--- title: What Designers Need to Know About Viking’s Exciting 2025 Oxeo Testing Results description: Discover Viking's groundbreaking 2025 Oxeo testing results, revealing new design insights for inert gas fire suppression systems in imperfect enclosures. image: https://blog.vikinggroupinc.com/hubfs/Banner%20Graphics%20and%20Featured%20Images/Blog_Featured-Image-Template_Oxeo_Feb_2026.png --- [Skip to content](https://blog.vikinggroupinc.com/2025-oxeo-testing-results#main-content) [![Viking Logo](https://blog.vikinggroupinc.com/hs-fs/hubfs/Viking%20PMS287%2072dpi-2.png?width=211&height=50&name=Viking%20PMS287%2072dpi-2.png)](https://www.vikinggroupinc.com) Open main navigation Close main navigation ## Trusted above all.™ Feb 9, 2026, 10:46:53 AM # What Designers Need to Know About Viking’s Exciting 2025 Oxeo Testing Results [Zoe' Hills](https://blog.vikinggroupinc.com/author/zoe-hills) Share: [facebook-f icon](http://www.facebook.com/share.php?u=https://blog.vikinggroupinc.com/2025-oxeo-testing-results) [linkedin-in icon](http://www.linkedin.com/shareArticle?mini=true&url=https://blog.vikinggroupinc.com/2025-oxeo-testing-results) [Twitter icon](https://twitter.com/intent/tweet?url=https://blog.vikinggroupinc.com/2025-oxeo-testing-results) [pinterest-p icon](http://pinterest.com/pin/create/link/?url=https://blog.vikinggroupinc.com/2025-oxeo-testing-results) [envelope icon](mailto:?body=https://blog.vikinggroupinc.com/2025-oxeo-testing-results) Over the past year, Viking has conducted extensive testing of FM Approved and UL Listed [Oxeo inert gas fire extinguishing systems](https://www.vikinggroupinc.com/products/special-hazards/oxeo) to push industry understanding of clean-agent performance in challenging real-world scenarios. We’re excited to share results that open new doors for designers and engineers approaching Class B fuel hazards and rooms with unclosable openings when using nitrogen. ## Why This Testing Matters![Landing-Page_Oxeo-1](https://blog.vikinggroupinc.com/hs-fs/hubfs/Mockups%20and%20Renderings/Landing-Page_Oxeo-1.png?width=501&height=501&name=Landing-Page_Oxeo-1.png) Clean agent fire suppression systems are widely specified for **Class B hazards** (flammable liquids, fuels, etc.) because they protect both people and sensitive equipment without leaving residue. However, real facilities often have conditions that fall outside traditional design assumptions, like **unclosable openings** such as voids, vents, corridors, or permanent penetrations that cannot be sealed. Historically, these openings have required additional agents to ensure the system can achieve and hold design concentration long enough to extinguish a fire. ## The Goal The goal of our testing was to determine if additional nitrogen was required to maintain 85% of the design concentration for the required 10-minute hold time. ## What We Tested To evaluate whether nitrogen-based Oxeo systems can maintain their target design concentrations in rooms with unclosable openings, Viking conducted a series of controlled tests with multiple variables. **Elevation** The first round of testing took place in **Caledonia, Michiga****n** (approximately 810 ft. \[247 m\] above sea level), followed by a second round in **Aurora, Colorado** (approximately 6,229 ft. \[1,899 m\] above sea level). Testing at these locations allowed us to assess system performance across a broad range of geographic conditions and elevations. **Unclosable Opening Location** Multiple test configurations were evaluated at each location. While the room dimensions remained consistent throughout the testing, the location of the unclosable opening varied between setups. In **Setup A**, the lower vent was open, while in **Setup B**, the upper vent was open. The vents were approximately 5 sq. ft. in area. **Concentration Target** For each elevation and setup location, there were also **30%** and **50%** concentration targets being tested. ![](https://blog.vikinggroupinc.com/hs-fs/hubfs/undefined.png?width=936&height=736&name=undefined.png) ## The Result The testing found that regardless of the Oxeo system’s geographic location, no additional nitrogen was needed for design concentrations up to 50% in a room with 0.5% openings of total enclosed boundaries (including walls and floors). ## What This Means for Designers Thanks to these validated findings: - Additional agents are no longer required for rooms with small (≤0.5%) unclosable