Alloy (1060) Net Weight: 65.26 lbs (29.6 kg) Item Dimensions: 29.53 x 29.53 x 19.88 in (750 x 750 x 505 mm) Package Content BT - REF533A 1 x Roof Exhaust Fan 1 x Gear Speed Control Switch 1 x User Manual BT - REF533B 1 x Roof Exhaust Fan 1 x Gear Speed Control Switch 1 x User Manual BT - REF610A 1 x Roof Exhaust Fan 1 x Speed Controller 1 x User Manual BT - REF610B 1 x Roof Exhaust Fan 1 x Speed Controller 1 x User Manual BT - REF610C 1 x Roof Exhaust Fan 1 x Gear Speed Control Switch 1 x User Manual