Diffusers

A cold air diffuser, also called a nebulising diffuser or waterless scent diffuser, uses pressurised air to atomise pure fragrance oil into an ultra-fine dry mist — no water, no heat. This preserves the full complexity of every scent note and delivers a richer, longer-lasting fragrance experience than ultrasonic diffusers. It's the same technology used in five-star hotels worldwide.

Ultrasonic diffusers mix fragrance oil with water and use vibration to create mist, which dilutes the scent before it reaches the air. Cold air diffusers use only pure oil, producing a more concentrated, true-to-scent experience with no humidity added to your room. The result is a genuine fragrance atmosphere rather than a faint background smell.

It depends on the size of the space you want to scent. Our Scent Mini covers up to 100m², the Scent Mist covers up to 300m², and the S3000 covers up to 5,000m³ for large commercial spaces. For most Australian open-plan living and dining areas (60–90m²), the Scent Mist is the ideal choice.

Yes. All Ascent diffusers use waterless cold air technology with no heat, reducing burn and spill risk. Our fragrance oils are IFRA-compliant and free from harmful additives. We recommend using as directed and ensuring adequate ventilation in smaller spaces.

You can use third-party oils, but we recommend Ascent Collection oils for the best experience. Our diffusers are engineered for pure, waterless aroma oils without fillers or alcohol. Oils with additives can clog the atomiser, reduce performance, or void your warranty if damage occurs.

Yes. All Ascent diffusers come with Bluetooth or Wi-Fi app control, allowing you to adjust fragrance intensity, set on/off schedules, and create up to five custom scenting periods per day — all from your phone. Perfect for setting your home to smell incredible before you walk in the door.

This depends on the diffuser model, the intensity setting, and how many hours per day you run it. At moderate settings, most 200ml bottles last 4–8 weeks. Running your diffuser on a schedule rather than continuously is the best way to extend oil life without sacrificing scent quality.

Very little. You'll need to refill the fragrance bottle when empty and clean the unit every 6 months using Ascent Collection Diffuser Cleaner. Our diffusers are designed for long-term continuous use and typically last 3–5+ years with basic care.

We offer a 21-day money-back guarantee from the date you receive your diffuser. To be eligible, the diffuser must be unused and in its original packaging. Full details are available on our Returns page.