openings. - Engineers now have quantifiable, tested design guidance when specifying inert gas systems in “imperfect” enclosures. - Systems can be more cost-effective and space-efficient without compromising fire protection objectives. ## Final Thoughts The 2025 Oxeo testing effort represents a major step forward in understanding how inert gas systems perform in real­ world, imperfect enclosure conditions. With proven nitrogen performance up to 0.5% in areas with unclosable openings, designers and engineers can specify Oxeo systems with more confidence and greater flexibility. That’s why robust fire protection solutions from Viking are trusted above all. If you’d like more details on Oxeo and its testing, please see the resources below. [![Oxeo Testing Bulletins](https://no-cache.hubspot.com/cta/default/20543845/ccca4172-0607-4363-8f34-4582df6d3049.png)](https://cta-redirect.hubspot.com/cta/redirect/20543845/ccca4172-0607-4363-8f34-4582df6d3049)              [![Shop Now](https://no-cache.hubspot.com/cta/default/20543845/28badd50-5c28-451b-8c92-2fa536b4228c.png)](https://cta-redirect.hubspot.com/cta/redirect/20543845/28badd50-5c28-451b-8c92-2fa536b4228c)              [![View Product Page](https://no-cache.hubspot.com/cta/default/20543845/45036503-5481-4e3a-905f-35da85fbc205.png)](https://cta-redirect.hubspot.com/cta/redirect/20543845/45036503-5481-4e3a-905f-35da85fbc205)   [Product Innovations](https://blog.vikinggroupinc.com/tag/product-innovations), [Oxeo Extinguishing System](https://blog.vikinggroupinc.com/tag/oxeo-extinguishing-system), [Oxeo](https://blog.vikinggroupinc.com/tag/oxeo) ## Related posts [![](https://blog.vikinggroupinc.com/hs-fs/hubfs/Blog_Featured-Image-TotalPac-01.png?height=200&name=Blog_Featured-Image-TotalPac-01.png)](https://blog.vikinggroupinc.com/totalpac) [Product Innovations](https://blog.vikinggroupinc.com/tag/product-innovations), [Business Partners](https://blog.vikinggroupinc.com/tag/business-partners), [Product and News](https://blog.vikinggroupinc.com/tag/product-and-news) ## [How Viking and FireFlex Revolutionized Preaction Fire Protection](https://blog.vikinggroupinc.com/totalpac) ![Picture of Jim Dooley](https://blog.vikinggroupinc.com/hs-fs/hubfs/Social%20and%20Videos/Jim%20Dooley.jpg?width=50&name=Jim%20Dooley.jpg) [Jim Dooley](https://blog.vikinggroupinc.com/author/jim-dooley) Jun 2, 2025, 10:19:27 AM Prior to 1994, preaction fire protection systems were typically assembled at the construction site.... [Read more](https://blog.vikinggroupinc.com/totalpac) [![](https://blog.vikinggroupinc.com/hs-fs/hubfs/Banner%20Graphics%20and%20Featured%20Images/Blog_Featured-Image-Template_TechTalks-01.png?height=200&name=Blog_Featured-Image-Template_TechTalks-01.png)](https://blog.vikinggroupinc.com/vikings-techtalks-series-returns-for-season-3) [Product Innovations](https://blog.vikinggroupinc.com/tag/product-innovations), [Technical Experts](https://blog.vikinggroupinc.com/tag/technical-experts) ## [Viking's TechTalks Series Returns for Season 3](https://blog.vikinggroupinc.com/vikings-techtalks-series-returns-for-season-3) ![Picture of Nancy Houghton](https://blog.vikinggroupinc.com/hs-fs/hubfs/9b9960a7-be07-43b1-92ac-195c8dd6a787-1.jpeg?width=50&name=9b9960a7-be07-43b1-92ac-195c8dd6a787-1.jpeg) [Nancy Houghton](https://blog.vikinggroupinc.com/author/nancy-houghton) Mar 5, 2024, 9:00:00 AM Viking’s TechTalks video podcast series is back for a third season, covering technical fire... [Read more](https://blog.vikinggroupinc.com/vikings-techtalks-series-returns-for-season-3) [![Hands-On Fire Protection Training and Learning Programs](https://blog.vikinggroupinc.com/hs-fs/hubfs/IMG-1538-web.png?height=200&name=IMG-1538-web.png)](https://blog.vikinggroupinc.com/new-viking-learning-programs-in-2023) [Viking Training](https://blog.vikinggroupinc.com/tag/viking-training), [Fire Protection Training](https://blog.vikinggroupinc.com/tag/fire-protection-training) ## [New Viking Fire Protection Training and Learning Programs in 2023](https://blog.vikinggroupinc.com/new-viking-learning-programs-in-2023) ![Picture of James Lake](https://blog.vikinggroupinc.com/hs-fs/hubfs/Jim%20Lake.jpg?width=50&name=Jim%20Lake.jpg) [James Lake](https://blog.vikinggroupinc.com/author/james-lake) Feb 2, 2023, 3:34:55 PM 2022 was a banner year for Viking learning programs. We hosted over 60 learning events and customer... 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