★ SOSA Fragrance Planning
Machines times fills per year times tank size. That is the entire calculation.
★ ★ ★ ★ ★
★★★★★
"I needed a litres-per-year number for the budget. Machines times fills times tank size gave me one I could defend."
SOSA Vaayu · fragrance budgeting
★★★★★
"Four Vaayu, a fill roughly every 75 days at our settings. That is about twenty fills a year across the site."
SOSA Vaayu · multi-machine site
★★★★★
"Turning intensity down one step stretched the tank noticeably, and it read better in the room as well."
SOSA Vaayu · intensity setting
★★★★★
"They would not hand me a made-up monthly figure before seeing our run hours. I respected that more than a quick number."
SOSA Vaayu · consultation
★★★★★
"The 800ml reservoir on the Angaan means far fewer trips up the ladder on our floor."
SOSA Angaan · 800ml reservoir
★★★★★
"We log the refill date on every machine. The pattern settled after one quarter and the ordering became routine."
SOSA Vaayu · refill log
★★★★★
"I needed a litres-per-year number for the budget. Machines times fills times tank size gave me one I could defend."
SOSA Vaayu · fragrance budgeting
★★★★★
"Four Vaayu, a fill roughly every 75 days at our settings. That is about twenty fills a year across the site."
SOSA Vaayu · multi-machine site
★★★★★
"Turning intensity down one step stretched the tank noticeably, and it read better in the room as well."
SOSA Vaayu · intensity setting
★★★★★
"They would not hand me a made-up monthly figure before seeing our run hours. I respected that more than a quick number."
SOSA Vaayu · consultation
★★★★★
"The 800ml reservoir on the Angaan means far fewer trips up the ladder on our floor."
SOSA Angaan · 800ml reservoir
★★★★★
"We log the refill date on every machine. The pattern settled after one quarter and the ordering became routine."
SOSA Vaayu · refill log
★ The two machines and their two tank sizes
SOSA Vaayu400ml tank, up to about 75 daysView ₹11,999
SOSA VaayuA second unit on the same fill cycleView ₹11,999
SOSA Angaan800ml reservoir on the HVACView ₹25,999
✓ 400ml lasting up to about 75 days at typical use is roughly four to five fills per machine per year ✓ Intensity setting and daily run hours move that figure, so the exact number is confirmed on a consultation ✓ Made in India · independent, not affiliated with any hotel · a portion funds girl-child education
Founder Diaries · Multi-Machine Buying · Fragrance Planning
How long does a 400ml tank last in a commercial scent machine? In the SOSA Vaayu (₹11,999) a 400ml fill lasts up to about 75 days, which is the manufacturer's figure at typical use. That is an upper bound, not a promise: a higher intensity setting or a longer daily run schedule brings it down, and a fill lasting 50 days instead of 75 raises annual consumption from roughly 1.9 litres to about 2.9 litres per machine.
Does the SOSA Angaan use more fragrance than the Vaayu? It holds more. The SOSA Angaan (₹25,999) has an 800ml reservoir against the Vaayu's 400ml tank, and it is covering up to 3,000m³ rather than 1000m³. We do not publish a days-per-fill figure for it, because consumption depends on the run schedule and intensity on your HVAC, so it is set on a consultation rather than estimated from a blog.
See the SOSA Vaayu Book a scenting plan
Facts verified 24 August 2026 against the live SOSA product pages: the SOSA Vaayu (₹11,999) is a waterless cold-air nebuliser rated to 1000m³, described by the manufacturer as approximately 2,000-3,000 sq ft, with a 400ml refillable tank lasting up to about 75 days depending on intensity and run hours, Bluetooth app and button control, 1h/4h/8h/24h timers, adjustable intensity, operation under 38dB, DC 12V/1A at 5W, auto-stop and key-lock, and CE, RoHS and SGS certification. The SOSA Angaan (₹25,999) is an HVAC nebulising diffuser rated to 3,000m³, roughly 8,000-10,000 sq ft, with an 800ml reservoir, metal body, programmable schedules and operation under 42dB. Fragrance consumption figures on this page are arithmetic from those published tank sizes and intervals; actual usage depends on settings and hours and is confirmed on a consultation. Scent enhances the ambience and perceived quality of a space; it works alongside proper ventilation and cleaning and is not a substitute for either, and SOSA makes no claim that fragrance alone influences a purchase decision. The hotel-inspired scents are SOSA's own original interpretations; SOSA is an independent brand and is not affiliated with, or endorsed by, any hotel named for reference. Coverage, fragrance usage and running cost depend on the space, settings and hours of use, and are confirmed on a consultation. Prices and availability are subject to change - see the live product pages.
