ALORAIR 540 CFM IP-55 Grade Crawlspace Ventilation Fans, 8.7 inches with Humidistat & Thermostat | VentirPro 540

  • $83.66


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Product Description

👍【Functions & Applications】With an airflow of 540 CFM and ventilation type of air out, this Ventilator fan is designed for use in damp crawl spaces, basements, attics, and garages to effectively reduce humidity. It improves air circulation to combat condensation and prevent wood rot. Additionally, it serves for exhausting vent radon gas, treating wood gases and odors, and preventing their infiltration into living spaces.

👍【Key Features】Equipped with a built-in dehumidistat and freeze protection thermostat, this High-Flow Powered Ventilator Fan automatically turns ON/OFF based on the SET Humidity % Level within a humidity range of 5%-80%RH. The Dehumidistat control is overridden if the freeze protection thermostat detects low outdoor temperatures (35°F/1.7°C), ensuring optimal performance in varying conditions.

👍【Built-in Isolation Mesh & IP-55 Rated Axial Fan】Featuring an isolation mesh on the back to prevent reptile intrusion into crawl spaces, and an Aluminum Zinc Shell housing an IP-55 rated Axial Fan, this unit is highly resistant to liquids and dust, ensuring durability in humid environments with a long service life.

👍【Easy to Install & Operate Vent Fan】Measuring 15 x 10.2 x 2.8 inches, operating at 115 Vac ~ 50/60 Hz with 0.51 Amps, and emitting noise below 55dB, this Vent Fan offers easy installation and operation. It comes with an 8.7-inch fan and a 6-foot grounded power cord, with the faceplate adjustable to match non-standard foundation openings. Simply plug it in, set it, and enjoy hassle-free operation.

👍【2 Years Warranty & Safety Tested】Our crawlspace ventilation fan is fully compliant with electrical safety standards (ETL). Every AlorAir crawl space fan comes with a 2-year warranty and a professional customer support team ready to assist at any time. Should you have any questions or concerns, you can contact us directly—we are committed to providing you with the best after-sales support.

IMPORTANT: All models come equipped with factory pre-installed thermostats to prevent fan operation when outdoor temperatures drop below 35°F.

AlorAir 540CFM Crawl Space Ventilation Fan

The AlorAir 540CFM Crawl Space Ventilation Fan is an innovative solution engineered for optimal airflow, portability, and efficiency. This fan boasts IP55 certification, ensuring dust and waterproof capabilities, allowing it to operate reliably in any weather conditions. Additionally, this powerful system is equipped with a built-in dehumidifier and anti-freeze thermostat, preventing failures due to low temperatures. With an adjustable humidity range of 5%-80% RH, it's suitable for basements, warehouses, and crawl spaces ranging from 3600-5600 Cu.Ft.

Why do we need a crawl space ventilation fan?

Perpetually enclosed crawl spaces lack essential outdoor air circulation, resulting in the buildup of damp air. This prolonged moisture presence can initiate mold growth and wood decay, weakening its structural integrity. Additionally, damp wood attracts pests like insects and rodents, exacerbating damage through chewing and erosion. Furthermore, airborne mold spores can infiltrate living spaces through floors, gaps, and HVAC systems located in the crawl space, leading to indoor air pollution and potential health risks for your family.


  • Current: 4.1 A
  • Size/Coverage: Up to 1,300 Sq. Ft.
  • Noise Level: <52 dBA
  • Capacity: 120 ppd (Saturation 90°F - 90%), 55 ppd (AHAM 80°F - 60%) 
  • Airflow: 130 CFM, 230 CMH
  • Dimensions (LxWxH): 19.2" x 12.2" x 13.3"
  • Refrigerant: R410A
  • COP: 2.4 L/kWh
  • Power: 115 V/60 Hz
  • Filter: MERV-1
  • Draining: 19.6ft pump pipe drain and 6.5ft gravity drain pipe
  • Functioning Temperature Range: 33.8°F -104°F
  • Functioning Humidity Range: 36~90%
  • Weight: 44 lbs (20 kg)
  • Loading Quantity: 20': 260 Sets; 40': 565 Sets; 40'HQ: 678 Sets

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