What’s in your crawl space?

All crawl spaces are not equal, but EVERY CRAWL SPACE will benefit from ATMOX.

The primary concern in most crawl spaces is generally moisture or water, but sometimes it’s hard to tell which is the cause and which is the effect. Significant water intrusion needs to be addressed through proper drainage or waterproofing. However, where there is water, there will be moisture in the air. At the same time, when there is too much moisture in the air, it can lead to condensation or water. It’s this condensation that leads to the issues of mold, fungus, pests and wood rot – all the things that you want to avoid in your home.

Solving moisture in the crawl space is the primary goal of ATMOX products. This is our niche and our expertise – ATMOX products have been part of moisture control solutions for crawl spaces for over 25 years.

ATMOX is adaptable to different crawl spaces that may vary by construction or climate. Explore more about the crawl spaces in your geographic region at the bottom of the page.

Learn more about your geographic region. Select at the bottom of the page.

How the ATMOXsphere comes together.

With an ATMOX controller, the fans and/or dehumidifier do the actual drying or moisture control. However, the ATMOX setup is not just fans and/or a dehumidifier. It’s a smart solution using decades of observation and science to bring the best all-encompassing system to your crawl space.

Use a common sense approach to always put the “best” air in your crawl space. Let the scientific data determine the “best”.

The computerized ATMOX controller uses sensors to determine the best operation to improve conditions within your crawl space. Proper and beneficial ventilation for moisture control occurs through a dew point comparison of inside and outside conditions. No other crawl space moisture controller looks at the combinations of dew point, temperature, and humidity to determine operation. A single humidity reading can often be misleading as temperature is an important part of understanding relative humidity. Most standalone fans and dehumidifiers don’t have the sophistication to truly measure moisture without ATMOX.

It’s really a very simple and common sense approach. Use the “best” air in your crawl space to improve the conditions. You intuitively know when the air feels good to open a window. Similarly, the ATMOX controller knows which operation will use that “best” air. The controller evaluates the temperature, dew point and humidity information received from sensors. It will automatically determine if it should ventilate with outside air, circulate inside air, or use a dehumidifier.

Let’s look at the factors that are important to your crawl space and your home.


Reducing moisture in the crawl space is the primary focus. It is well-known that moisture can lead to so many major issues for your home. Moisture must be addressed before the potential damage from wood rot, mold or fungal growth occurs. There are many contributing factors to crawl space issues: ground moisture, trapped air, low clearance, decks, porches and water intrusion. Since these issues happen over time and generally not from a one-time event, they are usually not covered by insurance and will be the homeowner’s responsibility. Be proactive on crawl space moisture control and throughout your home.


Every ATMOX product emphasizes energy efficiency. Moisture control should not be expensive to operate and should use as little energy consumption as possible. With the general setup, an ATMOX controller with fans and lights use only 100 watts of power – that is less than two old-fashioned light bulbs. On the other hand, a dehumidifier can use significantly more electricity when operating. An ATMOX setup with dehumidifier generally minimizes operation of the dehumidifier to peak summer months for operational efficiency. Using a dehumidifier without fans for moisture control is a very inefficient setup.


The air inside a house can be greatly affected by the crawl space due to the stack effect that pulls air up through the house. The quality of the air can only be improved by exchanging it with fresh outside air.

Construction-related studies are starting to pay more attention to Indoor air quality. As home construction focuses on building for energy efficiency and weatherization, buildings have gotten tighter leading to few air exchanges. Therefore, pollutants within homes are building up. According to the EPA, indoor levels of air pollutants can be two to five times higher than outdoor levels. In order to be healthier, indoor air needs to be exchanged with fresh air.

The same is true in a crawl space – it needs fresh outside air. There are many variations in homes and how much air from the crawl space enters the living space, but no home is perfectly sealed. For example, one of the most common complaints of any sealed or closed-up space is the odor. The odor is very simply an indicator of stagnant air. Even dry air can have musty smells when it isn’t moving or exchanged. Solution is simple – introduce fresh air to a space at the right times.


The ATMOX display gives you piece of mind with status information and alerts. It lets you know about the crawl space and potential moisture concerns without the actual crawling. It is important to pay attention to the needs of your home. The conditions in and around your home are always changing. However, very few people eagerly want to spend time in their crawl space. For this reason, getting an annual inspection of your home is always a good idea, but you should also know what is going on the remainder of the year.

Learn more about the CRAWL SPACE ATMOXsphere for your region.

Learn more about the ATMOX Products.

Full solution for crawl space moisture comes together with controls, sensors, fans and/or dehumidifier.

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