Industrial cooling that cuts energy costs by up to 80%
MegEvap designs and manufactures stainless steel evaporative cooling equipment for the toughest industrial environments — from roll-around portables to complete air handling systems, up to 20,000 CFM and beyond.
Cooling as simple as physics
No compressors. No refrigerant. Water evaporates, heat disappears — the same reason a breeze off a lake feels cool.
Example shown: a dry 95°F day. Click a step to see what's happening inside ↓
1. Hot air is pulled in
A fan draws hot, dry outside air into the cooler.
2. Water soaks up the heat
The air passes through water-soaked media. Evaporation pulls the heat out — and traps dust on the way through.
3. Cool, clean air comes out
Up to 35°F cooler, filtered, and constantly fresh — for a fraction of the power AC burns.
Moving serious air
Industrial cooling is measured in CFM — cubic feet of air per minute. Our portables move 6,000 to 20,000 CFM, and stationary systems go bigger. Because the air is constantly replaced rather than recirculated, the space stays ventilated and positive-pressured: hot, dusty air gets pushed out instead of stirred around. High-efficiency fans and blowers mean nearly all the electricity goes into moving air, not making cold.
Where the heat actually goes
Turning liquid water into vapor absorbs nearly 1,000 BTU per pound of water — and that heat comes straight out of the airstream. The drier the climate, the more water the air can absorb and the bigger the drop, which is why evaporative cooling shines across the Mountain West. The 12″ rigid media also acts like flypaper for dust, smoke, and pollen, and its self-cleaning water flow flushes what it catches to the sump.
Cooler, cleaner, cheaper
The delivered air is up to 35°F cooler, filtered, and 100% fresh. And the economics are lopsided: air conditioning makes cold by compressing refrigerant with big motors, while evaporation gets it free from physics — the only power you pay for is a fan and a small pump. In ventilation applications that's up to 80% lower operating cost. See the full energy math →
See it work in your climate
Evaporative performance depends on two things: how hot and how dry your air is. Drag the sliders and watch what a MegEvap unit could deliver, estimated with standard psychrometric math.
Hot and dry? That's where we shine. Even at higher humidity, you still get ventilation, filtration, and pre-cooling benefits.
Hold on — “psychrometric”?
It sounds technical, but the idea is simple: how much water can this air drink, and how much does it cool off doing it? Hot, dry air is thirsty air. Feed it water and it takes the heat with it.
Engineers plot this on a psychrometric chart, which looks like a subway map designed by someone having a rough day. The sliders above run the same math — you just get to skip the chart.
Your conditions
Estimate only — leaving-air temperature through 12″ rigid media at ~90% evaporative efficiency, capped at our rated 35°F maximum drop. Actual performance varies by unit and conditions; we'll quote real numbers for your application.
Cooling equipment engineered for industry
Since 1983 we've built cooling for mines, mills, factories, farms, and racetracks — all stainless steel, all built to run for decades. Six product families cover nearly any application.
Portable Coolers
Roll it where the heat is. Models from 6,000 to 20,000 CFM — including the highest-capacity portable evaporative cooler on the market.
See models →Stationary Systems
RTA series coolers from 9,000 CFM, retro-fit wet sections, and packaged units — add cooling to the ventilation system you already own.
See systems →Condenser Pre-Coolers
Drop condenser intake air temperature, lower head pressure, and let your compressors work less for the same tonnage.
Learn more →Specialty Coolers
When off-the-shelf won't cut it: custom-engineered units for unique applications, from high-pressure coolers to micro-turbine pre-coolers.
Learn more →Pure Vapor Humidifiers
True vapor humidification — no droplets, no fog, no steam heat load. Ideal for winery barrel rooms, produce, and process environments.
Learn more →Replacement Media
Munters CELdek® rigid evaporative media in standard and cut-to-order sizes — self-cleaning, scrubbable, and built to last.
Sizes & ordering →Same air. Same 22.5° drop. 150× less power.
Dropping 10,000 CFM from 90°F to 67.5°F takes about 25 compressor horsepower. A MegEvap wet section does it on one-sixth of one — a fan and a small pump.
That's the cooling alone; across a full system it's up to 80% off operating cost. Which is why evaporative cooling keeps winning in warehouses, shops, and agricultural facilities — spaces long written off as too expensive to cool.
See the Numbers- Up to 80% lower operating cost than refrigerated air conditioning in ventilation applications.
- Cleaner air out than in — wet media traps dust, smoke, pollen, and spores, and reduces water-soluble VOCs.
- Fresh air, not recirculated air — constant positive ventilation instead of a sealed refrigerated loop.
- Simple to maintain — no compressors, no refrigerant, no CFC risk.
Tell us what you need to cool
Talk directly with the people who design and build the equipment. We'll size a unit for your application — or engineer one that doesn't exist yet.