★ SOSA for Multi-Project Developers
Most developers budget for three times the machines they need - here is the arithmetic that fixes it
★ ★ ★ ★ ★
★★★★★
"I walked in expecting to buy twenty-four machines for eight sites. The volume maths came back at seventeen, including two spares."
SOSA Vaayu · portfolio count
★★★★★
"The four-bedroom sample flat needed one machine, not four. That single correction paid for the spares."
SOSA Vaayu · sample flat
★★★★★
"We keep one spare unit at head office. When a machine went in for a check, the site was never without one."
SOSA Vaayu · spare unit
★★★★★
"Our flagship centre is double height, so it took an Angaan on the HVAC while the other seven sites are on Vaayu."
SOSA Angaan · flagship centre
★★★★★
"Two machines per site turned out to be the honest answer everywhere except the two largest galleries, which took three."
SOSA Vaayu · larger gallery
★★★★★
"Being able to quote a defensible number to the finance team was the whole exercise. Air volume divided by 1000, per site."
SOSA Vaayu · budgeting
★★★★★
"I walked in expecting to buy twenty-four machines for eight sites. The volume maths came back at seventeen, including two spares."
SOSA Vaayu · portfolio count
★★★★★
"The four-bedroom sample flat needed one machine, not four. That single correction paid for the spares."
SOSA Vaayu · sample flat
★★★★★
"We keep one spare unit at head office. When a machine went in for a check, the site was never without one."
SOSA Vaayu · spare unit
★★★★★
"Our flagship centre is double height, so it took an Angaan on the HVAC while the other seven sites are on Vaayu."
SOSA Angaan · flagship centre
★★★★★
"Two machines per site turned out to be the honest answer everywhere except the two largest galleries, which took three."
SOSA Vaayu · larger gallery
★★★★★
"Being able to quote a defensible number to the finance team was the whole exercise. Air volume divided by 1000, per site."
SOSA Vaayu · budgeting
★ The two machines in the count
SOSA VaayuOne per sales officeView ₹11,999
SOSA VaayuOne per sample flatView ₹11,999
SOSA AngaanOne per double-height centreView ₹25,999
✓ One Vaayu covers up to 1000m³ - about 2,000-3,000 sq ft - so a typical site is two machines ✓ Count connected air volumes, not rooms: a four-bedroom sample flat is still one machine ✓ Made in India · independent, not affiliated with any hotel · a portion funds girl-child education
Founder Diaries · Commercial Scenting Guides · Multi-Site Real Estate
Does a bigger sample flat need more machines? Usually not. A show apartment is one connected volume, not a set of rooms, so a three or four bedroom flat is still one SOSA Vaayu (₹11,999) at a moderate intensity step. Bedroom count changes the intensity you settle on, not the machine count. The number only rises when a flat is a duplex with a separately air-conditioned upper level.
Should a developer keep spare scent machines? Yes, about one spare SOSA Vaayu (₹11,999) per ten machines in service, held centrally rather than at a site. A spare costs less than a flagship sales office running unscented for three weeks, and because every site runs the same unit, the spare drops into any of them with the settings sheet applied.
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.
The number is smaller than your first estimate, and it is arithmetic rather than opinion: connected air volumes per site, multiplied by sites, plus a small float. Here is the calculation worked through for a six-site portfolio, including where it goes up and where it does not.
Quick answers — read this first
How many scent machines does a multi-project developer need? Count connected air volumes per site, then multiply. One SOSA Vaayu (₹11,999) is rated to 1000m³, about 2,000-3,000 sq ft, so a typical site is two machines: one for the sales office and one for the sample flat. Six sites is therefore twelve machines, plus about one spare per ten units on the shelf. Add a SOSA Angaan (₹25,999) only where a single volume is double height or 8,000-10,000 sq ft.Does a bigger sample flat need more machines? Usually not. A show apartment is one connected volume, not a set of rooms, so a three or four bedroom flat is still one SOSA Vaayu (₹11,999) at a moderate intensity step. Bedroom count changes the intensity you settle on, not the machine count. The number only rises when a flat is a duplex with a separately air-conditioned upper level.
Should a developer keep spare scent machines? Yes, about one spare SOSA Vaayu (₹11,999) per ten machines in service, held centrally rather than at a site. A spare costs less than a flagship sales office running unscented for three weeks, and because every site runs the same unit, the spare drops into any of them with the settings sheet applied.
The short answer
Short answer: count connected air volumes, not rooms - one SOSA Vaayu (₹11,999) covers 1000m³, about 2,000-3,000 sq ft, so a typical site is two machines (sales office plus sample flat), a six-site portfolio is about twelve, and you add roughly one spare per ten units; a double-height experience centre takes one SOSA Angaan (₹25,999) instead.
The pick: multiples of the SOSA Vaayu (₹11,999) across the portfolio, with a single SOSA Angaan (₹25,999) where one volume is genuinely double height or 8,000-10,000 sq ft.
