Best Crawlspace Foundation Vent Fans in 2025
Updated on July 2025
#1
Recommended
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- Window-style design for easy integration
- Efficient dual fan AC ventilator with 160 CFM airflow
- Sash door activates exhaust fan when opened
- Sealed tightly when vent is closed for optimal performance
- Manufactured in the U.S.A.
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- Window-style design for easy integration
- Efficient dual fan AC ventilator with 160 CFM airflow
- Sash door activates exhaust fan when opened
- Sealed tightly when vent is closed for optimal performance
- Manufactured in the U.S.A.
#2
Value for Money
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- 780 CFM stainless steel ventilation fan designed for crawl spaces, offering dustproof and weatherproof protection to prevent rust.
- Features built-in antifreeze thermostat that halts operation at temperatures below 37°F, enhancing longevity.
- User-friendly knob panel allows humidity adjustment from 10-80%, suitable for areas up to 1300 sq.ft with noise levels below 55 dBA.
- Compact dimensions of 16.1" x 11.8" x 4.5", compatible with various foundation openings and easy to install with included power cord.
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- 780 CFM stainless steel ventilation fan designed for crawl spaces, offering dustproof and weatherproof protection to prevent rust.
- Features built-in antifreeze thermostat that halts operation at temperatures below 37°F, enhancing longevity.
- User-friendly knob panel allows humidity adjustment from 10-80%, suitable for areas up to 1300 sq.ft with noise levels below 55 dBA.
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#3
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- Powerfully ventilates crawl spaces, effectively reducing moisture through existing passive vents
- Standard-sized face plate designed for ventilation openings in brick foundations
- Delivers 220 CFM with a 40-watt maintenance-free exhaust system
- Features dual fans and a large face plate suitable for block foundation ventilation; includes a thermostat, dehumidistat, and pre-wired 6" power cord
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- Powerfully ventilates crawl spaces, effectively reducing moisture through existing passive vents
- Standard-sized face plate designed for ventilation openings in brick foundations
- Delivers 220 CFM with a 40-watt maintenance-free exhaust system
- Features dual fans and a large face plate suitable for block foundation ventilation; includes a thermostat, dehumidistat, and pre-wired 6" power cord
#4
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- Dimensions: 15" x 10.2" x 2.8" with IP-55 rated fans, 540 CFM airflow, and low noise <55dB.
- Durable Construction: Heavy-duty stainless steel designed for moisture reduction and prevention of wood rot, enhancing indoor air quality.
- Effective Filtration: Built-in isolation mesh prevents dust and debris from entering crawl spaces, ensuring long-lasting performance in humid conditions.
- Easy Installation: Designed for crawl spaces, basements, or garages; adjustable faceplate fits non-standard openings; simple plug-and-play setup.
- Contents: Includes 1 VentirPro 540S Air-Out Ventilator Fan, User Manual, and Power Adapter.
- Safety Feature: Integrated thermostats disable the fan when outdoor temperatures drop below 35°F.
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- Dimensions: 15" x 10.2" x 2.8" with IP-55 rated fans, 540 CFM airflow, and low noise <55dB.
- Durable Construction: Heavy-duty stainless steel designed for moisture reduction and prevention of wood rot, enhancing indoor air quality.
- Effective Filtration: Built-in isolation mesh prevents dust and debris from entering crawl spaces, ensuring long-lasting performance in humid conditions.
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#5
5% Off
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- IP-55 Rated stainless steel shell provides superior moisture resistance and durability in damp environments. The isolation mesh effectively blocks reptiles from entering crawl spaces, reducing indoor moisture and safeguarding both structure and health.
- Airflow capacity of 260CFM allows for efficient exchange of indoor and outdoor air, improving air quality and humidity levels. Ideal for exhausting radon gas and other odorous pollutants, ensuring a healthier living environment.
- Compact design (13.4x9.1x2.5 inches) with a 6.7-inch fan and a 6-foot grounded power cord. Easy humidity control via a simple knob allows for quick setup and operation, transitioning from passive to active ventilation seamlessly.
- Automated humidity control with a built-in dehumidistat operates within a range of 5%-80% RH. The fan activates and deactivates based on the preset humidity level, preventing condensation and wood rot in damp areas.
- Equipped with thermostats to halt operation in temperatures below 35°F, ensuring energy efficiency and safety in colder conditions.
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- IP-55 Rated stainless steel shell provides superior moisture resistance and durability in damp environments. The isolation mesh effectively blocks reptiles from entering crawl spaces, reducing indoor moisture and safeguarding both structure and health.
- Airflow capacity of 260CFM allows for efficient exchange of indoor and outdoor air, improving air quality and humidity levels. Ideal for exhausting radon gas and other odorous pollutants, ensuring a healthier living environment.
