EVAPORATIVE MEDIA
Cooling and humidification media — stocked, cut to size, and shipped nationwide.
Lead time 16 weeks
Lead time 8 weeks
Lead time 2 weeks
Technical Documents & Resources
Spec sheets, performance data, and submittal documentation. If something you need isn’t here, request it below and we’ll send it directly.
| GLASdek® — Glass Fiber Media | |
| GLASdek® GX30 | Product Sheet → |
| GLASdek® GX35 | Product Sheet → |
| GLASdek® GX40 | Product Sheet → |
| CELdek® — Cellulose Media | |
| CELdek® evaporative media | Product Sheet → |
| Eliminators & Tower Fill | |
| Drift and mist eliminators | Coming soon |
| Cooling tower fill (PVC) | Coming soon |
Replacement Guidelines
How to identify what’s currently in your equipment and order the correct replacement. Most replacement orders come down to three things: media type, cassette dimensions, and depth. If you’re unsure of any of them, send us a photo and the equipment model — we can usually identify it from that.
How to Measure Your Existing Media
Step-by-step on measuring cassette height, width, and depth so the replacement drops straight in without modifying the equipment.
Media Identification Guide
How to tell cellulose from glass fiber, read manufacturer markings, and identify flute configuration from the media face.
Removal & Installation Instructions
Pulling old media without damaging the cassette or distribution header, and seating new media so water distributes evenly across the full face.
Standard Stock Sizes Reference
Common cassette dimensions and depths held in stock, and what ships same day versus what needs a custom cut.
Understanding Evaporative Media
What it is, how the process works, and how to tell when yours needs replacing.
Evaporative media is a rigid, corrugated pad that sits directly in the airstream. Water flows down through it while air passes across it, and the water that evaporates carries heat out of the air.
There’s no compressor and no refrigerant — just a physical exchange that costs a fraction of the energy mechanical cooling does. That’s why evaporative systems show up wherever high heat loads meet dry air: data centers, greenhouses, industrial process spaces, and large ventilation applications.
The media itself is what makes that exchange efficient. Its flute geometry determines how thoroughly air and water mix. Its depth determines how close the air gets to saturation. Its material determines how long it survives your water. And it’s the only part of the system that wears out — everything else is pumps, fans, and housing.
Four things your media choice determines:
- How much cooling you get — saturation efficiency, driven by depth and flute design
- How much fan energy it costs — pressure drop across the media bank
- How often you replace it — material and water chemistry together
- Whether it meets code — substrate and fire performance
Four steps, one continuous process. The whole exchange happens in the few inches of depth the air takes to cross the media.
Air enters the media
Warm, dry air is drawn into the system and directed across the face of the media bank.
Water wets the surface
Water is distributed across the top and flows down, saturating every flute in the pad.
Evaporation absorbs heat
As air moves through the wetted flutes, water evaporates and pulls heat directly out of the airstream.
Cooler air leaves
Cooler, more humid air exits the media and moves on to the space, the coil, or the process.
The key variable is how dry your air is. Evaporative cooling works off wet bulb depression — the gap between dry bulb and wet bulb temperature. The drier the incoming air, the more cooling you get. That’s why identical media performs very differently in Phoenix than in Atlanta, and why design conditions drive media selection.
Media doesn’t fail all at once — it degrades gradually, and the efficiency loss usually shows up on your energy bill before anyone notices a problem with the equipment. These are the signs worth catching early.
Cooling performance has dropped
Supply air temperatures are creeping up, or the system no longer holds setpoint on design days. A widening approach to wet bulb is the clearest early signal.
Visible scale or mineral buildup
White crusty deposits, a hardened surface, or flutes closing up with mineral. Scale reduces cooling and raises static pressure at the same time.
Static pressure is climbing
Fans working harder, VFDs running higher than they used to, or measured airflow falling off. Restricted media costs you fan energy every hour it runs.
Sagging or soft media
Pads slumping in the cassette, soft spots, crumbling edges, or loss of rigidity when wet. Once media loses its shape it stops directing air and water correctly.
Dry streaks and uneven wetting
Visible dry channels across the face mean water is no longer distributing evenly. Any dry area is contributing airflow without contributing cooling.
Algae, odor, or discoloration
Biological growth, slime, or a musty smell carrying into supply air. Growth blocks flutes and signals that water treatment needs attention too.
Age alone isn’t the whole story. Water chemistry drives service life more than the calendar does. The same media can last years in treated water and fail in a single season in hard or untreated water. If you’re not sure where yours stands, send us a photo of the media face and your equipment model — we can usually tell you what you’re looking at.