Next step: send the site list with rough areas and ceiling heights and we will return a defensible machine count - book a free multi-site scenting plan.
In this guide
The portfolio number is a multiplication, not a negotiation. Count connected air volumes per site, multiply by the number of sites, add a small float, and note the one or two volumes that need the bigger machine instead.
The two machines you are counting - tap either
The unit you multiply
SOSA Vaayu · ₹11,999
The one exception
SOSA Angaan · ₹25,999
Get the number checked
Free multi-site scenting plan
Straight answer
How many scent machines should a developer with several live projects buy?
Work it per site, then multiply. For each site, list the spaces that share moving air and get each one's volume in cubic metres - length times width times height. One SOSA Vaayu (₹11,999) is rated to 1000m³, roughly 2,000-3,000 sq ft, so a sales office of that size is one machine, and a sample flat is one machine regardless of whether it has two bedrooms or four, because a flat is one connected volume rather than a set of rooms. That makes a standard site two machines. Six sites is twelve. Now adjust: a gallery over about 3,000 sq ft or split across two levels takes a second unit, so a portfolio with two large galleries is fourteen rather than twelve. A duplex show apartment with separately air-conditioned levels takes two. And where one volume is double height or runs to 8,000-10,000 sq ft, stop stacking small machines and put one SOSA Angaan (₹25,999) on the HVAC instead. Finally, add a float of about one spare per ten machines, held centrally, so a unit can be swapped the same day without a site going dark. On running cost, the count also sets your oil: at moderate settings each Vaayu uses roughly 480ml a quarter, so twelve machines is close to 5.8 litres, and a hard-run portfolio is closer to 9.6. A free multi-site scenting plan will check the count against your drawings, and a portion of every order supports girl-child education through Nanhi Kali.
Two machines per standard site. Six sites is twelve Vaayu, plus one spare per ten. Only a double-height volume changes the machine, and a bigger sample flat does not change the count.
The unit you are multiplying is the SOSA Vaayu - rated to 1000m³ (about 2,000-3,000 sq ft), waterless, under 38dB, with a 400ml tank running up to about 75 days, adjustable intensity and 1h/4h/8h/24h timers. Two per site covers most portfolios, and a spare on the shelf covers the rest.
See the SOSA Vaayu ₹11,999 Book a scenting plan
The per-site count
Two machines at a standard site. The third is a large gallery, not a third room.
The two machines you are counting
You are counting two machines and nothing else. The Vaayu is the unit that repeats; the Angaan appears once or twice in a whole portfolio, and only where a single volume is genuinely too tall or too large.
The unit you multiply across the portfolio
SOSA Vaayu
Rated to 1000m³ - about 2,000-3,000 sq ft. One in the sales office and one in the sample flat at a standard site. 400ml tank lasting up to about 75 days, adjustable intensity, 1h/4h/8h/24h timers, under 38dB, key-lock.
From ₹11,999
The spare - one per ten machines in service
SOSA Vaayu (float unit)
Held centrally rather than at a site, so a machine can be swapped the same day. Because every site runs the identical unit, the spare drops into any of them and takes the standard settings sheet without adjustment.
From ₹11,999
Counted once, at the flagship
SOSA Angaan
Rated to 3,000m³, about 8,000-10,000 sq ft, with an 800ml reservoir, metal body, programmable schedules and under 42dB. One of these replaces the temptation to put four Vaayu into a double-height hall.
From ₹25,999
How to get to a portfolio number you can defend
Three steps take you from a list of sites to a number you can put in front of finance without flinching.
1
Count volumes, not rooms
One machine per connected body of moving air
The mistake that inflates every first estimate is counting doors. A sales office where reception, the lounge and the model display share one air-conditioning loop is one volume and one machine. A four-bedroom show apartment on a single split system is one volume and one machine. Rooms are not the unit of measurement; connected air is. Multiply length by width by height, divide by 1000, round down, then walk to the furthest corner and check whether the air actually moves there.
Tip: if two spaces share air-conditioning, they usually share one machine.
The Vaayu covers 1000m³, about 2,000-3,000 sq ft, which is why most single volumes resolve to exactly one unit.
See SOSA Vaayu →
2
Multiply, then adjust
Sites times two, plus the handful of genuine exceptions
A standard site is two machines. Six sites is twelve. Then adjust for the real exceptions rather than the imagined ones: a gallery beyond about 3,000 sq ft or split across levels takes a second unit; a duplex show apartment with separate air-conditioning upstairs takes two; a double-height experience centre leaves the Vaayu count altogether. In a typical eight-site portfolio the adjustments add two or three machines, not eight.
A double-height hall is not four Vaayu. It is one Angaan on the HVAC, rated to 3,000m³.
See SOSA Angaan →
3
Add the float
One spare per ten machines, held centrally
Across a dozen units and three years, something will need to come off site for a check. A float of one spare per ten machines means the swap happens the same day and no sales office runs unscented for a fortnight. Hold the spares at head office rather than at the busiest site, and apply the standard settings sheet before it ships out. This is also the moment identical hardware pays for itself: one spare model fits every site you own.
