This is the question that comes straight after "how much does the unit cost". And it is the right one, because you pay for the machine once and for the fragrance every month.
What consumption depends on
A cold-air nebuliser does not evaporate the liquid: a pump breaks it into micro-particles. Consumption has nothing to do with heat or humidity and everything to do with three things you control:
- Intensity. How much product is released with each pulse.
- Cycle. How many seconds it works and how many it rests.
- Schedule. How many hours a day it is switched on.
The size of the space matters indirectly: a large venue needs more intensity before anyone notices the scent, so it uses more.
The calculation, step by step
- Multiply the hourly consumption shown on the data sheet by the hours the unit runs each day.
- Multiply that by the days you open per month.
- Divide the bottle size by the result and you know how many months it lasts.
An example with round numbers: if a unit uses around 350 ml a month over normal trading hours, a 500 ml bottle lasts a little over a month and a 1 litre bottle covers almost three. If you only run it at weekends, that same litre can stretch to six months.
What quietly pushes the cost up
- Leaving it on for 24 hours when the venue opens for 10.
- Turning the intensity to maximum on day one because "it does not smell of anything". Your nose adapts within minutes; your consumption does not.
- Scenting busy, well-ventilated thoroughfares with the doors wide open.
- Not setting any schedule and letting the unit work through the small hours.
Adjusting the schedule is what saves the most, and it costs nothing. The video tutorials explain how to do it from the app on the models that have one.
Working out the monthly cost
Take the price of the bottle (always + VAT), divide it by the millilitres it contains and multiply by the millilitres you use in a month. That is your real scenting cost, and it is usually a good deal lower than people imagine before they do the sums.
If you would rather not run the numbers every month, the monthly scenting subscription covers the equipment and that month's fragrance in a single fixed amount.
A note on bottle sizes
The large bottle is almost always better value per millilitre, but only if you are going to use it within a reasonable time. If you have a small unit in an office and you buy a litre, it will take you a very long time to finish it. Better to match the format to your actual consumption.
You can see the available formats in the fragrance catalogue. If you are unsure about your own case, write to us at info@bendis.es with the floor area and the opening hours of your venue.