Procurement wants a litres-per-year number and a monthly figure they can put in a budget line. Both come out of the same short calculation, and the honest version of it includes a band rather than a single number, because the fill interval moves with intensity and run hours.
Quick answers — read this first
How do I calculate monthly fragrance requirements for multiple scent machines? Use three inputs: machine count, tank size and fill interval. A SOSA Vaayu (₹11,999) holds 400ml, which the manufacturer states lasts up to about 75 days at typical use, so one machine is roughly 4.9 fills and about 1.9 litres a year, or about 160ml a month. Four machines at that rate come to roughly 640ml a month. Higher intensity or longer daily hours shorten the interval and raise the figure, so the exact number is confirmed on a consultation.How long does a 400ml tank last in a commercial scent machine? In the SOSA Vaayu (₹11,999) a 400ml fill lasts up to about 75 days, which is the manufacturer's figure at typical use. That is an upper bound, not a promise: a higher intensity setting or a longer daily run schedule brings it down, and a fill lasting 50 days instead of 75 raises annual consumption from roughly 1.9 litres to about 2.9 litres per machine.
Does the SOSA Angaan use more fragrance than the Vaayu? It holds more. The SOSA Angaan (₹25,999) has an 800ml reservoir against the Vaayu's 400ml tank, and it is covering up to 3,000m³ rather than 1000m³. We do not publish a days-per-fill figure for it, because consumption depends on the run schedule and intensity on your HVAC, so it is set on a consultation rather than estimated from a blog.
The short answer
Short answer: multiply machines by fills per year by tank size. One SOSA Vaayu (₹11,999) holds 400ml lasting up to about 75 days at typical use, which is roughly 4.9 fills and 1.9 litres a year per machine, or about 160ml a month; four machines come to roughly 640ml a month at that rate, and more at higher intensity.
The pick: plan around the SOSA Vaayu (₹11,999) 400ml tank and its up-to-75-day interval, and the SOSA Angaan (₹25,999) 800ml reservoir where a zone is on HVAC.
Next step: tell us the machine count, intensity setting and daily run hours and we will confirm your monthly volume rather than estimating it - book a free scenting plan.
In this guide
Every number on this page comes from three inputs you already have: how many machines, how big each tank is, and how often it needs filling. The third input is the one that moves, which is why we confirm it on a consultation instead of printing a false precision.
The machines behind the numbers - tap either
400ml per tank
SOSA Vaayu · ₹11,999
800ml per reservoir
SOSA Angaan · ₹25,999
Get consumption confirmed
Free scenting plan
Straight answer
How do I calculate monthly fragrance requirements across several scent machines?
Three inputs, one multiplication: machines x fills per year x tank size. Start with the tank. A SOSA Vaayu (₹11,999) holds 400ml, and the manufacturer's figure is that a fill lasts up to about 75 days at typical use. Treat that as the upper bound it is. At 75 days, one machine takes 365 divided by 75, which is about 4.9 fills a year, so 400ml times 4.9 is roughly 1.9 litres per machine per year - and dividing 400ml by the 2.5 months a 75-day interval represents gives about 160ml a month. Four Vaayu on a site therefore come to about 640ml a month and around 7.8 litres a year, across roughly 19 or 20 refills. Now the honest part. That interval is not fixed. Run a higher intensity setting, or keep the machines on for fourteen hours instead of eight, and the same tank empties sooner. If a fill lasts 50 days at your settings, the arithmetic becomes 365 divided by 50, or 7.3 fills a year, which is about 2.9 litres per machine per year and roughly 975ml a month for the same four machines. So the truthful planning answer for a four-machine site is a band of about 640ml to 975ml a month, not a single figure. For a SOSA Angaan (₹25,999) the reservoir is 800ml and it is covering up to 3,000m³; we do not publish a days-per-fill number for it, so we set its consumption on a consultation from your run schedule rather than estimating it here. We will not quote you a rupees-per-month figure on a blog page either - fragrance choice, intensity and hours all move it, and a costed plan belongs on a consultation, where the numbers are yours rather than an average.
