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Deal.ai › Aroma Diffusers
Pure Guardian
Pure Guardian spa101 Ultrasonic Cool Mist Aromatherapy Essential Oil Diffuser

Pure Guardian spa101 Ultrasonic Cool Mist Aromatherapy Essential Oil Diffuser

4.2(81 ratings)

Best price now

$29.99at Home DepotObserved at 1:17 PM

19% under what the other stores charge

Compared across 5 stores. Prices are checked against each store and labelled with when.

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Our take on the Pure Guardian spa101 Ultrasonic Cool Mist Aromatherapy Essential Oil Diffuser

The Pure Guardian Spa101 is a small ultrasonic diffuser that adds cool mist and essential oil scent to a bedroom, office or bathroom. It stands about 7.9 inches tall and 4.4 inches wide, weighs just over half a pound, and shuts off automatically when the water runs low. The best new price is $29.99 at Home Depot as of November 7, 2026, with five stores listing it new.

Best forSmall bedrooms and nurseriesDesk or office useBathroom and entryway scentingBuyers who want a low-cost first diffuser
Pros
  • Compact footprint fits on a nightstand or desk
  • Light at about 0.53 lb, easy to move between rooms
  • Automatic shut-off when water runs out
  • Ultrasonic mist runs quietly
  • Low entry price at $29.99
Cons
  • Small tank means frequent refills
  • Mist output suits only small rooms
  • Light plastic build
  • No timer or app controls

Pure Guardian spa101 Ultrasonic Cool Mist Aromatherapy Essential Oil Diffuser prices at every store

  • Home DepotNew

    In stock

    $29.99Observed at 1:17 PM
    Visit Home Depot
  • Kohl'sNew

    In stock

    $31.99Observed at 1:17 PM
    Visit Kohl's
  • eBayNew

    In stockSold by ofryassor123

    $36.89Verified
    Visit eBay
  • QuillNew

    In stock

    $46.79Free shippingObserved at 1:17 PM
    Visit Quill
  • WayfairNew

    Out of stock

    $39.99Observed at 1:17 PM
    Visit Wayfair

Also available at

  • eBayCheck price at eBay
  • QuillCheck price at Quill

Store links may earn us a commission. Some prices via Klarna.

Pure Guardian spa101 Ultrasonic Cool Mist Aromatherapy Essential Oil Diffuser price history

Lowest price we've seen: $29.99 on Nov 7 at Home Depot. Tracked across 6 stores since Nov 7.

What reviewers say

  • 4.2 / 581 ratings

Owners of small Pure Guardian diffusers generally find them quiet and easy to use for a bedroom or desk, and the auto shut-off is a common plus. Complaints tend to center on the small tank and the need to refill often.

What people mention
  • NoisePraisedOwners say the ultrasonic mist is quiet enough for a bedroom.
  • Tank sizeCriticisedReviewers note the small reservoir needs refilling often.
  • Auto shut-offPraisedBuyers like that it turns off by itself when the water runs low.
  • BuildMixedSome find the plastic body light and basic, though fine for the price.
  • CoverageCriticisedMist is described as enough for a small room but not a large one.

Specifications

Type
Electric Diffuser
Width (")
4.409Source
Color
Green, White, MulticolorSource
Height (")
7.913Source
Weight (lb)
0.529Source

Questions and answers

How long does the tank last?
The tank is small, so expect a few hours of mist per fill. Plan on refilling before a full night.
Does it shut off automatically?
Yes. It cuts off when the water level gets too low, so it can run unattended.
Is it quiet enough for a bedroom?
Yes. Ultrasonic mist is quiet; most owners report no trouble sleeping with it running.
What size room does it suit?
It works best in small spaces such as a bedroom, office or bathroom. It will not scent a large open living room.
Can I use it with any essential oil?
It is designed for essential oils added to water. Follow the dilution guidance and clean the tank between oils.
Is $29.99 a good price?
At $29.99 at Home Depot as of November 7, 2026, it sits at the low end for a name-brand ultrasonic diffuser with auto shut-off.
Where is the Pure Guardian spa101 Ultrasonic Cool Mist Aromatherapy Essential Oil Diffuser cheapest?
At Home Depot, for $29.99, 19% under what the other stores charge, as of our latest check.
What do buyers say about the Pure Guardian spa101 Ultrasonic Cool Mist Aromatherapy Essential Oil Diffuser?
Rated 4.2 out of 5 from 81 ratings.
Where can I buy the Pure Guardian spa101 Ultrasonic Cool Mist Aromatherapy Essential Oil Diffuser?
5 stores we checked sell it, including Quill, eBay, Home Depot, Kohl's, Wayfair.

Stores we've priced the Pure Guardian spa101 Ultrasonic Cool Mist Aromatherapy Essential Oil Diffuser at

  • Home Depot deals and prices
  • Kohl's deals and prices
  • Wayfair deals and prices