★ SOSA for Multi-Project Developers
A monthly top-up round beats waiting for a site to tell you it smells of nothing
★ ★ ★ ★ ★
★★★★★
"The round is the second Tuesday of every month. Six sites, one car, one afternoon. Nothing has run dry since we started it."
SOSA Vaayu · monthly round
★★★★★
"Logging millilitres instead of ticking a box was the change that mattered. Two months later we knew exactly what each site uses."
SOSA Vaayu · refill log
★★★★★
"Our sample flats run softer, so they take noticeably less than the sales offices at the same visit. The log shows it clearly."
SOSA Vaayu · sample flat
★★★★★
"Launch months need more, and now we plan for it instead of reacting. One extra litre against any site with a launch."
SOSA Vaayu · launch month
★★★★★
"The Angaan holds 800ml so the flagship is on a longer interval, but it still gets looked at on the same round."
SOSA Angaan · flagship centre
★★★★★
"Top up to full every visit rather than waiting for empty. Obvious in hindsight, and it removed all the guesswork."
SOSA Vaayu · top-up discipline
★★★★★
"The round is the second Tuesday of every month. Six sites, one car, one afternoon. Nothing has run dry since we started it."
SOSA Vaayu · monthly round
★★★★★
"Logging millilitres instead of ticking a box was the change that mattered. Two months later we knew exactly what each site uses."
SOSA Vaayu · refill log
★★★★★
"Our sample flats run softer, so they take noticeably less than the sales offices at the same visit. The log shows it clearly."
SOSA Vaayu · sample flat
★★★★★
"Launch months need more, and now we plan for it instead of reacting. One extra litre against any site with a launch."
SOSA Vaayu · launch month
★★★★★
"The Angaan holds 800ml so the flagship is on a longer interval, but it still gets looked at on the same round."
SOSA Angaan · flagship centre
★★★★★
"Top up to full every visit rather than waiting for empty. Obvious in hindsight, and it removed all the guesswork."
SOSA Vaayu · top-up discipline
★ The machines on the monthly round
SOSA VaayuTopped up monthly, logged in mlView ₹11,999
SOSA VaayuSample flats often need lessView ₹11,999
SOSA AngaanThe flagship, on a longer intervalView ₹25,999
✓ A 400ml tank lasts up to about 75 days, so a monthly visit is a top-up and a note, not a swap ✓ Logging millilitres rather than dates turns two rounds into a real consumption rate per site ✓ Made in India · independent, not affiliated with any hotel · a portion funds girl-child education
Founder Diaries · Commercial Scenting Guides · Multi-Site Real Estate
Should I wait until a scent machine is empty before refilling? No. Waiting for empty means a site smells of nothing for however long it takes someone to notice and report it, which on a portfolio is usually days. Top each SOSA Vaayu (₹11,999) to full at every monthly visit; because the tank is 400ml and refillable, a top-up takes a minute and the millilitres you add are the measurement you actually want.
How do I know how much fragrance each site really uses? Log the top-ups. A 400ml tank quoted at up to about 75 days is roughly 5.3ml a day at moderate intensity, but real sites vary with run hours, intensity step and footfall. Recording the millilitres added to each SOSA Vaayu (₹11,999) each month gives you the true rate within two rounds, and any machine consuming far more than its neighbours is usually running above the agreed intensity step.
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 onboard button control, 1h/4h/8h/24h timers, adjustable intensity, operation under 38dB, freestanding or wall and HVAC mounting, auto-stop and key-lock for public spaces, 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, connecting to the building's HVAC or running standalone wall-mounted or lay-flat. 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.
Refills are the part of a scenting programme that quietly decides whether it works. Get them on a fixed monthly round with a log, and the whole thing becomes predictable - including the quarterly order, which stops being a guess and becomes a sum.
Quick answers — read this first
How often should scent machines be refilled across multiple sites? Visit monthly, order quarterly. A SOSA Vaayu (₹11,999) holds 400ml and a fill lasts up to about 75 days depending on intensity and run hours, so a monthly visit is a top-up rather than a change. Top every tank to full on the same day each month, record the millilitres added per machine, and use the log to set the quarterly order. After two rounds you have a real per-site rate rather than an estimate.Should I wait until a scent machine is empty before refilling? No. Waiting for empty means a site smells of nothing for however long it takes someone to notice and report it, which on a portfolio is usually days. Top each SOSA Vaayu (₹11,999) to full at every monthly visit; because the tank is 400ml and refillable, a top-up takes a minute and the millilitres you add are the measurement you actually want.