400ml per Vaayu tank, up to about 75 days at typical use, so roughly 4.9 fills and 1.9 litres per machine per year. Multiply by machine count, then widen the band for intensity and run hours.
The number that drives everything is the tank. A SOSA Vaayu holds 400ml lasting up to about 75 days at typical use, which is four to five fills per machine per year. Multiply by your machine count and you have a defensible annual volume.
See the SOSA Vaayu ₹11,999 Book a scenting plan
The inputs
Machine count, tank size and fill interval - nothing else is needed
The two machines and the two tank sizes
Fragrance planning only needs two numbers off the product pages: the tank size on each machine and the fill interval on the smaller one. Both images link to the live pages so procurement can verify them.
400ml per tank, up to about 75 days at typical use
SOSA Vaayu
Waterless cold-air nebuliser rated to 1000m³. The 400ml refillable tank is the unit your fragrance budget is built from: roughly 4.9 fills a year per machine at the manufacturer's typical-use figure, less if you run harder or longer.
From ₹11,999
A second unit on the same fill cycle
SOSA Vaayu (second unit)
Every extra machine adds another 400ml tank to the same calculation. Keeping them on identical intensity settings keeps the intervals aligned, which is what makes a single site-wide refill day possible.
From ₹11,999
800ml reservoir for an HVAC zone
SOSA Angaan
HVAC nebulising diffuser rated to 3,000m³, with an 800ml reservoir, metal body and programmable schedules. Twice the Vaayu's capacity, covering three times the air, with consumption set on a consultation from your run schedule.
From ₹25,999
The method - machines, fill interval, tank size
Three steps, and a fourth that most suppliers skip: state your assumption out loud so the number can be checked later against what actually happened.
1
Start from the tank
400ml per Vaayu, 800ml per Angaan
Tank size is the only fixed number in this calculation, so build outward from it. A Vaayu holds 400ml. An Angaan holds 800ml while covering three times the air. Write the tank size against every machine on your zone list, because two machine types on one site means two fill cycles and your ordering has to account for both.
Tip: list every machine with its tank size before you calculate anything.
The Vaayu tank is 400ml and refillable, which makes it the natural unit for a fragrance budget.
See SOSA Vaayu →
2
Turn the interval into fills per year
365 divided by days per fill
At the manufacturer's typical-use figure of up to about 75 days, one Vaayu takes 365 divided by 75, about 4.9 fills a year. Four machines are about 19.5 fills. Multiply fills by 400ml and you have litres: roughly 1.9 per machine, 7.8 across four. Do the same arithmetic at a shorter interval to get the other end of your band, because 50 days gives 7.3 fills, 2.9 litres per machine and about 11.7 litres across four.
Adjustable intensity on the Vaayu is what moves your fill interval, which is why it moves your budget too.
See SOSA Vaayu →
3
State the assumption, then confirm it
A band you can defend beats a number you cannot
Write the assumption on the same line as the answer: four machines, medium intensity, ten hours a day, fill interval taken at the manufacturer's typical-use figure. Anyone reviewing the budget can then see exactly which input to challenge. After one quarter, compare the real refill dates against the assumption and correct it. Exact consumption for your site is confirmed on a consultation, not estimated from a page like this one.
Tip: log actual refill dates for one quarter, then replace the assumption with your own number.
The Angaan holds 800ml; its consumption is set on a consultation from your HVAC run schedule rather than from a published day count.
See SOSA Angaan →
The SOSA principle
A supplier who gives you a precise monthly consumption figure before asking your run hours has guessed. The calculation is simple, but two of its three inputs belong to you, not to the machine.
