ALORAIR Crawl space Basement Ventilator Fan, VentirPro-S2 with Temperature Humidity Controller (Air-out)

Model : VentirPro-S2

4.9 Average

$109.00 List Price: $199.00

Use the ALORAIR ventilator fan to circulate the air. You will feel drier and more comfortable when cooking, cleaning, or spending time with family and friends. The wind speed adjustment function can quickly and quietly dehumidify.

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Categories:Ventilation Fan

AlorAir 10-Speed Crawlspaces fans 240 CFM, Built to Last
when your home breathes. your breathes easier too

  • Really save space: L x W x H: 18.2" x 9" x 1.7". The fan system allows horizontal or vertical installation.
  • Multi-function control panel: Smart programming can change the fan speed to adapt to changing indoor temp and humidity. In bad weather, the preset alarm can be triggered in time. Ball Bearing Motor can maximize airflow while reducing noise and power consumption.
  • Built to Last: thanks to a Heavy-duty stainless steel frame with IP-44 rated fans it has high water resistance and protection.


  • Wall Adapter Input:100 to 230V AC
  • Operating Voltage:12V DC
  • Power:8.5 W
  • Airflow:0-240 CFM
  • Noise:  48 dBA
  • Functioning Humidity Range: 20 to 100% 
  • Temperature Range:  14- 158°F

Key Design Features

  • Built to Last

The fan system uses a stainless steel mounting frame and an IP44 rated fan, which has high water resistance and protection.can cope with various weather conditions

  • Quiet and Efficient

The double-ball DC motor drives the built-in 120mm double-blade fan, which can move 240 CFM while reducing noise and power consumption, which is better than AC fans

  • Multi-function Control Panel

Adjust the airflow according to the temperature and humidity you set to meet different weather conditions

  • Plug and Play

The Complete kit includes the fan unit, user manual, corded sensor probe, and everything needed to mount the system and power it through an outlet.

What makes us great?

ALORAIR Crawl Space Ventilation and Exhaust Fan

The Crawl Space fan is designed to allow fresh outdoor air to circulate under the house and porch, control the temperature and humidity levels of your crawlspace, basement, attic, and garage.

Excellent performance

Can operate and move a large volume of air with very small noise made. 7-blade and PWM DC-Motor, suitable for continuous operation.

This fan helps you exhaust the air and also saves energy.


Dimensions 18 .2x 9x 1.7 inches
Shipping Dimensions 20 x 11 x 3.7 inches
Power Cord Length 5.5 ft
Noise 0-48 dBA
Operating Voltage 12V DC
Current 0.8 A
Functioning Humidity Range 20~100%
Temperature Range 14- 158°F
Fan Bearings Dual Ball