How do I know how much fragrance each site really uses? Log the top-ups. A 400ml tank quoted at up to about 75 days is roughly 5.3ml a day at moderate intensity, but real sites vary with run hours, intensity step and footfall. Recording the millilitres added to each SOSA Vaayu (₹11,999) each month gives you the true rate within two rounds, and any machine consuming far more than its neighbours is usually running above the agreed intensity step.
The short answer
Short answer: run one top-up round a month on a fixed day, filling every SOSA Vaayu (₹11,999) to full and logging the millilitres added rather than the date; a 400ml tank lasts up to about 75 days depending on intensity and run hours, so two logged rounds give you a real per-site rate, and the quarterly order is then arithmetic - roughly 480ml per machine per quarter at moderate settings, plus a litre against any site with a launch.
The pick: the SOSA Vaayu (₹11,999) with its 400ml refillable tank at every site, plus the SOSA Angaan (₹25,999) and its 800ml reservoir at a double-height flagship, which sits on the same round at a longer interval.
Next step: send your site list and opening hours and we will lay the refill calendar out with you - book a free multi-site scenting plan.
In this guide
A 400ml tank running up to about 75 days does not need a monthly change, but it does need a monthly look. Topping up and logging the millilitres is what converts a manufacturer figure into your own numbers.
The machines on the round - tap either
The machine on the round
SOSA Vaayu · ₹11,999
The longer interval
SOSA Angaan · ₹25,999
Build the calendar with us
Free multi-site scenting plan
Straight answer
How should I schedule scent machine refills across all my project sites?
Fix the round before you fix the quantities. One person, one day a month, one route - the second Tuesday, or whatever suits your site pattern - visiting every machine in the portfolio. At each machine, top the tank to full rather than waiting for empty, and write down the millilitres you added. That last detail is the whole method: a date tells you nothing, but millilitres tell you exactly how that site is running. The SOSA Vaayu holds 400ml and a fill lasts up to about 75 days depending on intensity and daily run hours, so a monthly visit will typically find a tank somewhere around 150 to 200ml down at moderate settings, and considerably more at a site running a higher step through long days. After two rounds you have a real per-site rate, and the quarterly order becomes arithmetic: roughly 480ml per machine per quarter at moderate settings, so a two-machine site is close to a litre and a twelve-machine portfolio is around 5.8 litres, rising towards 9.6 litres where sites run hard. Then add the exceptions on purpose. A site with a launch in the window will run longer hours and draw down faster, so put an extra litre against it. A sample flat running a step below its sales office will consistently take less, and that difference should show in the log rather than being a surprise. The SOSA Angaan (₹25,999) at a flagship holds 800ml, so it is genuinely on a longer interval, but keep it on the same round so nothing is inspected only when someone complains. A free multi-site scenting plan will lay the calendar out with you, and a portion of every order supports girl-child education through Nanhi Kali.
One round a month, same day, same person. Top to full, log the millilitres, and order quarterly from the log rather than from the manufacturer's figure.
The SOSA Vaayu makes a monthly round quick: a 400ml refillable tank, waterless so a fill is oil and nothing else, and a fill life of up to about 75 days depending on intensity and run hours - which means each visit is a top-up and a note rather than a swap.
See the SOSA Vaayu ₹11,999 Book a scenting plan
The round
Every machine, every month, topped to full and logged in millilitres
The machines on the round
The round visits two machines and nothing else, and their tank sizes set the rhythm: 400ml at every ordinary site and 800ml at the flagship. Both pictures link to the product page so whoever runs the round can check the reservoir before setting the route.
The machine you visit monthly
SOSA Vaayu
400ml refillable tank with a fill lasting up to about 75 days depending on intensity and run hours, so a monthly visit typically tops up 150 to 200ml at moderate settings. Waterless, so there is nothing to drain or descale. Key-lock re-engaged before you leave.
From ₹11,999
The one that takes less - the sample flat
SOSA Vaayu (sample flat unit)
A flat running one intensity step below its sales office draws down noticeably slower, so it will take less at each visit. That difference belongs in the log, where it confirms the settings are right rather than surprising you at quarter end.
From ₹11,999
On the round, at a longer interval
SOSA Angaan
An 800ml reservoir on an HVAC nebulising diffuser rated to 3,000m³. It needs filling less often than a Vaayu, but it should still be looked at monthly so nothing at the flagship is discovered only when someone complains.
