Question about Lomanco PCVI POWER CRAWL SPACE VENT Fan

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Humidity build up in crawl space

Would putting a fan at one end of the crawl space vent to draw outside air in and putting two vent fans on the opposite end help circulate the air so there would be good circulation in the crawl space help to drive the humidity out.

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  • thomas_sm520 Jun 22, 2009

    i have two vents which have a 110 cfi fan in each controlled by a humidstat.The crawl space is 1680 square feet and 5 feet in height.I am considering getting another two fans which are actually two fans on a metal sheet which fits behind a vent controlled by a humidistat.these cans put out 220 cfi!s.if i do put this double fan in where would i put it.

  • thomas_sm520 Jun 22, 2009

    I dont think you realize that my basement structure has cinder blocks so i dont understand how i can have a hinge system,therefore i cant install a door.As far as the cutoff switch i think my humidstat would accomplish that.Now as far as the fans is concerned both of the fans i now have installed at one end of the crawl space are naturally sucking air out which is their purpose.Are you saying that i should install two fans at the opposite end of the crawl space to cause the air to move.We do live in a humid envirement as tennese has that nature.

  • thomas_sm520 Jun 22, 2009

    The one big problem i had was direction of the air flow and by communicating with your experts i found out that the air flow of the fans has to be in one direction rather than putting fans on the side of the crawl space area which would curtail the air flow .Thanks

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The best places is at opposite ends of the crawl space on a hinge system so you can open and close them like doors for easy access.
Put one of them near the outside but backwards so the fan sucks air out instead of in, that will certainly keep the humidity down while working in the crawl space.
If you do erect the fans in this way make sure you install a safety cut out switch on fans for safety and maintenance purposes.


Regards

Posted on Jun 22, 2009

  • Lee Hodgson
    Lee Hodgson Jun 22, 2009

    Hi,
    Yes, one ore two fans at each end will do the job, also installing a ceiling fan in your basement would maximize airflow around the basement as the ceiling fan will push the heat down towards the main extractor fans that you have installed, the hot air can only go one way which is out.
    I wouldn't have the fans sucking in air from the outside as the humidity will only get worse, you need to move the air inside the house as much as possible to keep the humidity down to a comfortable level.


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A fan at one end of the crawl spacecan help, but to vets at the two sides wont work. The fan must rotate in same direction of the vent currently there.
A much better and clever solution is using a de-humidifier near to the unit.

see Buy Dehumidifiers & Portable Dehumidifiers.
regards

Posted on Jun 22, 2009

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