Ratings Summary

99% Recommend this product of 16 responses

16 Ratings
4.9 Average
5 Stars
500% Complete
4 Stars
400% Complete
3 Stars
NAN % Complete
2 Stars
NAN% Complete
1 Stars
NAN% Complete
Total: 16 Reviews
Reduce moisture and odor
By 'Marian ', Reviewed on 2022-01-11 13:17:28
I purchased this vent fan to help with moisture and odor in my shed. The quality of the fan is great. I really like how you can set the run time and % of humidity. Before if I stored cloth or leather tool bags in my shed they would start to grow something on the surface. With the fan, I can control the moisture in my shed and save my tools.
Technology / simplicity / plug and play
By 'Melissa ', Reviewed on 2022-01-08 13:28:20
Technology and simplicity combined to solve simple fundamental issues. I had been searching for a fan that would turn on and off in correspondence with temperature increase and decrease for ventilation in my attic. Gable vents alone don’t move air and therefore don’t enable attics to keep cool thus making your house hot. I debated hiring an electrician to hard wire thermostat controllers for standard box fans until I found this fan! It’s plug-and-play - simple- and my problems are solved. No electrician is needed. This will keep my attic cool and save me electricity by using a/c less. These fans can also be used and activated with humidity levels. Great for basements or crawl spaces. They are weather-resistant too! I absolutely love these fans.
By 'Rhys Evans ', Reviewed on 2021-07-16 10:58:36
Because of the hot and humid weather, sometimes I can found condensation on the wall. I came across this product by chance, and as it was inexpensive, I bought it to give it a try. However, it really impressed me, the machine made a big difference in removing the condensation, I was really satisfied with it.
Efficient dehumidification
By 'Jessica Miller ', Reviewed on 2021-05-12 19:32:55
This fan installed easily and is actually pretty quiet. The thermostat works well and while it's not totally accurate in terms on actual temp vs markings on the dial. But it does help reduce the humidity in my house.
It is very useful
By 'Ashlyn Magana ', Reviewed on 2021-04-30 10:02:38
I have mine installed just like the picture. The fan has been a great help to my basement, as there is hardly any airflow in and out of the place. The noise level on a fan this big is low and very smooth. The ball bearing has little to no resistance, and the controller is a nice feature for giving off alarms and eco-mode. The eco-mode is great if you just want to set it and forget it. I have mine working this way and even after a power failure, the fan went back to the last setting it had saved. A quality fan for a fair price.
very useful
By 'Iris Flowers ', Reviewed on 2021-04-05 13:45:01
My basement is very damp, which annoy me very much, so I decided to buy an exhaust fan, which controls the temperature and humidity of my basement very well, and I think it is very useful
Good product
By 'Keri Meyers ', Reviewed on 2021-03-15 14:34:07
This is the best ventilation fan I have not used yet. Can be easily installed in my crawl space. Through the digital control, you can set the temperature or humidity, thus increasing the versatility. About a week or two after installing this machine, the humidity in my crawling space dropped. Yes, I would recommend it to my friends.
Very effective ventilation fan
By 'Claire Watson ', Reviewed on 2021-03-08 14:07:47
VentirPro-S2 has left a deep impression on me. The manufacturing quality is very good, the operation is simple, and the price is very reasonable. I plan to buy 2 more. These fans help keep the crawl space dry and bring a much fresher smell to the space. The instructions are clear and easy to understand, so you know how to run it correctly. Overall, a great product.
Great fan for damp basements
By 'Skye Haworth ', Reviewed on 2021-03-01 13:26:41
My basement accumulates a lot of moisture throughout the day. If there is no fan, the wooden structure of the basement will be infested by termites. However, after a few weeks of installation, I noticed that I can breathe more easily and there is less dust around. The fan has temperature and humidity sensors, if set correctly, both can work normally. The base cover is also stainless steel, which is highly resistant to stains or other mold growth.
Impressive unit
By 'Rajveer Rosario ', Reviewed on 2021-02-22 10:35:30
The unit runs well, is relatively quiet, and well ventilated. The function matches the description and is cheaper than other similar units. I have been running it for 2 months and it is still very powerful. My crawl space is not as musty as before. As it will be affected by rain and weather, what impresses me is that it is still running. Will buy another one in the future.


Questions & Answers
Answered by Alorair
The H/L for humidity and temperature need to be set. For more information, call 888-990-7469.
Answered by Alorair
The fan cannot be installed in an area where there is a possibility it could get wet.
Answered by Alorair
Yes, this fan will be the exhaust version and it blow to outdoor.
Where can this ventilator fan be used?

Ash on 2021-08-25 16:29:50

1 Answer

Answered by Alorair
Hi Ash, the Crawl Space fan is designed to allow fresh outdoor air to circulate under the house and porch, control the temperature and humidity levels of your crawlspace, basement, attic, and garage.

1 Answer

Answered by Alorair
Hi Sage, The unit has a double-ball DC motor that drives the built-in 120mm double-blade fan, which can move 240 CFM while reducing noise and power consumption, which is better than AC fans. What's more, the noise of this noise is 0-48 dBA. So, you can don't worry about the noise.

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