Aufguss is the German word for an infusion ritual: water mixed with scent, poured on hot stones, and the resulting steam waved through the room with a towel. In commercial saunas it is theatre, performed by a Saunameister to music. At home it is much simpler, and it is the single cheapest thing you can do to make a sauna session feel like an event.
What you actually need
A bucket of water, a sauna infusion concentrate, a ladle, and a towel. That is it. A dedicated aroma bowl that hangs on the heater is a nice upgrade because it releases scent slowly instead of all at once, but it is not required.
The one rule that matters
Never pour concentrate directly onto the stones. Ever. Undiluted oil on 300 °C rock scorches instantly, smells acrid for the rest of the evening, and in a badly ventilated room it is a genuine irritant. Dilute it: roughly 10 ml of concentrate into a litre of water, then ladle that mixture.
If a product tells you to pour it neat on the stones, it is not a sauna infusion, and we would not sell it.
How to run one at home
Get the room up to temperature first and let people settle. Mix your infusion in the bucket. Then pour two or three ladles across the stones, spread out rather than in one spot, and wait a few seconds for the steam to rise and hit the ceiling.
Now the waving. Take a towel by two corners, and use big slow figure-of-eight or helicopter motions above your head. You are not fanning people directly — you are mixing the hot scented air that has collected at the ceiling and pushing it down into the room. Do this for thirty seconds or so, then let everyone sit with it.
A full aufguss is usually three rounds of this, each a little more intense, over eight to twelve minutes. Anyone who wants to leave should leave — that is a normal part of the ritual, not a failure.
Which scent, and when
Eucalyptus is the one people know. Sharp, opens the chest, best in the first round when you still have energy for it. Mint and menthol feel colder than the room actually is and are excellent for the last, hardest round. Pine and fir smell like a forest cabin and are the safest choice if you have guests with opinions. Birch is the classic Nordic infusion, softer and slightly sweet. Citrus works in the morning. Lavender is the one to end on, because it does not fight the rest you are about to do.
If you do not know where to start, a discovery set of three scents costs less than committing to a full bottle of something you turn out to dislike.
Ice balls: aufguss without the timing
Frozen aufguss is the low-effort version. You freeze scented water into a ball, place it on the stones, and it melts slowly instead of flashing off at once. The scent releases over several minutes and the steam is gentler. It is a good option if you are alone and do not fancy standing up to wave a towel around.
Ventilation
Scent needs somewhere to go. If your sauna has an adjustable vent, open it slightly during and after an aufguss. A room that holds yesterday's eucalyptus is not atmospheric, it is stale.
A note on what is in the bottle
We read the ingredient list on every concentrate before it goes on the site, and we smell all of them hot and cold, because a scent that is lovely at room temperature can turn sharp and synthetic over stones. That is why this part of the shop is smaller than it could be.