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I tried both. Yes the main difference is the air purifier, but also the size because the base is designed to contain the filter. I also noticed that with the HP01 the air flows better and is good for a larger space. I did not keep it because it is more than what we needed.
Sorry, there was a problem. Please try again later.Hi there, this is Kelly with Dyson. Great question! The AM09 is our heater + fan. This machine will not provide any level of purification, and there is no included filter. The HP01 will operate just like the AM09, but there is a filter that sits inside of the shroud at the bottom of the unit. This machine does provide purification. Best wishes, Kelly Dyson Customer Support
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