evaporative cooling pad, made of corrugated cellulose materials with honeycomb-like structure, is used in evaporative air cooling

pad cooling evaporative honeycomb swamp cooler pads desert corrugated cellulose structure background pattern abstract texture water paper isolated air moistening materials evaporation art space white retro box grunge color window factory old yellow media climate fiber system commercial residential industrial material hvac beige copy brown conditioning cool honeycomblike used systems isolate