What’s in your crawlspace?

All crawlspaces are not equal, but EVERY CRAWLSPACE will benefit from ATMOX.

The primary concern in most crawlspaces is generally moisture or water, but sometimes it’s hard to tell which is the cause and which is the effect. Significant water intrusion may need 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 crawlspace is the primary goal of ATMOX products. This is our niche and our expertise – ATMOX products have been part of moisture control solutions for crawlspaces for over 25 years.

ATMOX is adaptable to different crawlspaces that may vary by construction or climate. Explore more about the crawlspaces 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 actual drying or moisture control is done via fans and/or a dehumidifier. But 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 crawlspace.

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

The computerized ATMOX controller uses sensors to determine the best operation to improve conditions within your crawlspace. Proper and beneficial ventilation for moisture control occurs through a dew point comparison of inside and outside conditions. No other crawlspace moisture controller is looking 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 crawlspace to improve the conditions. Just like you intuitively know when the air feels good to open a window, the ATMOX controller knows which operation will use that “best” air by evaluating 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 crawlspace and your home.


Reducing moisture in the crawlspace 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 crawlspace 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 moisture control throughout your home.


Every ATMOX product is designed with an emphasis on energy efficiency. Moisture control should not be expensive to operate and should use as little energy consumption as possible. With the general setup of an ATMOX controller with fans and lights, only 100 watts of power is used – that is less than two old-fashioned light bulbs. 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 can be a very inefficient setup.


The air inside a house can be greatly affected by the crawlspace 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, and 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 crawlspace – it needs fresh outside air. There are many variations in homes and how much air from the crawlspace enters the living space, but no home is perfectly sealed. 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 to let you know about the crawlspace without the actual crawling. It is important to pay attention to the needs of your home, as conditions in and around your home are always changing. However, very few people eagerly want to spend time in their crawlspace. 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 CRAWLSPACE ATMOXsphere for your region.