Condensation & Moisture Control

360 Wall Exhaust and Intake Vents

Introducing a proven design that is so effective it can even eliminate condensation in a Conex / storage container.

Uses include: Crawl Spaces, Garden Sheds, Chemical Storage Enclosures, Attics, and Shipping Containers.



Container Moisture Control


  Frequently Asked Questions

Shipping Container / Conex Ventilation Systems

Eliminates Condensation, Extracts Fumes and Reduces Heat Build Up

Vent Options: The goal is to maximize the conditions of the container location, it’s size and how it’s positioned regarding wind direction, wind obstacles and sun / shade.  To allow for these variables we have products that fit the different walls. The “Wall Exhaust” pictured, can be installed on any of the 4 walls. Adapter plates will be required for the sides and rear.  Intake vents can also be installed on all 4 sides. You must order the correct adapter and intake to maximize the effectiveness of the winds in your particular area.

See “Vent Placement” for designing the optimum ventilation system.

"Wall Exhaust" the Ventilation Driver

  • Spend time on site to determine what end gets more wind.
  • Gusts, turbulence, unnoticeable winds and thermals will all drive the ventilation.
  • If the local wind is unpredictable with no one direction; or if the conex is often relocated, an Exhaust at each end might be required.  See “Low Winds and Air Exchange Tables.
  • Depending on the winds: 20 ft conex should do ok with 1 exhaust / 1 intake. 40 ft. 2 Exhaust /1 intake.  See above link to determine.
  • A door mount Exhaust will inhibit the doors from latching to the side walls.

Intake: Regardless how many of the small stock rectangular vents (See “Stock Vents and Comparisons”) are presently on the walls, a proper intake will be required at the opposite end of the Exhaust. This will allow air to pull throughout the entire container. One intake can feed 2 Exhaust vents. If possible mount the intake on the shady side. Side walls are a different profile than rear walls, note the screen shapes on the left.

Vent Quantity: A 40 foot container needs more ventilation than a 20 footer. The formula works on how many complete air exchanges / day. See “Low Winds and Air Exchange Tables.” If multiple Exhaust vents are required they should be on the same wall, with one profile spacing between.  Intake vents must be at the opposite end, or diagonal as below. The red end-zones in the diagram below are where vents should be located. Priority: Exhaust Vents need as much wind as possible.

Keeping a large metal box condensation free without power is not always that simple.  Some locations are tougher than others.  Please review “8 Steps to a Dry Container” and implement whatever is possible.

We want success for all our customers, so please review all the links listed above to ensure all the variables have been considered when designing your ventilation system.

Yes Sir!  The (Container Storage) Vents are just what the Dr. ordered!

I installed everything last Saturday. I took my first reading yesterday early evening. The outside temperature was 100 and RH was 67. Inside the container the temperature was 108 and the RH was 37. This morning the outside temperature is 74 and the RH is 97. Inside the container the temperature is 77 and the RH is 54.

Thank you!

John M, Texas

Note from 360 Products: On a 40' container, John used a wall exhaust vent on each of the 2 entry doors and a single back wall intake vent to achieve these results.

U.S. Navy

"I have no problem with you sharing our feedback, especially to fellow Naval personnel. [Y]ou'll be pleased to hear that my supervisor had a chance to see the finished product after the install I did, and he is very pleased that not only the obvious functionality of the vent (feeling the breeze, he said), but also the aesthetic look the[y] add. We are definitely satisfied with your product and would recommend it to anyone in need of such a thing."

~V. Moreno, U.S. Navy

U.S. Navy - 6 Week Follow-Up!

"The vents are doing a fantastic job and seems to be mitigating any form of moisture intrusion inside the Conex. All in all you have much to be proud about with this outstanding product and we would be happy to recommend it to anyone."

~V. Moreno, U.S. Navy

Vent Installations

Specifications & Resources

There are many variables and every geographical location is different.  There is no one perfect resolution.  This makes it even more important to read the material provided on this site and see what combination best fits your own situation.  Please do not hesitate to call us if you have any questions.  That's why we publish our personal contact information and do not use call centers.

Contact Us:

Technical Inquiries:

(604) 715-6072 PST

Email: Ron Parry

Other Inquiries:

(503) 718-1585 PST

Email: Bob Cravens

(812) 798-0787 EST

Email: Greg Cravens