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Swamp Cooler Average Costs. 1  A whole house swamp cooler might cost $1,500 to $4,500 installed. 2  Two-stage evaporative coolers, which produce less in-home humidity by cooling the air before it passes through the moist pads, are quite a bit costlier than the one-stage coolers described above.
The machines vary in cost depending on an officeâs size, but a typical system costs anywhere from $250 to $400 per month for unlimited use. Grundy notes that traditional water coolers vary widely in priceâanywhere from $50 to $500 a monthâsince costs are based on consumption, so âour prices are much more predictable.â. The company may still be in its early stages, but Grundy says initial feedback has been encouraging.