You may find that a crawl space fan is precisely what you need to keep your house free of humidity problems. Nearly every home in the country has a small crawl space installed to help reduce the level of humidity in the house, but you must ensure that the crawl space itself is not overly humid. To protect your home from being damaged by humidity, you must take the necessary steps to ensure that your crawl space is not too wet and is maintained at a proper level of dryness.
Using a crawl space dehumidifier is the best way to ensure that your crawl space remains dry and free of humidity. Humidity in the crawl space usually results in mold growth, as well as rat, bug, and mosquito infestations. These things can be a severe health risk, which is one of the main reasons that you need to take the proper precautions to keep your crawl space dry.
Top 5 Best Crawl Space Fan
- A fan system designed to provide ventilation and moisture control for crawl spaces and basements.
- Power ventilate musty, damp crawl spaces through existing passive vents
- A high-airflow fan designed to provide temperature and moisture control for crawl spaces and basements.
- Specifically designed to withstand damp environments
- Air Out. 18" x9" x2”. Dual fans with 6.56 foot grounded power cord. Airflow: 220 CFM. Ventilate a wet crawl space. Exchange the outdoor and indoor air, improve room air quality and balance the humidity.
Last update on 2021-05-08 at 13:01 / Affiliate links / Images from Amazon Product Advertising API
What is a Crawl Space Fan?
A crawl space fan is a relatively simple device, and you can easily find a good one that will help you keep the humidity of your crawl space at a manageable level. You must make the right choice of crawl space fan. However, some homeowners’ that try a crawl space fan find that they are simply not adequate and are forced to use a crawl space dehumidifier.
Preparations for Installing a Crawl Space Fan
Before you can install your crawl space fan, you need to ensure that your crawl space is free of standing water. If your crawl space dehumidifier has been broken or out of commission for a while, you likely have large puddles of water in your crawl space that have built up over time. You can use a crawl space sump pump to help you get all of the standing water out, which will make it easier for your crawl space dehumidifier to work on getting rid of the humidity.
Once the standing water has been pumped out of the crawl space, it is time to evaluate your crawl space to determine the right kind of crawl space fan that you will need. You will need to make sure that all the vents leading into your crawl space are sealed, as a crawl space dehumidifier simply cannot dehumidify an area that is continually having fresh air running through it. Not only will you burn out, you crawl space dehumidifier faster, but you will also run your crawl space fan 24/7 and burn that out as well. Of course, regardless of which one you have, a crawl space dehumidifier or a crawl space fan, or both, you will rack up some pretty huge electricity bills.
Finding the Right Crawl Space Fan
Finding the right crawl space fan is not too difficult, but it will require a good amount of work on your part. The first thing that you need to do is determine how humid and damp your crawl space is:
- Standing water means that your crawl space is very wet
- The smell and feel of your crawl space are of water, and mildew and mold are growing in many places around your crawl space. This makes it a wet crawl space.
- Dampness and smell of moisture rank your crawl space as very damp and usually crawl spaces that hold a water heater are considered very damp.
- A moderately damp crawl space only smells and feels damp when the weather is very humid, but there is nothing that indicates water leakage or seepage.
Each type of humidity and dampness of crawl space will require a different kind of crawl space dehumidifier, and you must evaluate what the conditions of your crawl space are before you go out and purchase your crawl space fan.
Next, you need to determine how many changes of air there will be every hour, which will be determined according to the humidity of your crawl space:
- Extremely wet crawl spaces have six changes per hour
- Wet crawl spaces have five changes per hour
- Very damp crawl spaces have four changes per hour
- Moderately damp crawl spaces have three changes per hour
Using the above guidelines, it is time to measure the crawl space to determine what size of crawl space dehumidifier you will need. Measure your crawl space to obtain the height, width, and length of the area. Multiply these together to calculate how many cubic feet of space your crawl space has.
Once you have obtained the measurements of the crawl space, you need to calculate the airflow that the crawl space dehumidifier will be handling. To do that calculation, you will multiply the cubic feet of the crawl space by the number of air changes that will be processed. That number is then divided by 60 to determine the number of cubic feet per minute that your crawl space dehumidifier will need to handle.
Your crawl space is 1500 square feet, and you require five air changes for your wet crawl space.
1500 x 5 = 7500
7500 divided by 60 = 125
Your crawl space dehumidifier will need to handle 125 cubic feet of air per minute.
Once you have obtained the final number, simply take that shopping to find the crawl space dehumidifier that will do the job. Once you have installed the correct crawl space fan, you will see that it is very effective at keeping your crawl space dry and free of mold, mildew, rodents, flies, and other insects.
As you can see, a crawl space dehumidifier is a vital part of keeping your house in proper order, and you must use one to protect your health. You may find that a crawl space fan being installed in your crawl space will help your house to remain in good condition, and you can easily find a crawl space fan for a reasonably low price.