Set Up Your Grand 300™ in Minutes

1. What’s Inside the Box

  • Grand 300™ Waterless Diffuser
  • US Power Plug
  • Wall-Mount Kit
  • 2x Magnetic Keys
  • HVAC Connection Tube
  • Instruction Manual

2. Open & Add Fragrance Oil

⚠️ Important: Use fragrance oils formulated for cold-air, waterless diffusers. Do not add water. For best performance, we recommend our fragrance oils.

  1. Hold the 2x magnetic keys over the small circular cut-out on the upper right side panel to release the bottle housing.
  2. Remove the empty bottle and insert your chosen 200ml fragrance oil.
  3. Plug in the diffuser—it will show a red light.
  4. Download the app to customise your scent strength and scheduling.

3: Download the App

Download the Nobl Parfums app on your phone:

Note: Once installed, make sure Bluetooth is enabled on your phone so the app can find your diffuser.

4. Connect to the Diffuser

  • Open the app and tap Connect Diffuser
  • Select your diffuser from the list
  • The password will already be prefilled as 9999
  • Tap OK to continue

5. Create & Manage Schedules

  • Name: Rename your diffuser
  • Fragrance: Enter the scent in use
  • Fan Level: Choose Off, Low or High
  • Tap + to add a schedule
  • Use the toggle to switch a schedule on or off
  • Tap X in the top left, then tap the – icon to delete a schedule
  • Tap Change Passcode to update the default password

6. Program a Schedule

  • Tap Days to choose when the diffuser runs
  • Set the Start and End time

Under Frequency, set:

  • Scent On = how long the diffuser runs each cycle
  • Scent Off = how long it pauses between cycles

Tap Save to confirm

To delete a schedule, tap X first, then tap the – icon

Optional: HVAC Installation

For whole-home scenting via your HVAC system.

  1. Attach the included hose to the diffuser’s outlet using the quick-connect nozzle. Position the diffuser near a power source and check the hose length.
  2. Drill a small hole in the HVAC supply duct, just wide enough for the hose. Insert the hose 3–4 inches into the duct.
  3. Secure everything in place, then use the app to test and adjust scent output.

Need help?

If you have any questions or need support, contact us at help@noblparfums.com. Our team is happy to help.