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Hi there, this is Krystal with Dyson. Thank you for your interest in the Dyson AM09. It is safe to use overnight while sleeping. It will, however, shut off completely after 9 hours of continuous use while being used as a heater. Best Wishes, Krystal Dyson Customer Service
Sorry, there was a problem. Please try again later.I have used this to heat my Mom's bedroom for all of last winter and this one so far. Heater is cool to the touch. I had the same worry about safety and this unit has completely satisfied my reservations.
Sorry, there was a problem. Please try again later.The heater turns itself off when it reaches the temp you set it on. It will then turn on again when the temp in the room falls below your temp setting.
Sorry, there was a problem. Please try again later.Absolutely. I leave mine on all even without issue.
Sorry, there was a problem. Please try again later.The safety features allow for 24 hour use but, use caution as with any product in an unsupervised condition.
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