Publish the assumption alongside the answer, and the answer becomes checkable.
A worked example, and the band it honestly falls in
Here is the same arithmetic laid out as a table, so you can find the line that matches your site and read the annual volume straight off it.
The SOSA plan
Fragrance volume by machine count, at the typical-use interval
| Your site | What to plan for |
|---|---|
|
One Vaayu at the typical-use interval
|
About 4.9 fills a year, roughly 1.9 litres a year, about 160ml a month at that rate. View → |
|
Two Vaayu on the same settings
|
About 9.7 fills a year, roughly 3.9 litres a year, about 320ml a month at that rate. View → |
|
Four Vaayu on the same settings
|
About 19.5 fills a year, roughly 7.8 litres a year, about 640ml a month; nearer 975ml if a fill lasts 50 days. View → |
|
One Angaan on HVAC
|
An 800ml reservoir covering up to 3,000m³; consumption is confirmed on a consultation from your run schedule. View → |
Two things follow once you have the volume. Turning litres into a delivery rhythm is a separate job - see how to plan bulk fragrance refills for multiple scent machines - and if you are also building the running-cost case, what it costs to run multiple scent machines every month adds the electricity line, which is genuinely small. If the machine count itself is not settled yet, start with calculating scent machine quantity for multiple rooms and zones.
Machines x fills per year x tank size
The SOSA Vaayu ₹11,999 tank is 400ml, lasting up to about 75 days at typical use. Send your machine count and run hours and we will confirm your monthly volume.
I would rather give a business a range it can plan against than a precise monthly figure that quietly assumes settings nobody has agreed to yet.
— Sonal Sahani, SOSA
What moves the interval
Intensity setting and daily run hours - which is why the answer is a band
The SOSA fragrance planning specification
Two machines, two tank sizes, one calculation. The Vaayu's 400ml tank lasts up to about 75 days at typical use and is the unit most fragrance budgets are built from; the Angaan's 800ml reservoir serves a much larger zone and has its consumption set on a consultation. Both are waterless and made in India, and a portion of every order supports girl-child education through Nanhi Kali.
The SOSA fragrance planning specification
Two machines, two tank sizes
| Machine | Best for | Why it works | Price |
|---|---|---|---|
|
SOSA Vaayu
|
The unit a fragrance budget is built from | 400ml refillable tank, up to about 75 days at typical use, adjustable intensity and 1h/4h/8h/24h timers | ₹11,999 View → |
|
SOSA Angaan
|
A large HVAC zone up to 3,000m³ | 800ml reservoir, programmable schedules, under 42dB; consumption confirmed on a consultation | ₹25,999 View → |
One thing we will not do on this page is print a rupees-per-month figure. Fragrance choice, intensity setting and daily run hours all move it, and a number that ignores those is a sales device rather than a plan. The method above is honest and repeatable; the costed version, with your settings in it, comes from a free scenting plan. Honest note - fragrance works alongside ventilation and cleaning, never instead of them, SOSA is independent and not affiliated with any hotel, and we make no claim that scent influences a purchase decision.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
Every procurement team asks me the same question in the same week of the year: how many litres, and what does it cost a month. It is a fair question and it deserves a real method rather than a confident guess. The method is short. Count the machines, take the tank size, take the fill interval, multiply. Where suppliers go wrong is not the arithmetic - it is pretending the interval is a constant.
So here is how I state it. A Vaayu tank is 400ml and the manufacturer's figure is up to about 75 days at typical use. That is roughly 4.9 fills and 1.9 litres a year for one machine, about 640ml a month across four. If you run a higher intensity or longer hours, the same four machines can want closer to 975ml a month. Both numbers are true; which one is yours depends on settings we have not agreed yet. An Angaan holds 800ml and gets its own line.
And the part I insist on: I will not print a monthly rupee figure I cannot stand behind. It would need your fragrance, your settings and your hours, and those come from a conversation, not a blog page. What I can promise is that the method above is the same one we use internally. Fragrance also works alongside ventilation and cleaning rather than instead of them, and I make no claim that scent influences a purchase decision. Made in India, and a portion of every order supports girl-child education through Nanhi Kali.
