GLASdek evaporative cooling and humidification media is a fire-rated, rigid cross-fluted pad manufactured by Munters and supplied by Premier Industries, Inc. It is designed for applications where cooling efficiency, durability, and strict fire code compliance must all be met at the same time. If you are sourcing GLASdek for an active project, contact Premier Industries early. Industry-wide lead times are currently running approximately 44 weeks on new orders, and Premier has been booking ahead to lock in pricing for upcoming installations. Reach out to our evaporative cooling specialists to check availability and get your order on the schedule.
GLASdek is one of several media options available through Premier Industries. If you are comparing media types or evaluating what fits your system, the evaporative cooling media hub covers the full lineup alongside selection guidance. For buyers still weighing whether evaporative cooling is the right solution for their facility, our breakdown of swamp cooler vs AC covers the differences in operating cost, efficiency, and climate fit.
What Makes GLASdek Different From Standard Evaporative Media
GLASdek is built from a flame retardant material fortified with rigidifying agents, which gives it structural integrity under continuous water saturation. The cross-fluted, unequal angle pad design creates highly turbulent mixing of air and water as airflow passes through, improving heat and moisture transfer beyond what a standard flat or symmetrical flute design can achieve.
The unequal flute geometry also serves a secondary function: it continuously directs more water toward the air-entering face of the pad, where evaporation intensity is highest. This keeps the most active zone of the media saturated and performing at its intended efficiency rather than drying out under high-velocity airflow.
Key performance characteristics
UL E900, Class II, required where fire codes restrict standard media
Cross-fluted unequal angle design maximizes heat and moisture transfer
Shallow flute angle sheds dust, sand, and debris without clogging
High face velocity with low pressure drop and minimal water carryover
GLASdek is the only evaporative media choice where strict adherence to fire codes is required. Its cross-fluted design delivers high evaporative efficiency with low pressure drop and minimal drift.
Custom Pad Cutting and Current Availability
Premier Industries can cut GLASdek pads to custom dimensions on demand. This capability is uncommon in the industry. Buyers who cannot find a supplier willing to cut to their exact specification have placed same-day orders with Premier specifically because of it. If your installation requires non-standard pad dimensions, this is worth a direct conversation.
What the current supply environment means for your project
GLASdek lead times have extended significantly across the industry, driven in large part by demand from data center cooling projects. New orders are currently running approximately 44 weeks out. Premier Industries has been proactively booking orders and locking in pricing for next year to protect customers from further delays and cost exposure.
If GLASdek is specified for your project, the time to act is before your installation window, not during it. Get in touch with our team to confirm current lead times, check whether cut-to-spec pads are needed, and get your project on the production schedule.
TUFedg Edge Treatment
Every GLASdek pad from Munters is protected with TUFedg, a proprietary edge treatment applied to the air-entering face of the pad. TUFedg is formulated to handle repeated cleaning cycles without damaging the pad structure, making it a meaningful durability improvement over untreated media.
What TUFedg does for pad longevity
- Nonporous and quick-drying: algae and minerals cannot anchor into the pad substrate, so they slough off when the pad dries rather than embedding into the media
- Protects the pad from the damaging effects of severe weather and long-term UV exposure
- Extends service life beyond that of non-treated pads in comparable conditions
- Survives repeated cleaning without surface breakdown or delamination
The combination of GLASdek’s self-cleaning flute geometry and TUFedg edge protection means the pad handles difficult operating conditions including high dust loads, mineral-heavy water, and outdoor exposure more reliably than standard media. For maintenance guidance on how these factors affect replacement timing, our overview of how often to replace swamp cooler pads covers the signs and intervals to watch for.
TUFedg is applied to the air-entering face of every GLASdek pad, preventing algae and mineral anchoring while protecting against UV and weather damage.
Design Specifications and Water Requirements
GLASdek installations require specific water distribution conditions to perform correctly. Undersupplying the pad reduces evaporation efficiency. Oversizing the sump or failing to account for bleedoff leads to mineral buildup and shortened pad life. The parameters below are the starting point for any GLASdek specification.
Water distribution requirements
- Flow rate: 1.5 gallons per minute per square foot of horizontal (top) pad surface area
- For installations with intense evaporation loads or pad walls taller than 72 inches, additional water flow may be required
- The gutter and sump must be sized to supply maximum flow rate without overflow when the system shuts down
Sizes available
| Dimension | Available Options | Notes |
|---|---|---|
| Depth | 4″, 6″, 8″, 12″ | Depth selection affects evaporative efficiency and static pressure |
| Height | 48″, 60″, 72″ | Taller pads may require increased water flow for even distribution |
| Width | 12″ | Standard width; custom cuts available on request |
| Custom cutting | Available on request | Premier Industries can cut pads to non-standard dimensions for specific installations |
Depth and height selection varies by application. If you need help sizing GLASdek for a specific installation, speak with our evaporative cooling team. Premier Industries can assist with sizing guidance and specification support. For system performance data, visit the graphs and specs page.