From ₹25,999
How to run a refill round that takes an afternoon
Three habits make a refill round work across six sites: a fixed date, a full top-up, and a log written in millilitres.
1
Fix the date and the route
Same day, same person, every month
A refill round that happens when someone has time does not happen. Put a recurring date in the calendar, name the person, and set the route so the whole portfolio is covered in one pass. Monthly is the right frequency even though a 400ml tank can run up to about 75 days, because the visit is not only about oil - it is when you confirm the intensity step, check the timer, re-engage the key-lock and look at whether the machine is still where it was mounted. Quarterly visits leave too much time for a site to drift unobserved.
Tip: the round is an inspection with a refill attached, not the other way round.
The Vaayu is waterless, so the visit is a top-up and a check - there is nothing to drain, clean or descale.
See SOSA Vaayu →
2
Top up to full, always
Never wait for a tank to empty
Waiting until a machine is empty means a site smells of nothing for however many days it takes someone to notice and mention it, and on a portfolio that is exactly the inconsistency the programme exists to prevent. Filling to a known level every month also makes the arithmetic clean: the amount you add is precisely what was used since the last visit. It costs nothing to top up a partly full 400ml tank, and it removes the need for anyone on site to judge when to call you.
The Angaan's 800ml reservoir is filled less often, but the same rule applies - top it up on the round rather than on a report.
See SOSA Angaan →
3
Log millilitres, then order from the log
Two rounds turn a specification into your own numbers
Write the millilitres added against each machine, with the site and the date. After two rounds you have a real consumption rate per site, which is more useful than any manufacturer figure because it already includes your run hours, your intensity step and your footfall. Order quarterly against that number rather than the 75-day headline - and treat a machine consuming far more than its neighbours as a settings question, not a supply one. Add a litre against any site with a launch in the coming quarter.
Tip: an outlier in the log is almost always an intensity step someone changed.
A Vaayu tank is 400ml, so the millilitres you add each month sit on an easy scale to record and compare.
See SOSA Vaayu →
The SOSA principle
The manufacturer's fill life tells you what a machine can do. Your refill log tells you what your sites actually do, and only one of those is worth ordering against.
Two months of writing down millilitres replaces a year of guessing.
The refill calendar, month by month
Here is the calendar in one table. The monthly rhythm never changes; only the quantities move, and the log is what moves them.
The SOSA plan
The refill calendar, and what happens at each point
| When | What happens |
|---|---|
|
Every month, on a fixed day
|
Top every SOSA Vaayu (₹11,999) to full, log the millilitres added, confirm the intensity step and timer, re-engage the key-lock. View → |
|
After the second round
|
You have a real consumption rate per site. Replace the estimate in the stock sheet with your own number. View → |
|
Every quarter
|
Order against the log. Roughly 480ml per machine at moderate settings, so about 5.8 litres for twelve machines, more if sites run hard. View → |
|
The flagship, on a longer interval
|
SOSA Angaan (₹25,999) holds 800ml, so it is topped up less often but inspected on the same monthly round. View → |
Refills answer when and by whom; how much you hold and where it sits is a separate question, worked through in managing fragrance inventory across multiple property sales offices. The other thing the round is quietly checking is settings drift, which is why it pairs with standardising scent machine settings across multiple sales offices - an outlier in the refill log is nearly always a machine running above the agreed intensity step. If you are running one project rather than a portfolio, the sales gallery scenting plan covers the single-site version.
One round a month, one order a quarter
SOSA Vaayu ₹11,999 holds 400ml and runs up to about 75 days per fill. Send your site list and we will lay out the refill calendar with you.
Nobody rings head office to say the sales office smells slightly less than it did. They just stop noticing, which is exactly why the round is on a calendar.
— Sonal Sahani, SOSA
Why the round stays short
Waterless and refillable, so there is nothing to clean, drain or descale
The SOSA refill schedule specification
The round visits two machines. The Vaayu is topped up monthly at every ordinary site; the Angaan holds twice as much and sits on a longer fill interval at the flagship. Both are waterless, so a visit is oil in and a lid closed, with nothing to drain or descale. Both are made in India, and a portion of every order supports girl-child education through Nanhi Kali.
