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Home > Crawl Space Ventilation > Crawl Space/Foundation Ventilator 110 CFM

Crawl Space Ventilator

Crawl Space/Foundation Ventilator 110 CFM
Crawl Space/Foundation Ventilator 110 CFMCrawl Space/Foundation Ventilator 110 CFMCrawl Space/Foundation Ventilator 110 CFM
AvailabilityUsually ships the same business day
Sale Price$135.00
This Item Qualifies For Free Ground Shipping


This crawlspace ventilator is no longer available. Please see our other crawlspace fans.

Excessive Amounts Of Moisture Is Bad For Your Home:
Protect your home from moisture. That's right, excessive moisture in your crawl space can destroy your home. Foundation ventilators, also known as crawl space vents play an important part minimizing potential wood decay to your home's foundation.  Improperly ventilated crawl space areas can lead to an increase of wood rot, and moisture problems in the living areas of your home. Homes located in humid areas require you to provide and maintain adequately ventilated crawl spaces. A crawl space vent system, in addition to venting moisture vapor, serves to vent out other gases, such as those formed from residues in termite treatment, treated wood, and radon gases. The crawl space vent system protects the structure of the house and the health of its occupants.

The Cure For The Problem:
To aid natural crawlspace ventilation, mechanical ventilation should exchange the crawlspace air at least four times an hour or once complete air exchange every 15 minutes. To determine this, multiply the square footage of the crawlspace by the height to calculate the cubic feet of the crawlspace and then divide by 15 to determine the CFM needed to properly ventilate your crawl space.

Eliminate The Problem By Using The Formula Below:

Length x width x height = total cubic feet of crawl space
Divide = total cubic feet of crawl space /15 = CFM needed for proper foundation ventilation.

40' x 40' x 2' crawl space = 3200 cubic feet of area
divide 3200 cubic feet by 15 =   213 cubic feet per minute (cfm) of air flow needed to ventilate your crawl space

Which Tells You How Much CFM You'll Need:

The Crawl Space Ventilator listed below Is Rated At 110 cfm for each unit.  Therefore, in our example above, 2 units would be required to properly ventilate a crawl space of this size. 
As with all powered exhaust systems, proper intake air vents should be used. Generally, one air intake vent is recommended as a minimum for air intake. Having 3-4 intake vents would be ideal. These crawl space ventilator should be installed on opposite ends of the intake vents, to allow air movement across the entire space to be ventilated.

The Lomanco powered crawl space vent creates a powered ventilation system for crawlspaces that can be utilized in both old and new construction.  The foundation vent fan is designed to be mounted behind any new or existing crawlspace vent. Its operation is controlled with a temperature switch/humidistat control which activates the motor at or above 50F and is user adjustable for the varying levels of relative humidity in your crawlspace. By incorporating the crawlspace vent into your homes crawlspace ventilation system, you can help stop mold growth, mildew, rot, pest /insect infestation and decrease high humidity levels while increasing the overall airflow within your foundation.

Our Review Of The Lomanco Crawl Space Ventilator:
A solid performer with virtually no problems whatsoever. The humidity sensor makes operation automatic, set it and forget it. These crawl space fans are made in the United States and come with a one year limited warranty. We guarantee 100% complete satisfaction on your purchase. This is a stocked item that ships the same business day ordered, from our warehouse (orders must be received by 4 pm PST).


  • Quiet 110 Cfm Ball Bearing Motor
  • Super Tough Polypropylene Construction
  • Dries Crawlspace Gradually
  • Humidity Sensor For Worry Free Operation
  • Thermostat Shuts Fan Off At Low Temperatures
  • U.L. Approved Means Assured Safety
  • Can Help Stop Mold Growth
  • Upgrades Your Present Foundation Vent
  • Easy Installation In A Variety Of Constructions
  • Mounts Behind Foundation Vent For Invisible Operation
  • Quick And Simple Solution For Under ventilated Crawlspaces
  • One Year Limited Warranty


  • Dimensions:  9" x 19" x 3"
  • Each Fan Ventilates: 1650 cubic feet
  • Opening Size: 8" x 16"
  • Power Consumption: 120VAC 69Hz 0.2 Amps - 24 watts.
  • Cord Length: 17"

Download: Lomanco Powered Crawl Space Ventilator Installation Instructions


Learn more about the PCV1 Crawl Space Ventilator by watching this video:



Question: I live in N.J. where I would install these but I go to Florida in the winter should I leave them on.
Answer: This crawl space foundation ventilator has a built in thermostat and humidistat so you can have the fan run year round.
Question: This doesnt let outside air in does it? Cause my vents in my crawl space are closed right now because we had moisture problems last summer and we were told to keep them closed this summer cause humidity like to come inside. So I wonder if this fan let in outside air of just removes crawlspace air?
Answer: The crawl space ventilator will remove the air from the crawl space but, you do need to have open vents to bring in fresh air into the crawl space.
Question: Do you have to have an open intake vent?
Answer: Yes.
Question: Can you tell me the decibel rating for the fan?
Answer: The fan operates quietly but does not have a sound level rating.
Crawl Space/Foundation Ventilator 110 CFM
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