“How much does it cost to run the cooling function and how cool can it be”
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Hi there Blah, this is Tia from Dyson. Operating costs for the Dyson HP09 Hot + Cool Formaldehyde purifier will vary depending on use. For reference, the unit will draw 40 watts of power when using it on cooling/fan mode. The Dyson Air Multiplier™ fan cools a person by moving air over and around them. It's the air flow that from our blade-less fan that provides personal cooling effects. With that being said, you will not want to expect the ambient air in a room to drop in cooler temperatures when only using a fan. Thanks for your support of Dyson technology! Best wishes, Tia Dyson Customer Support
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