The SOSA refill schedule specification
What gets topped up, how often, and what gets written down
| Machine | Best for | Why it works | Price |
|---|---|---|---|
|
SOSA Vaayu
|
Every sales office and sample flat, monthly on a fixed day | 400ml refillable tank, up to about 75 days per fill, typically 150 to 200ml added per monthly visit at moderate intensity and run hours | ₹11,999 View → |
|
SOSA Angaan
|
The flagship experience centre, inspected monthly and filled less often | 800ml reservoir on the building's HVAC, 3,000m³ coverage, programmable schedules, under 42dB | ₹25,999 View → |
A quick word on the log: record millilitres added, not visits completed. A tick-box round tells you somebody attended; a millilitre log tells you how each site is actually running and catches a changed intensity step before it becomes a quarter of over-consumption. One honest note - fragrance works alongside ventilation and cleaning and cannot cover fresh paint, adhesive or damp at a site still in fit-out. We will lay the calendar out on a free multi-site scenting plan.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
Scenting programmes rarely fail loudly. They fade. A tank runs low at the third project, nobody says anything because nobody is quite sure what it used to smell like, and three months later that site has quietly stopped being part of the brand.
The cure is a calendar entry. One person, one fixed day a month, every machine topped to full and the millilitres written down. A Vaayu holds 400ml and a fill lasts up to about 75 days at moderate intensity and typical run hours, so a monthly visit is a top-up of roughly 150 to 200ml and a quick check of the step, the timer and the key-lock. Two rounds later, the log has replaced my figures with your figures, and the quarterly order is arithmetic. The Angaan at a flagship holds 800ml and simply sits on a longer interval within the same round.
The honest part: a disciplined refill round keeps your sites consistent, and that is all I claim for it. It does not sell flats, and I make no claim that fragrance influences a purchase decision. Scent works alongside ventilation and cleaning rather than in place of them, and it cannot cover fresh paint, adhesive or damp - those need curing and airing first. SOSA is independent and not affiliated with any hotel, everything is made in India, and a portion of every order supports girl-child education through Nanhi Kali.
Frequently asked questions
How often should scent machines be refilled across several sites?
Visit monthly and order quarterly. A SOSA Vaayu (Rs 11,999) holds 400ml and a fill lasts up to about 75 days depending on intensity and run hours, so a monthly visit is a top-up rather than a change - typically 150 to 200ml at moderate settings. Monthly also gives you a regular moment to confirm the intensity step, the timer and the key-lock at every site.
Should we wait until a tank is empty before topping it up?
No. Waiting for empty means a site smells of nothing until someone notices and reports it, which is precisely the inconsistency the programme exists to prevent. Top every tank to full on each visit; the amount added is then an exact measure of what was used since the last round, which is what makes the quarterly order calculable.
What should the refill log record?
Millilitres added per machine, with the site and the date. A tick-box log only proves someone attended. A millilitre log tells you the real consumption rate per site within two rounds, and it flags outliers: a machine using far more than its neighbours is usually running above the agreed intensity step rather than having a fault.
How much oil should we order each quarter?
Start from about 480ml per machine per quarter at moderate settings, which is roughly 5.8 litres for twelve machines across six sites, then replace that estimate with your own log figure after two rounds. Budget closer to 9.6 litres for twelve machines if sites run at higher intensity or longer hours, and add about a litre against any site with a launch in the window.
Do sample flats need refilling as often as sales offices?
Usually less often. A show apartment runs one intensity step below its sales office, so the same 400ml tank lasts longer there and sits nearer the top of the up-to-75-day range. That difference should appear in your log as confirmation the settings are right, rather than as a surprise at quarter end.
One fixed day a month, and the guessing stops
SOSA — Monthly Refill Rounds across every project site you are selling
The SOSA Vaayu (₹11,999) holds 400ml with a fill lasting up to about 75 days depending on intensity and run hours, so a monthly top-up is quick and a quarterly order becomes arithmetic; the SOSA Angaan (₹25,999) holds 800ml at a double-height flagship. Both waterless, both made in India, and a portion of every order supports girl-child education through Nanhi Kali. Send your site list and we will lay out the calendar with you.
Book a free scenting plan → SOSA Vaayu · ₹11,999
One more look - what the round actually visits
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 onboard button control, 1h/4h/8h/24h timers, adjustable intensity, operation under 38dB, freestanding or wall and HVAC mounting, auto-stop and key-lock for public spaces, 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, connecting to the building's HVAC or running standalone wall-mounted or lay-flat. 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.