Why Use a Foundation Vent?
As the name suggests, foundation vents are installed at the foundation of a home. Their purpose is to promote air circulation in a basement, cellar or crawlspace. Allowing for proper circulation prevents excessive moisture buildup, which can cause mold, rot and structural damage over time. Installed foundation vents can be opened to improve air quality in a basement or closed to prevent frozen pipes by ensuring cold air can’t enter a crawlspace. Closing vents during periods of heavy rain can also reduce humidity in a crawlspace.
Types of Foundation Vents
Here are the three main varieties of foundation vents.
Manual Foundation Vents
Manual foundation vents must be closed or opened manually. This type is typically found in crawlspaces. Check recommendations for your area to determine the best times to open or close your manual vents.
Automatic Foundation Vents
Automatic foundation vents are powered by electricity and will close and open automatically as needed to regulate the temperature and air flow in the space. Installing automatic vents means you don’t have to worry about when to open or close them. However, you should check them periodically to ensure they’re still operating normally, particularly after a power outage.
Powered Foundation Vents
Powered foundation vents include a low-speed fan that draws out excessive humidity, which can lead to mold and rot. Like automatic foundation vents, these should be inspected occasionally to ensure proper function.
Foundation Vent Materials
Foundation vents come in plastic, aluminum and steel. Materials vary in strength and aesthetics. Here’s a brief overview of the benefits of each to help you make the right decision.
Plastic
Plastic is an affordable option that may not have the longevity of other materials. However, if you’re looking for a specific hue to blend in with your home’s exterior, plastic comes in more color options.
Aluminum
Aluminum foundation vents are typically sturdier than plastic. They also stand up well against the elements.
Steel
Steel foundation vent covers are typically the sturdiest products. This material may be the best choice for withstanding the elements if you live in a harsh climate.
Foundation Vent Sizes
When choosing the correct foundation vent size for the installation, a proper fit should be your top priority. If the vent is too small, it won’t provide the right coverage and will leave gaps that can allow outdoor debris and pests to enter your home. If it’s too large, it won’t fit in the opening. When trying to determine the correct size, measure carefully and check the dimensions of the vents before purchasing. The manufacturer packaging may include exact measurements for compatible hole sizes.