There are several factors that need to be considered when choosing a dehumidifier for your crawl space or basement. Most dehumidifier manufacturers recommend a certain number of pints per square footage. While this is one way of getting a better idea of the correct size for you, there are several things to consider in order to ensure you are purchasing the correct dehumidifier for your specific needs.
Crawl spaces are susceptible to moisture intrusion and excessive relative humidity by virtue of their design – a hole in the ground surrounded by soil. Ground moisture is a significant source of dampness and humidity under and around the foundation of the house, even without standing water. Another major source of moisture in crawl spaces is from infiltration. Outside moisture in the air comes through doors, windows, cracks, and other penetrations and imperfections. Experts say about 95% of the moisture entering a building enters through air infiltration. No crawl space is the same and because of this the size of dehumidifier you need may be different than the size your neighbor needs.
The sizing guide below goes beyond square footage and cubic feet to help you identify the best-sized dehumidifier for your home. The first step is to classify your crawl space or basement based on air infiltration and the condition of your foundation. Once you have done this you can visit the Product Comparison Chart to see what Santa Fe Dehumidifier is best for your home.
Classifying Your Crawl Space or Basements
Very tightly Sealed — New homes that meet a recognized energy building standard such as Energy Star, LEED, Passive House, etc… or homes that have a confirmed air leakage of 3 ACH50 or less. Typically newer homes with foundations that have minimal cracks or imperfections.
Moderately sealed — Newer homes or remodeled homes that have some air sealing and foundations with some cracks and imperfections.
Loosely Sealed — Typically older homes with very minimal air sealing and foundations with several cracks and imperfections.