Set Up Your Grand 300™ in Minutes

1. What’s Inside the Box

  • Grand 300™ Waterless Diffuser
  • UK Mains Power Plug
  • Wall-Mount Kit
  • Magnetic Key
  • HVAC Connection Tube
  • Instruction Manual

2. Open & Add Fragrance Oil

⚠️ Important: Use Nobl Parfums fragrance oil only. Do not add water.

  1. Hold the magnetic key 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 begin running on default settings immediately.
  4. Download the app to customise your scent strength and scheduling.

3: Download the App

Download the Scent Master Pro app on your phone:

Note: Once installed, ensure Bluetooth is enabled on your smartphone to allow the app to pair with your diffuser.

4. Connect to the Diffuser

  • Open the app and select your device from the list (it will appear as a short code, e.g., BXXXJ-…).
  • Enter the default password: 9999 and tap confirm.

5. Create & Manage Schedules

  • Label Scent: Use the ‘Note’ field to name the oil currently in use.
  • Intensity: Adjust the fan level (Off · Low · High).
  • Schedules: Tap + to create a new window (up to 5 unique schedules per day).
  • Edit: Tap the time to modify a specific window.

6. Program a Schedule

  • Select days – Tap the days you want the diffuser to run
  • Set hours – Choose a Start and End time

Set frequency

  • Work – Diffusion time per cycle (e.g. 10s)
  • Pause – Rest time between cycles (e.g. 120s)
  • Save – Tap Confirm to apply
  • Delete – Tap the red X, then the red delete icon on the right

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.