Your Scent Machine Came With Oil. What Should You Buy Next?

The bottle that came with your cold-air diffuser is almost empty. How to choose your first real refill: the right type of oil, the right size and a scent you will love.

Most scent machines arrive with a small starter bottle. It runs out quickly, usually just as you have started to love having a scented home or business. Here is how to choose what comes next.

The short answer

Buy a fragrance concentrate made for waterless (nebulizing) diffusers, in a size that matches how much you use, and choose a scent by family rather than by name. If your machine takes a refillable oil bottle, you are not locked into the brand that came in the box.

Step 1: Check what your machine takes

Refillable oil bottle (screw-on or drop-in): you can use any good cold-air concentrate.
Sealed cartridge: these cannot be refilled; you would need cartridges from the maker or a refillable machine.
Water tank (ultrasonic): this is a different kind of diffuser. Concentrates are not for it.

Step 2: Choose a size

Your starter bottle tells you how fast you use oil. If it lasted:

Two to four weeks: move to 500 ml.
A week or two (business or large space): go straight to 1 litre.
Over a month (one room, light use): 120 ml is fine while you explore scents.

Step 3: Choose a scent by family

If you liked the starter scent, note what it smelled like, then pick the family:

Clean and calm (white tea, linen, musk): Thé Blanc
Bright hotel lobby (citrus, white flowers): Grand Foyer
Fresh and airy (lemon, sea breeze): L'Eau de Verre
Warm wood and leather: Santal Vellum or Cèdre Noir
Soft floral: Velours Rose
Deep and resinous: Oud Nº1

Not sure? In Canada, try a 5 ml sample first.

Step 4: Switch cleanly

Let the starter bottle run out, wipe the bottle connection, then fit the new oil. If you are changing scent families, see how to switch scents.

Step 5: Set it and forget it

Once you know your monthly use, a standing order brings the next bottle before you run out.

Our concentrates are made for waterless (cold-air, nebulizing) diffusers that have a refillable oil bottle. They are not for water (ultrasonic) diffusers or sealed-cartridge machines.

Quick answers

Do I have to buy oil from the brand that made my scent machine? No, if it takes a refillable bottle. Any concentrate made for waterless diffusers will work.

What size refill should I buy for my scent machine? Base it on how long the starter bottle lasted. Most homes move to 500 ml; businesses to 1 litre.

Will a different oil damage my machine? A concentrate made for waterless diffusers will not. Avoid watered or carrier-heavy oils.

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