The AlorAir VentirPro 540S exhausts 540 CFM through a foundation vent from a stainless steel housing, for crawl spaces of 3,600ft³ to 5,600ft³. Choose it over the 540 where the space stays wet and corrosion is a concern.
The humidistat knob runs it only when humidity is above your setting, and a freeze thermostat stops it below 35°F outdoors. It draws 0.51 A at 115 V, with an IP55 motor and a stainless insect mesh.
Features
Stainless Steel Housing
A stainless steel body for long service in wet crawl spaces and basements, where plain steel would rust.
540 CFM Exhaust
Moves 540 CFM out of the crawl space, sized by AlorAir for 3,600ft³ to 5,600ft³. Draws 0.51 A at 115 V.
Humidistat Control
Turn the knob to a humidity level between 10% and 80% RH; the fan runs only while the crawl space is above it.
Freeze Protection Thermostat
The fan won't run below 35°F outdoors, and restarts as it warms to near 50°F.
IP55 Rated Motor
Sealed against dust and water jets for a damp crawl space, with overload protection.
Stainless Insect Mesh
Blocks crawling pests with bodies larger than 0.14" from entering the fan and the house.
Mounts Over the Vent
A metal mounting plate fixes over an existing foundation vent with four screws; it can be trimmed to fit.
Specifications
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Model: VentirPro 540S
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Airflow: 540 CFM
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Sized For: 3,600ft³ to 5,600ft³
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Voltage: 115 V, 60 Hz
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Rated Current: 0.51 A
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Humidistat: Knob, 10% to 80% RH
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Freeze Protection: Stops below 35°F outdoors, restarts near 50°F
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Motor Protection: IP55
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Insect Mesh: Stainless steel
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Housing: Stainless steel
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Power Cord: 6'
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Noise: Less than 55 dBA
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Dimensions: 15"L x 10.2"W x 2.8"H
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Weight: 6.2 lbs
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Certifications: ETL
What's Included
- AlorAir VentirPro 540S ventilation fan with mounting plate
- Wall anchors and machine screws (4 each)
- Installation and user manual
Setup & Placement
Install it behind an existing foundation vent, at least 3' from a corner of the building, with the control box and motor facing into the crawl space. You need a grounded outlet within 6' and a 5/16" nut driver; add a drill with a 5/16" masonry bit for brick or block.
Remove the existing vent cover, hold the fan over the opening and mark the four corners of the mounting plate. On block or brick, drill 5/16" holes, fit the wall anchors and screw the plate on; on wood framing or an existing vent frame, use screws, washers and nuts. If the plate needs trimming to fit, keep clear of the power cord.
Resources
Shipping, Returns & Warranty
Ships direct from AlorAir's U.S. warehouse, with free shipping on orders over $100.
Inspect the packaging and the product before you sign. Note any damage or shortage on the delivery receipt, then email photos to support@mycleansupplies.com within 48 hours of delivery so the freight claim can be filed. Damage reported after 48 hours can't be claimed.
Unused AlorAir equipment in its original packaging can be returned within 21 days of delivery. Ask us for a return authorization before you ship. Returns that aren't due to a defect carry AlorAir's 20% restocking fee, and you pay the return shipping. If the unit is defective, AlorAir covers the return shipping. Payment processing fees are not refunded. Used or contaminated units and special-order items can't be returned.
Backed by AlorAir's 12-month limited warranty from the date of delivery, covering defects in materials and workmanship. AlorAir handles warranty service directly, so keep your proof of purchase and the original packaging.
About AlorAir
AlorAir Solutions is based in Chino, California, and supplies dehumidifiers, ventilation fans and air scrubbers for crawl spaces, basements and restoration work. Its crawl space ventilation fans mount over an existing foundation vent and run on their own controls to move damp air out from under the house.
The VentirPro series is AlorAir's knob-controlled crawl space fan line. The VentirMax series adds stainless steel housings as standard, with a digital programmable controller on the SD models, and the VentirPro-S2 uses two DC fans with a digital controller and an external probe. For a sealed, encapsulated crawl space, AlorAir's Sentinel dehumidifiers are the alternative to ventilation.