Maintenance and Mineral Management
GLASdek is designed to be serviceable in place. In most cases, routine maintenance can be performed while systems are still operating. The two primary maintenance concerns are mineral scaling and algae growth, both of which are manageable with consistent preventive practice.
Managing mineral deposits
Mineral buildup can be minimized by maintaining a continuous water bleedoff from the sump or by periodically dumping the sump entirely. The appropriate bleedoff rate depends on the pH and hardness of the local water supply. Munters can assist with individual bleedoff rate recommendations based on water quality data.
Controlling algae growth
If algae is allowed to grow unchecked on GLASdek, it can eventually clog the media passages and restrict airflow. This increases static pressure and reduces cooling efficiency. Algae growth responds well to early and consistent maintenance. Munters provides maintenance bulletins that outline recommended techniques for maximizing pad efficiency and service life. Refer to ASHRAE’s water quality guidelines for additional context on managing water treatment in evaporative cooling systems.
Distribution pads
Distribution pads are available as an accessory option. They disperse water laterally and evenly across the top of the GLASdek pad, improving saturation consistency. Distribution pads also carry Munters’ patented TUFedg edge treatment for the same durability benefits as the primary media.
GLASdek in the Context of Your Full Cooling System
GLASdek is a media product, not a standalone cooling solution. It performs within the context of the larger system it is installed in. That means the right pad depth, airflow design, water management, and equipment selection all affect how well GLASdek delivers. Premier Industries supports the full picture, from media selection through complete evaporative cooling equipment.
If you are evaluating GLASdek as part of a larger system purchase or replacement, you can compare the full range of evaporative coolers, review industrial evaporative coolers and commercial evaporative coolers for facility applications, or explore other media options including CELdek and KUUL Pads. For a broader view of replacement components and accessories, visit the products and accessories page. For buyers also thinking through the total cost of a cooling upgrade, our breakdown of evaporative cooler installation costs is worth reviewing before finalizing a budget.
Frequently Asked Questions About GLASdek
What is GLASdek and what is it used for?
GLASdek is a fire-rated rigid evaporative cooling and humidification media manufactured by Munters. It is used in evaporative cooling systems where high efficiency, fire code compliance, and durable long-term performance are required. It is particularly common in commercial, industrial, and data center cooling applications.
Why are GLASdek lead times so long right now?
Industry-wide demand for GLASdek has increased significantly, driven largely by large-scale data center cooling projects. New orders are currently running approximately 44 weeks out. Premier Industries has been booking ahead to lock in pricing and secure product for upcoming installations. If GLASdek is on your project spec, contacting Premier as early as possible is strongly recommended.
Can GLASdek pads be cut to custom dimensions?
Yes. Premier Industries can cut GLASdek pads to non-standard dimensions on demand. This capability is uncommon in the market and has resulted in same-day orders from buyers who could not source a cut-to-spec pad elsewhere. If your installation requires a custom size, contact Premier directly to discuss specifications and lead time.
What is TUFedg and why does it matter?
TUFedg is a proprietary edge treatment applied by Munters to the air-entering face of every GLASdek pad. It is nonporous and quick-drying, which prevents algae and minerals from anchoring into the pad substrate. They dry and slough off rather than embedding. TUFedg also protects against UV exposure and weather damage, extending the service life of the pad beyond untreated alternatives.
How often should GLASdek media be replaced?
When properly maintained, GLASdek pads can provide many years of efficient cooling and humidification performance. Replacement intervals depend on water quality, operating hours, and how consistently maintenance is performed. Our guide on how often to replace swamp cooler pads covers the signs that indicate media is due for replacement and what factors most affect the schedule.
What water flow rate does GLASdek require?
GLASdek requires 1.5 gallons per minute per square foot of horizontal (top) pad surface area. For installations with intense evaporation loads or pad walls taller than 72 inches, additional water flow may be needed. The gutter and sump should be sized to support maximum flow rate without overflow when the system shuts down.
Is evaporative cooling with GLASdek a cost-effective alternative to traditional AC?
In hot, dry climates evaporative cooling systems using high-efficiency media like GLASdek operate at a fraction of the energy cost of refrigerant-based air conditioning. The trade-off is reduced effectiveness in high-humidity environments. Our comparison of swamp cooler vs AC covers the cost, efficiency, and climate fit differences in detail.