Summary

As AI-driven power demands increase, data center operators face growing pressure to improve sustainability. This article explores how Subzero Engineering's DAB Panels help address the challenge of maintaining effective airflow containment while meeting fire-safety requirements.

It also examines how properly sealed containment can reduce energy waste and why facilities and sustainability teams should work together to identify and report the environmental benefits of existing infrastructure.

As AI-driven power and cooling demand puts data center operators under growing environmental scrutiny, this article argues one of the more concrete sustainability wins available to them is going almost entirely untold: the material used to seal or enclose containment systems.

The carbon case is where the disconnect becomes clearest. Sealing containment properly carries real, quantifiable emissions savings at around 333 kg of carbon credit potential over five years per 100,000 sq ft, and this scales significantly across large portfolios. Yet major operators already running facilities sealed with this material have never connected that fact to their sustainability reporting. The savings are happening; they’re just not being counted.

Often decisions that are made by facilities and procurement are made independently to sustainability mandates, even though they may ultimately affect environmental results. While compliance drives adoption in strict-enforcement markets, it might be that it’s the sustainability messaging that has the stronger lead in more environmentally focused ones. 

The material behind Subzero Engineering’s DAB (Dissolvable Air Barrier) panels is a certified, already-installed material with a real environmental impact. We ask, why is nobody reporting it?

Article

Unlocking the Green Story Behind Containment

The growth of AI-driven power and cooling demands is putting data center operators under much harsher scrutiny when it comes to environmental impact. Sustainability mandates mean more questions are being asked of operators’ carbon footprints, PUE gradings, and long-term net-zero commitments. While ambitious green roadmaps, solar power purchase agreements, and liquid cooling systems all check the carbon-reduction box, one of the simplest sustainability wins is already happening in many data halls. Yet the material used to seal and fully enclose either horizontal or vertical containment, a product already installed and doing its job, barely gets mentioned.

A Sealed Story, Left Untold

Hot aisle and cold aisle containment is standard practice in modern data centers. The containment roof panel for cold aisle containment and vertical panel for hot aisle containment, and the material used, is often treated as a minor detail within a much larger cooling strategy.

There is often one detail that goes unaddressed: openings above the cold aisle containment due to a lack of roof system, and openings above the hot aisle due to containment not going up to the plenum ceiling, and it’s been driving up cooling costs since the day the facility opened.

It’s not an oversight or a design flaw. It’s a direct byproduct of adhering to fire code. Sprinkler heads are engineered for the widest possible dispersal pattern to maximize coverage in a fire event and fully sealing or enclosing the top of the cold aisle with a roof system or with vertical panels above the hot aisle and up to the plenum ceiling can take the facility out of compliance with the fire code.

That leaves facility operators with two options:

• To leave the roof system off of cold aisle containment or to leave at least 24” of containment off the top of the vertical hot aisle containment up to the plenum ceiling, preserving the sprinkler’s coverage pattern at the cost of a fully sealed containment system; or
• Install sprinkler heads in every single aisle, which solves the dispersal problem but comes with a catch — a layout that made sense at commissioning rarely stays fixed for the life of the facility, and a sprinkler system built around a specific aisle plan doesn’t adapt easily when that plan changes.

Most facilities take the first option. It’s simpler, cheaper, and satisfies fire code, but it also means that either the cold or hot aisle containment system is not fully sealed and contained, allowing the hot air to rise, drift across the gap, and mix back into the cold aisle. This design undoes some of the benefits that the containment system just performed, and the HVAC system compensates by working even harder.

This is a constant, low-grade condition and rarely gets flagged as an issue. Instead, it shows up as elevated energy costs and lower cooling efficiency, spread across the operational life of the facility in a way that’s easy to normalize and tough to trace back to its origin.

However, closing the openings outright isn’t as simple as adding a horizontal roof or vertical panels for the physical containment seal. Doing that just reintroduces the original problem of fire code compliance. If the suppression system can’t detect a fire fast enough because the containment is fully sealed, it becomes a real hazard.

Why DAB Panels Are the Overlooked Asset

DAB panels solve a problem that has limited containment for years. Traditional roof panels can obstruct sprinkler coverage, force relocation of sprinkler heads, or get rejected outright by the local Authority Having Jurisdiction (AHJ). DAB panels are currently the only approved product that seals the horizontal gap over the cold aisle without triggering those concerns. The same is true with hot aisle vertical panels up to the plenum ceiling.

DAB panels that are made from an EPA-certified, plant-based cellulose composite provide a continuous seal across the top of a contained aisle. Cooling equipment runs closer to design conditions instead of continuously compensating for leaked airflow, and panels can be easily cut, configured and fitted on-site around cable trays, pipes, and other overhead obstructions, ideal for both new builds and retrofits.

Paired with a purpose-built passive airflow flap, a small mechanism fitted with a melting fuse plug, DAB panels keep the containment seal closed and intact under normal operating conditions, letting the HVAC system run at full efficiency. If a fire starts and aisle temperature rises, the fuse plugs melt, the flap opens, and hot air is immediately released upward for cold aisle containment and outward for hot aisle containment to the sprinkler activation system. The sprinklers dissolve the DAB panels within 30 seconds, removing the risk of any falling-object hazard that might restrict egress, so response time stays fast and AHJs stay satisfied.

This is a design that fire protection engineers have reviewed and signed off on directly. A fully sealed cold or hot aisle, paired with airflow flaps where needed, meets fire code requirements without compromising fire suppression response times.

Why the Disconnect Exists

DAB panels are being adopted because they solve a fire-safety-versus-efficiency conflict that had nothing to do with ESG reporting. They weren’t adopted because someone was chasing a carbon number. That’s why the sustainability benefit has gone unclaimed. It’s a side effect of a sound engineering decision.

Containment sealing is typically a facilities and procurement decision, evaluated on cooling performance, installation cost, and code compliance, not on its contribution to a corporate carbon disclosure. Sustainability teams are rarely able to voice an opinion on the mechanical and construction details of a build-out. Therefore, two functions inside the same organization end up shaping the same environmental outcome but have no shared line of sight between them.

What’s missing is the connectivity between the facilities team that specified the panels and the sustainability team that reports on emissions.

Closing the Gap

Properly sealed containment delivers real emissions savings: roughly 333 kg of carbon credit potential over five years for every 100,000 square feet sealed. Applied across a hyperscale portfolio spanning millions of square feet, it becomes a line-item that’s worth reporting. But if operators running facilities sealed with DAB panels haven’t linked that fact to their sustainability reports, then the savings are happening but aren’t captured or publicized on carbon credit calculations or customer-facing disclosures.

For an industry under constant pressure to justify progress on net-zero programs, operators are leaving value unclaimed. The material is installed, the certification exists, and the savings are accruing.

Unlocking the potential doesn’t require new capital or a change in engineering standards. It requires operators to:

• Audit existing containment installations to identify where certified sealing materials are already in place.
• Quantify the carbon credit potential across the full portfolio, not just per site.
• Build a reporting bridge between procurement/facilities and sustainability teams, so decisions made for performance reasons are also captured for disclosure.
• Lead with the business case, not just the compliance case, in markets where sustainability credentials are a competitive differentiator.

The carbon case for fully sealed containment may be the most quantifiable sustainability win sitting inside a data center today, precisely because it’s already been made. The panels are up, and the seals are in place. The only thing left to do is claim its value.