Our Grandi Square is our most powerful machine which uses nebulisation technology makes it ideal for large spaces. Stylishly designed yet nimble to be part of an interior with minimal invasion space. With sufficient oil storage, this machine will diffuse for a long period of time before needing a refill.

Operated by Bluetooth using the Hydur scenting app, you are able to control your diffusion levels and set to continuous diffusion or set it based on your preferred time and day.

With a twenty-intensity diffusion setting, this diffuser is impeccable.





Large Space


480ml Oil Capacity

Bluetooth app Controlled

Up to 150sqm Coverage

Adjustable Scenting Schedule


The Grandi Square nebulisation technology uses the Bernoulli principle, a theorem of fluid dynamic wherein as the speed of moving fluid increases, the pressure within the fluid decreases. It atomises and forces the breakdown of the scenting oil into ultra dry nano-particles, diffusing it into the air, by high velocity air pressure. Unlike ultrasonic diffuser, the Grandi Square does not require water or heat to enjoy the scent. It releases a more potent vapor since it diffuses oil without the need of dilution, thus creating a more intense and lingering aromatic experience. It also has scent intensity controls that allow you to determine the amount of essential oil being released into the air.


  • No water or heat required
  • Disperses scenting oil quickly and effectively
  • Large coverage
  • Does not leave any residue


  • 480 ml oil capacity which lasts up to 3 months
  • No water required
  • No complex settings
  • Adjustable scenting schedules and intensity
  • Low to no noise
  • Controlled via Hydur Scenting bluetooth mobile app


  • Dimension: (H) 205 mm (W) 205 mm (L) 88 mm
  • Net Weight: 0.58 kgs
  • Gross Weight: 3.30 kgs
  • Coverage: Up to 150 sqm
  • Power: 6.0 w
  • Input Voltage: DC12v
  • Oil Consumption: 0.08 ml – 1.20 ml per hour


Step 1: Press the suction cup firmly to the front case of the machine and remove the panel, In case the grip is not too strong, add a few drops of water for stronger grip.

Step 2: Remove the tube from the atomiser head first, holding the lower part of the bottle take it out of the machine, carefully lowering the atomiser head.

Step 3: Unscrew the atomiser head from the bottle and fill with scenting oil.

Step 4: Replace the atomiser head back onto the bottle firmly.

Step 5: Keep the machine upright and connect the tube back onto the atomiser head and securely place in machine and attach the front panel.

Step 6: Plug in the power adapter to turn the machine ON, the machine will beep to indicate its ON and ready to operate.

Step 7: Adjust the desired intensity level by connecting to Bluetooth using the Hydur scenting app which
allows you to control your diffusion levels and settings based on your preferred time and day. The Hydur Scenting Controller app is available to download on IOS or android.

Step 8: Place your Grandi Square Diffuser on a Flat Surface or mount it to the wall in your home, retail store, restaurant, salon, meeting room, office, or any ventilated indoor space.


Taking care of your diffuser

To keep your diffuser clean and ensure the best mixture of Hydur Fragrances it is recommended that you perform a cleaning cycle on your diffuser at least once a month, if you use your diffuser daily or in case any of these situation happens:

  • Switch or change to another Scenting Oil
  • Atomization volume becomes weak or there is no mist or less mist than usual


To do a cleaning cycle on your diffuser, follow these steps:
Step 1: Turn the device off and unplug prior to cleaning.
Step 2: Gently wipe the plate using a cotton swab dipped in rubbing/isopropyl alcohol.
Step 3: Fill a clean bottle with isopropyl alcohol.
Step 4: Install the bottle filled with rubbing alcohol to the diffuser and turn it on. Let it diffuse for 5-20 minutes or until the essential oil scent wears off.
Step 5: Replace the bottle of rubbing/isopropyl alcohol with your scenting oil.

Note: If scenting oil begins to build up on the lid, gently wipe it off using water or alcohol. Do not use aerosol sprays, solvents, or abrasives to clean the plastic or metal housing.

Reusing scent bottles

To clean and reuse your bottles, follow these steps:
Step 1: Prepare a large tub and have a bath towel you can lay on your counter to soak up the water.
Step 2: Unscrew the cap from the diffuser.
Step 3: Soak the bottle in a tub of warm, soapy water for 10-15 minutes.
Step 4: Put them in a new tub of warm water combined with a 1/2 cap of non-toxic cleaner and let it soak for 5-10 minutes.
Step 5: Soak the bottle, rinse one last time and let it air dry on a towel until they are completely dry.

Safety care

  • Unplug the diffuser immediately and discontinue use in the event of smoke or a burning smell
  • Do not wrap the adaptor with cloth, paper, or anything that may result to avoid abrasions, cuts, fraying, crimping, and kinking
  • Do not disassemble or attempt to self-repair the diffuser, this will void the warranty. Any damage caused by the user does not qualify for replacement by Hydur Fragrances
  • Disconnect the diffuser from power adaptor before refilling, cleaning or moving the diffuser
  • Clean the sensor with a rubbing alcohol-soaked cotton swab
  • Do not use metal objects to clean the sensor; use only a cotton swab or cloth dipped in isopropyl alcohol or a neutral detergent
  • Make sure to clean the unit before switching to different scenting oils
  • Use only essential oils or Hydur scenting oils. Artificial, synthetic, or impure oils and fragrances can damage the diffuser.
  • Avoid placing the diffuser in direct sunlight, close to a refrigerator or fan, or in a hot environment
  • When not in use, clean the diffuser and store dry at 0°C—50°C, 5%-95% humidity.