Frequently asked questions
How much fragrance do multiple scent machines use per month?
Work it out from tank size and fill interval. A SOSA Vaayu at Rs 11,999 holds 400ml, and the manufacturer's figure is that a fill lasts up to about 75 days at typical use, which is roughly 4.9 fills and 1.9 litres a year per machine, or about 160ml a month. Four machines come to about 640ml a month at that rate. Higher intensity or longer run hours shorten the interval and raise the figure, so exact consumption is confirmed on a consultation.
Is the 75 day figure a guarantee?
No, it is an upper bound at typical use. It moves with the intensity setting and the number of hours a day the machine runs. If a fill lasts 50 days on your settings, annual consumption per machine rises from roughly 1.9 litres to about 2.9 litres. Plan with a band rather than a single number and correct it after one quarter of real refill dates.
How do I turn machine count into a yearly fragrance figure?
Multiply machines by fills per year by tank size. Four Vaayu at about 4.9 fills a year is roughly 19.5 fills, and 19.5 times 400ml is about 7.8 litres a year. Do the same sum at a shorter interval for the top of your range, which for four machines is closer to 11.7 litres.
Does the Angaan use twice as much fragrance as the Vaayu?
It holds twice as much, at 800ml against 400ml, but it is also covering up to 3,000 cubic metres rather than 1000. We do not publish a days-per-fill figure for the Angaan, because it depends on the run schedule and intensity on your HVAC, so its consumption is set on a consultation rather than estimated.
Can you tell me the monthly cost in rupees?
Not honestly from a web page, because it depends on your fragrance, your intensity setting and your daily hours. What we can do is apply the method above to your actual site and give you a costed plan on a consultation, with the assumptions written next to the numbers so you can challenge them.
A band you can defend beats a number you cannot
SOSA — Fragrance Planning for multi-machine sites & procurement budgets
The SOSA Vaayu (₹11,999) holds 400ml lasting up to about 75 days at typical use, so four machines plan at roughly 640ml a month and more at higher intensity; the SOSA Angaan (₹25,999) holds 800ml for a zone up to 3,000m³. Both made in India, and a portion of every order supports girl-child education through Nanhi Kali. Send your machine count and run hours and we will confirm the volume.
Book a free scenting plan → SOSA Vaayu · ₹11,999
One more look - the two machines that do the job
Continue the read
More from SOSA
Editorial standards & sources
About this guide: Written by Sonal Sahani, ISIPCA Versailles-trained founder and perfumer at SOSA Home & Body. Product recommendations reflect the SOSA range; the planning advice applies to any brand.Facts verified 24 August 2026 against the live SOSA product pages: the SOSA Vaayu (₹11,999) is a waterless cold-air nebuliser rated to 1000m³, described by the manufacturer as approximately 2,000-3,000 sq ft, with a 400ml refillable tank lasting up to about 75 days depending on intensity and run hours, Bluetooth app and button control, 1h/4h/8h/24h timers, adjustable intensity, operation under 38dB, DC 12V/1A at 5W, auto-stop and key-lock, and CE, RoHS and SGS certification. The SOSA Angaan (₹25,999) is an HVAC nebulising diffuser rated to 3,000m³, roughly 8,000-10,000 sq ft, with an 800ml reservoir, metal body, programmable schedules and operation under 42dB. Fragrance consumption figures on this page are arithmetic from those published tank sizes and intervals; actual usage depends on settings and hours and is confirmed on a consultation. Scent enhances the ambience and perceived quality of a space; it works alongside proper ventilation and cleaning and is not a substitute for either, and SOSA makes no claim that fragrance alone influences a purchase decision. The hotel-inspired scents are SOSA's own original interpretations; SOSA is an independent brand and is not affiliated with, or endorsed by, any hotel named for reference. Coverage, fragrance usage and running cost depend on the space, settings and hours of use, and are confirmed on a consultation. Prices and availability are subject to change - see the live product pages.