Crawl Space Humidistat


This crawl space humidistat automatically switches on the fan after humidity levels rise above a pre-set limit. It prevents the growth of mold by ensuring that humidity levels never exceed 50%.

  • Turns fan on when humidity rises above a pre set limit.
  • Usually set at 50% humidity.
  • Mold will not grow when humidity is less than 50%.
  • Place unit in crawl space problem area.
  • Settings ON-OFF, Range 45% to 90% humidity.
  • Install unit in a dry location only, floor joist.
  • Disconnect high voltage before servicing.
  • Rating: 110V-230V
    VAC: Max 2KWH
    ≤ 18.2A @50HZ-60HZ
  • Shipping Weight: 1.00 lbs
  • Shipping Dimensions: 8" x 8" x 8"
Price: $99.99
  • Better Business Bureau Accredited Business
  • International Code Council Member
  • Tidewater Builders Association Member
  • Tidewater Builders Association Green Council Member

Why buy a crawl space door, flood vent,
air vent, or portable fan system?

  • Save Money

    Save Money

    Save money on your utility bill with our ventilation, door, fan and vent cover products. You can save money on your flood insurance premiums with our FEMA compliant flood vent.

  • Protect Your Home

    Protect Your Home

    Moisture in the crawl space rots the wood under your home. Reduce the moisture in your crawl space with our crawl space doors, louvers, flood vents and portable exhaust fans.

  • Protect Your Family

    Protect Your Family

    A damp crawl space is unhealthy. Mold thrives in damp areas causing millions of airborne mold spores to enter your home. Toxic mold spores can be deadly to children and those with allergies and COPD.

  • Save Energy

    Save Energy

    Use our crawl space air vents and doors to ventilate your crawl space with natural air flow or forced air with our energy efficient exhaust and portable fans.

  • Save The Environment

    Save The Environment

    Reducing the moisture in your crawl space reduces mold that releases airborne mold spores into the environment.

  • Green Crawl Space

    Green Crawl Space

    Ventilate your crawl space with natural air flow with our crawl space air vents, louvers, and exhaust fans.

Check out our crawl space videos