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A Vicks voaporizer may be left on through the night under the following circumstances: 1. There is nothing flammable within 2 feet of the vaporizor, like bedsheets or towels.

2. It is either plugged directly into a wall outlet or into a surge protector with nothing else plugged into it, or it is plugged into a heavy duty extension cord that is rated for the appropriate voltage/amps of the unit.

3. There is plenty of water in the resevoir.

4. There are no open plugs or open wires within 2 feet of the vaporizor

Under these circumstances, a vaporizor would not be a fire hazord at all.

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15y ago

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