Home > Dehumidifiers > Where to Place Dehumidifier in Crawl Space?

Where to Place Dehumidifier in Crawl Space?

If you’re like most homeowners, you probably don’t think about your crawl space until there’s a problem. If you do have a dehumidifier in your crawl space, it’s probably not in the right spot.

Where to place your dehumidifier in crawl space for the best results

The answer may surprise you. Most people believe that the best place to install a dehumidifier is in the center of the crawl space. However, this is not always the case.

If your crawl space is large. It will be more difficult to maintain as you might have to change the filter more often.

You could place it closer to a foundation wall so the intake side is facing the wall and the dry air is blowing into the largest part of the crawl space. Make sure is it not to close to a foundation wall.

There are a few factors that you need to take into account when deciding where to place your dehumidifier.

So depending on a variety of factors, including the size and shape, airflow, humidity level, temperature, crawl space, existing electrical outlet, the climate in which your home is located, and the amount of moisture in the air.

Here are a few tips to place your dehumidifier in a crawl space

A dehumidifier is a great way to keep your crawl space dry and free of mold. But where should you put it? Here are a few tips:

Not close to the door

You might be tempted to place the dehumidifier near the door so you can easily get it in and out of the crawl space. However, this is not a good idea. If it is, the humid air from outside could quickly offset any progress the dehumidifier is making.

The reason is that the crawl space door will likely be open and closed frequently, and every time it’s opened, humid outside air will enter the crawl space.

And you shouldn’t place it close to the door because a lot of doors, even when you try to air seal them, will leak. It’s still going to leak in a lot of air from the outside.

Raise it up off the ground

For starters, make sure that the dehumidifier is placed on a level surface. You can use cinder blocks. Or you can hang your dehumidifier, it depend on your unit.

Second, consider putting it on a platform or shelf to raise it up off the ground. This will help prevent any moisture from the ground from reaching the unit.

Find source of humidity

Try to locate the source of the humidity in the crawl space and position the dehumidifier accordingly or fix leaks. This will help it work more efficiently.

For example, if the source of the humidity is a vent, then you want to position the dehumidifier so that it’s blowing air across the vent.

If you can’t find the source of the humidity, then just position the dehumidifier in the center of the crawl space.

Size of dehumidifier matters

Make sure you get a dehumidifier that’s properly sized for your crawl space. If it’s too small, it won’t be able to effectively remove the moisture from the air.


The fourth and final factor to consider is the temperature in your crawl space. If the temperature is cold, then placing the dehumidifier near a heat source may be the best option. However, if the temperature is warm, then you may want to consider placing the dehumidifier in the center of the space.

Don’t Block airflow in/out of a dehumidifier

The unit needs to be able to take in air from the space and exhaust humid air outside.

it’s important to make sure that airflow is not blocked in or out of the unit. If airflow is restricted, the dehumidifier will have to work harder to remove moisture from the air, which can put a strain on the unit and shorten its lifespan.

In addition, blocking airflow can cause the unit to freeze up, which can lead to leaks and water damage. To avoid these problems, Make sure that there are at least a few inches of clearance around the dehumidifier, not put the unit too close to a wall and drapes from blocking the vents. By taking these simple precautions, you can help ensure that your dehumidifier runs efficiently for years to come.

Draining the drain line outside the crawl space

When choosing a location for the unit, make sure to position it near a floor drain or other outlet so that the water can be properly removed from the area. With a little effort, you can keep your crawl space dry and free of musty odors.

In addition, it’s important to empty the water collection tank regularly. If the tank gets too full, it can cause the dehumidifier to stop working effectively. So always buy a built-in pump dehumidifier for your crawl space.