Replacement aspen swamp cooler pads for stand-alone evaporative coolers will keep your greenhouse or warehouse from buckling under the summer heat. Aspen pads offer the best cooling capacity and water absorption but eventually wear out. Depending on water quality, frequency of use and environmental conditions, swamp cooler aspen pads generally should be replaced every three to four years, though some commercial growers will need to change them more often. These OEM evaporative cooler pads are easy to install so the system will quickly be humming again. Greenhouse Megastore has eight different swamp cooler padding kits for our ducted and thru-wall evaporative cooler models. See the chart below for which aspen pad set goes with which swamp coolers. Order them for scheduled maintenance or keep a backup set on hand in case of emergencies. If you don't see your model listed or have questions about installation, call us at 888-281-9337. We're here to help with the right swamp cooler filters for better performance. Replacement Aspen Pads for Evaporative Coolers Pad Size # of Pads Fits Thru Wall Models Fits Ducted Models 21" x 20-1/2" 3 EV-BW 3000 CFM 21" x 24-1/2" 4 EV-BW 3500 CFM EV-HM 3300 CFM 28" x 29" 4 EV-BW 4500 CFM, EV-BW 5000 CFM EV-HM 4000 CFM, EV-HM 4500 CFM 21" x 29" 3 EV-BW 4000 CFM 30" x 35" 4 EV-HM 5500 CFM, EV-HM 6500 CFM 35" x 45" 4 EV-HM 7700 CFM 22" x 45" 8 EV-HM 9400 CFM, EV-HM 10400 CFM 26" x 22" 1 EV-WH2902 26" x 54" 8 EV-HM 12700 CFM, EV-HM 14000 CFM
