ATMOX Intake Fan – 220 CFM – Internal Mount

Item:  01-370-071

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Crawl Space Vent Fan – Internal Mount – Intake Fan

The crawl space vent fans mount from the inside of the crawl space behind most standard vent openings. A benefit to internal mounting is allowing for unique or aesthetic vent covers to remain. However, a grill can be provided to cover crawl space vent opening, if needed. These fans bring in fresh outside air when conditions are met. This fresh outside air will effectively dry the crawl space through the majority of the year and will improve the indoor air quality of the crawl space and in turn the home. In addition, these vent fans are great for use in spaces with internal walls or home additions which have hard-to-reach areas. The use of these fans in these spaces helps increase air flow in areas that wouldn’t otherwise be reached. The crawl space vent fans are for use in both vented and encapsulated crawl spaces.

How the System Works

The crawl space ventilation fans are one component of the ATMOX System. The system uses an ATMOX controllerfans and/or dehumidifier for the actual drying or moisture control. However, the ATMOX setup is not just fans and/or a dehumidifier. The ATMOX System is a smart solution using the  ATMOX ACE Controller, the brain of the system, to determine the best operation to improve conditions within your crawl space. It does this through analysis of the combinations of dew point, temperature, and humidity. Therefore, the components will only run at optimal times. The system is focused not only on removing excess moisture but also on air quality and energy efficiency.

Powering the Fans

The ATMOX controls use a low voltage 12V DC wire to power the fans. This means the setup of all components (not including a dehumidifier) will run from one electrical outlet. This allows for simple installation, and minimizes or eliminates the need for an electrician at the installation. When using with the ACE Controller, the intake fans will run only at optimal times.

An AC Adapter powers these fans in a standard outlet, so in this setup the crawl space fans will run continuously.

Assembled in USA from domestic and foreign parts. Includes 3-year limited product warranty.


  • Output: 220 CFM
  • Nominal: 1.1 at 12V DC
  • Usage: 15 Watts
  • Noise:  34dB
  • Power: 2.1mm Jack (Center Negative)
  • Mounting:  Plate mounts from inside crawl space

Spec Sheet – Intake Fan – 220 CFM – Internal Mount