U4 Waterless Whole-House HVAC Scent Diffuser
Waterless Cold-Air Diffuser
Cruelty free
No residue
Child and Pet Safe
What is Cold-Air Dual-Fluid Technology?
No water. No heat. Just pure scent.Our tech turns oils into an invisible, weightless mist (1-19 microns) using only air pressure. Like a perfume atomizer for your home—zero dilution, zero residue, and zero humidity. Perfect for sensitive noses, wooden furniture, and spaces where cleanliness matters.
Why Cold-Air Diffusion Outperforms?
✔️No water waste. Oils last 3x longer than in watered-down ultrasonic diffusers.
✔️No mold dramaWater-free = 14% chance of slimy tanks. Just add oil and breathe.
✔️Tweak your vibeAdjust mist intensity from “barely there” to “whole-room bliss” with a dial.
Cold-Air Dual-Fluid vs. Ultrasonic
✖️ Ultrasonic: Water mess, mold risk, foggy residue.
✔️ Ours: Pure air diffusion. No water. No mold. No scrubbing.Your win:
✨ Scents last 3x longer (no water dilution)
✨ 6 months of "set & forget" vs. daily refills
✨ Hygienic self-clean – Just run 70% alcohol for 10 mins (no disassembly!)
"Finally, a diffuser that works harder than I do." – 2,300+ 5-star reviewsTry risk-free – Love it in 21 days or your money back.
Choose options
- 3,000 Sq.Ft HVAC Coverage: Connects directly to your HVAC system for even, whole-house scenting. Supports standalone or wall-mounted setups.
- Waterless Cold Air Nano-Mist: Transforms pure oils into a 1-5μm ultra-fine mist without heat or water. Preserves fragrance purity.
- Smart App & On-Board Control: Easily adjust 7 intensity levels and 9 timers via device buttons, or schedule custom weekly cycles via the App.
- LCD Display & 15% Low-Oil Alert: Real-time tracking of time, temperature, and humidity. Automatically alerts you before the oil runs dry.
- 4× Turbo Fan & 300ml Capacity: Accelerates scent distribution 4× faster in standalone mode. Whisper-quiet and family-friendly design.
Model: U4
Voltage: 100-240v
Power: 8W
Capacity: 300ml
Material: Textured plastic (non-slip, leather grain appearance)
Noise Level: <40db
Coverage Area: Up to 3000 Sq Ft
Dimensions: 91*70*140mm
Weight: 1 kg
Control Modes: APP Mode / Manual Button
Connectivity Bluetooth (Aromaadd App)
1.Power off the device before maintenance or refilling oils. Never operate while powered on.
2.Keep upright at all times. Tilting may cause oil leakage or component damage.
3.Use approved oils only. Never add non-compatible liquids (e.g., solvents, flammable substances).
4.Child safety first:Keep out of reach of children to prevent electric shock, injury, or accidental ingestion.Store oils separately in childproof containers.
5.Sanitize monthly: Run 70% isopropyl alcohol through the device for 10 minutes to clear nozzle clogs.
6.Avoid liquid contact:Never submerge or splash water on the device.Wipe spills immediately with a dry cloth.
7.Follow the manual: Operate only as directed in the official user guide