Why is the diffuser not working?

DC12 cable may not be properly plugged in.

  • Check if the power is on or off.
  • Check if there is scenting or essential oil inside the bottle.

Why is there no mist coming out of my diffuser?

Your atomiser head might be blocked.

  • Check if there is any scenting oil build up on the plate. In case there is a buildup, follow the cleaning instructions.

Why is the diffuser leaking?

Your diffuser head is either displaced or the the diffuser is tilted.

  • Check that the diffuser head is screwed properly to the bottle.
  • Make sure that the diffuser is set on a hard, flat surface.
  • Keep the diffuser constantly vertical do not tilt or keep the diffuser horizontal.

Do I need to put water on the diffuser?

No. The Grandi Square diffuser does not use water. It atomise the scenting oils using a series of tubes, dispersing the oils in their purest form.

What type of oils can I use on the diffuser?

The Grandi Square diffuses 100% essential oil or Hydur Scenting Oil. Other blends and oils may contain fragrances, base oils or synthetics that could result in malfunction. Hydur Scenting Oils are carefully blended and curated for Hydur Diffusers.

What if the scent is too strong/weak for me?

If you find the mist/intensity is too strong or weak, adjust the diffuser intensity to either a higher or lower setting to suit your preference.

What are the intensity settings for the Grandi Square?

The Grandi Square has 20 scent intensity settings:

Intensity Level Indicator Light Length of Diffusion Interval Between Diffusion Oil Consumption (ml/hr)


15 secs

5 mins

0.08 ml


15 secs

2.5 mins

0.14 ml


20 secs

2 mins

0.21 ml


20 secs

1.25 mins

0.27 ml


25 secs

1.20 mins

0.33 ml


30 secs

1.15 mins

0.40 ml


30 secs

1 min

0.46 ml


30 secs

50 secs

0.52 ml


30 secs

40 secs

0.58 ml


30 secs

33 secs

0.65 ml


33 secs

30 secs

0.71 ml


40 secs

30 secs

0.76 ml


50 secs

30 sexs

0.82 ml


60 secs

30 secs

0.87 ml


75 secs

30 secs

0.93 ml


80 secs

25 secs

0.98 ml


85 secs

20 secs

1.04 ml


120 secs

20 secs

1.09 ml


150 secs

15 secs

1.15 ml


300 secs

15 secs

1.20 ml

What is the average oil consumption of Grandi Square?

Average scenting oil consumption ranges from 0.08 ml – 1.20 ml per hour.

How much area does a Grandi Square cover?

A Mini Tower will cover up to 150 square meters.

What is included when I buy a Grandi Square?

The Grandi Square includes:

  • (1) Grandi Square Diffuser
  • (1) 480ml Scent Bottle and Scenting Oil
  • (1) Hydur Eco Bag
  • (1) DC12 Power Adaptor
  • (1) Suction Cup
  • (1) PU Tube
  • (1) HVAC Adaptor
  • (1) PTFE Tape
  • (1) Wall Mount
  • (4) Screws

Do I need to clean the diffuser?

Yes. It is recommended that you perform a cleaning cycle at least once a month.

How long will my diffuser last?

A 480ml bottle can last approximately 3 months, depending on the intensity settings and diffusing times.

How do I turn the diffuser on?

Connect the DC12 power adapter to the outlet and turn the power switch on. Local time and scent intensity levels will appear.

Where is the best place to put my diffuser?

You can put your diffuser on either a table or the floor. Ideally, it would work best if you position it in the center of the room. If placing it on a shelf, desk, or some type of table, be sure it’s stable and not prone to accidents. Alternatively, you can wall mount it or connect to the HVAC. If you prefer wall mounting, make sure it is secured properly and is at least 6 feet above the ground and 2 feet from the ceiling. If you are using it in your bedroom, keep it at least 3 feet away from your bed. Choose flat surfaces and avoid placing it on or near any heat sources such as a furnace, heater, or direct sunlight.

How do I mount the Grandi Square to a wall?

To mount the Grandi Square on your wall, simply:

Step 1: Attach the wall bracket with all the supplied screws or nails (depending on the surface).

Step 2: Hang the diffuser on the hinges.

Make sure the Grandi Square is mounted accurately straight up and not tilted.

How do I reset the password of the Hydur Scenting app?

In case you forget the password, simply press the reset button to restore to factory settings. The default password is 8888.

How do I set up my Grandi Square diffuser?

To set up your Grandi Square, simply:

Step 1: Download the Hydur Scenting Controller app from Google Playstore or App Store.

Step 2: Turn on your bluetooth.

Step 3: Open the Hydur Scenting Controller app. You should see the name of one of your Grandi Square.

Step 4: Select from the list your Grandi Square device and enter the default password, 8888.

Step 5: Set up and configure your scenting schedule(s) desired.

How do I create a scenting schedule?

To create a new scenting schedule using the app, simply:

Step 1: Select “Add New” under the “Schedule” section on the Homepage

Step 2: Choose to create your own schedule, or select one of the pre-set schedules

Step 3: Enter your desired Start time, End time, Name and intensity. If you would like the schedule to repeat, select the day(s) you would like it to repeat.

Step 4: Click “Save"

Will my Grandi Square work even if I am not connected to the app?

Yes. The diffuser will keep the schedules you have set. Once you reconnect via Bluetooth you can change the schedules, adjust the scent intensity or turn the diffuser off manually.