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#6
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- Crawlspace vent fan with 220 CFM airflow, dimensions of 18" x 9" x 2", and dual fans for effective ventilation
- Built-in humidistat with a range of 20% - 80% RH, exhausts radon gas and odors to prevent them from entering living spaces
- Dehumidistat control ensures fan does not operate in low outdoor temperatures for freeze protection
- Designed for various uses including crawlspaces, basements, attics, and hydroponics, enhancing air circulation and preventing moisture buildup
- User-friendly knob control for easy operation; simply plug in and set the timer for automatic ventilation
- Factory-pre-installed thermostats ensure fan operation is halted when outdoor temperatures drop below 35°F
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- Crawlspace vent fan with 220 CFM airflow, dimensions of 18" x 9" x 2", and dual fans for effective ventilation
- Built-in humidistat with a range of 20% - 80% RH, exhausts radon gas and odors to prevent them from entering living spaces
- Dehumidistat control ensures fan does not operate in low outdoor temperatures for freeze protection
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#7
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- Ventilation fans help lower radon levels in basements and crawl spaces, reduce humidity, and eliminate harmful gases and odors.
- Features dual-fan design for high airflow, with options for exhaust or intake to optimize air exchange; built-in dehumidistat automatically activates based on humidity levels and includes freeze protection.
- Constructed from 100% stainless steel 430, offering high corrosion resistance suitable for humid environments, making it ideal for damp locations.
- Easy to install with included components; features a user-friendly control panel for humidity settings. UL-certified for operational safety.
- Suitable for various applications, including crawl spaces, attics, and foundations, this fan improves air quality, regulates humidity, and mitigates gas and odor migration, contributing to a healthier living environment.
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- Ventilation fans help lower radon levels in basements and crawl spaces, reduce humidity, and eliminate harmful gases and odors.
- Features dual-fan design for high airflow, with options for exhaust or intake to optimize air exchange; built-in dehumidistat automatically activates based on humidity levels and includes freeze protection.
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#8
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- Compact dimensions: 13.4" x 9.1" x 2.5" with an airflow capacity of 260 CFM and noise level below 40dB.
- Durable construction: Made from heavy-duty stainless steel with an IP-55 rating for resistance against dust and liquids.
- Efficient humidity control: Features a humidity regulating button (5%-80%) to maintain optimal indoor air quality and reduce moisture-related issues.
- Easy installation: Suitable for various environments such as crawl spaces, basements, and garages; includes mounting screws and can adapt to non-standard openings.
- Safety and support: ETL certified with a 2-year warranty and professional customer support available for assistance.
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- Compact dimensions: 13.4" x 9.1" x 2.5" with an airflow capacity of 260 CFM and noise level below 40dB.
- Durable construction: Made from heavy-duty stainless steel with an IP-55 rating for resistance against dust and liquids.
- Efficient humidity control: Features a humidity regulating button (5%-80%) to maintain optimal indoor air quality and reduce moisture-related issues.
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#9
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- Crawlspace ventilation fan with airflow rate of 540 CFM for effective air exchange, improving indoor air quality and humidity balance.
- Automatic operation with built-in dehumidistat and freeze protection to manage humidity levels between 5%-80% RH; stops operation below 35°F (3°C) to prevent moisture buildup.
- IP-55 rated isolation mesh and durable aluminum zinc shell designed for humid environments, resisting liquids and dust while increasing air circulation and preventing wood rot.
- Compact and user-friendly design, measuring 15"x 2.8" x 10.2". Easy installation with adjustable faceplate and simple control panel for humidity settings; plug-and-play functionality for continuous operation.
- Equipped with factory pre-installed thermostats to ensure the fan does not operate when outdoor temperatures are below 35°F.
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- Crawlspace ventilation fan with airflow rate of 540 CFM for effective air exchange, improving indoor air quality and humidity balance.
- Automatic operation with built-in dehumidistat and freeze protection to manage humidity levels between 5%-80% RH; stops operation below 35°F (3°C) to prevent moisture buildup.
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#10
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- Stainless steel construction ensures durability with IP55 rating for dust and weather resistance, preventing rust. Enhances air circulation and indoor air quality while effectively venting radon and odors.
- Incorporates an antifreeze thermostat that halts operation below 37°F, and features an 8 mm isolation mesh to block particulates and reduce moisture, extending fan lifespan.
- User-friendly operation with a simple knob to adjust humidity between 5-80%. Covers areas up to 550 sq. ft. with noise levels below 40dBA, ideal for damp environments like crawl spaces and basements.
- Compact dimensions of 12.6" x 8.7" x 2.9" with a 6 ft grounded power cord. Measurement of crawl space essential for proper fit; panels adjustable for non-standard openings.
- Includes VentirMax 300S Air-Out Ventilator Fan, user manual, and power adapter.
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- Stainless steel construction ensures durability with IP55 rating for dust and weather resistance, preventing rust. Enhances air circulation and indoor air quality while effectively venting radon and odors.
- Incorporates an antifreeze thermostat that halts operation below 37°F, and features an 8 mm isolation mesh to block particulates and reduce moisture, extending fan lifespan.
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