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The PureGuardian SPA101 is a small ultrasonic diffuser that turns water and a few drops of essential oil into a cool, fine mist. It runs quietly, has no heating element, and shuts off when the water runs out. An 8-inch body with a color-changing night light that can be switched off makes it a fit for a bedroom, office desk or small spa corner. It is a basic single-room unit, so shoppers wanting app control, timers or coverage of large rooms should look at larger or smarter diffusers.
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Lowest price we've seen: $29.99 on Nov 7 at Home Depot. Tracked across 4 stores since Nov 7.
Owners rate it around 4.2 out of 5 and mostly praise its quiet mist and the night light. Complaints center on the small tank and the need to refill often.
The PureGuardian SPA101 is an electric ultrasonic aromatherapy diffuser. It uses ultrasonic technology to disperse a cool, fine mist and fill the room with the scent of essential oils. No heating element is required.
To use it, add a few drops of essential oils to water in the reservoir for a continuous ultrafine mist. The unit shuts off when empty. It operates quietly, so it won't disturb sleep.
The compact design stands 8 inches tall. It includes a color-changing night light that can be turned on or off. The water reservoir is BPA-free.