Tip: keep the spare boxed at head office with the settings sheet taped to it.
Because every site runs the same Vaayu, one spare unit covers the whole portfolio rather than one site.
See SOSA Vaayu →
The SOSA principle
Nobody has ever complained that a sales office had too few scent machines. They complain that it smelled like three different rooms, which is what happens when you buy one per room.
The right question is not how many spaces you have. It is how many separately moving bodies of air.
The per-site count, and where it changes
The per-site count in one table, with the two rows that genuinely change it. Everything else is repetition, which is exactly what you want across a portfolio.
The SOSA plan
The count, site type by site type
| Site type | Machines |
|---|---|
|
Standard site: sales office plus sample flat
|
Two SOSA Vaayu (₹11,999 each). One per connected volume, identical settings. View → |
|
Sample flat of any size, two to four bedrooms
|
Still one Vaayu. Bedroom count changes the intensity step, not the machine count. View → |
|
Large gallery over about 3,000 sq ft, or split levels
|
Two Vaayu at that site, so three machines including the sample flat. View → |
|
Flagship double-height experience centre
|
One SOSA Angaan (₹25,999) on the HVAC, replacing the Vaayu count for that volume. View → |
Once you have the number, two things follow immediately. The first is settings, because twelve identical machines on twelve different intensity steps will still smell like twelve different buildings - that is covered in standardising scent machine settings across multiple sales offices. The second is oil, because the machine count is also your consumption forecast; the arithmetic is worked through in planning monthly refills across multiple project sites. If you are sizing one flagship rather than a portfolio, start from the sales gallery scenting plan instead.
Get a number you can defend in a budget meeting
SOSA Vaayu ₹11,999 covers up to 1000m³, about 2,000-3,000 sq ft. Send the site list and we will return the count, site by site.
Every over-specified portfolio I have seen was counted in doorways. Every well-specified one was counted in cubic metres.
— Sonal Sahani, SOSA
What the count buys you
Identical units across the portfolio, so a spare fits anywhere and settings transfer
The SOSA portfolio count
Two machines make up the whole count. The Vaayu repeats at every site; the Angaan is counted once, at the volume that is genuinely too tall or too large for it. Both are waterless, so there is no damp and no residue on models or veneers, and both are made in India. A portion of every order supports girl-child education through Nanhi Kali.
The SOSA portfolio count
What twelve machines across six sites actually looks like
| Machine | Best for | Why it works | Price |
|---|---|---|---|
|
SOSA Vaayu
|
Two per standard site, plus one spare per ten in service | 1000m³ (about 2,000-3,000 sq ft), 400ml tank up to about 75 days, adjustable intensity, 1h/4h/8h/24h timers, under 38dB, key-lock | ₹11,999 View → |
|
SOSA Angaan
|
Counted once, at the double-height experience centre | 3,000m³ on the building's HVAC, 800ml reservoir, metal body, programmable schedules, under 42dB | ₹25,999 View → |
A quick word on the number: it should come from air volume and nothing else. Not room count, not site prestige, not the budget line someone already wrote. If your count for one volume comes out above three Vaayu, that volume wants an Angaan instead. One honest note - fragrance works alongside ventilation and cleaning and cannot cover fresh paint, adhesive or damp at a site still in fit-out. Send drawings for a free multi-site scenting plan and we will check the arithmetic.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
The first number a developer gives me is almost always three times too big, and it is not their fault. It comes from counting rooms, because rooms are what a floor plan shows. Air is what a diffuser actually works on, and air does not respect the walls on the drawing.
So we count volumes. A Vaayu is rated to 1000m³, which is roughly 2,000 to 3,000 sq ft at a normal ceiling height, and a sales office of that size is one machine, not four. A show apartment is one machine, whether it has two bedrooms or four. That gives two machines at a standard site, which multiplies cleanly: six sites, twelve machines, one or two adjustments, one spare on the shelf. The only time I take the count out of Vaayu territory is a genuinely double-height volume, where one Angaan on the HVAC does what four small machines never will.
The honest part: buying more machines does not make a site smell better, and it certainly does not sell flats. I make no claim that fragrance influences a purchase decision. Over-specifying usually makes a space smell worse, because several machines at several intensities read as several different rooms. Scent also works alongside ventilation and cleaning rather than instead of them, and it will not cover fresh paint or adhesive. 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 many scent machines does a developer with six live projects need?
About twelve, plus a spare. A standard site is two machines: one SOSA Vaayu (Rs 11,999) in the sales office and one in the sample flat, because each is a single connected air volume and one Vaayu covers 1000 cubic metres, roughly 2,000 to 3,000 sq ft. Six sites therefore multiply to twelve, and you add roughly one spare per ten machines in service. Adjust upwards only for galleries over about 3,000 sq ft or split across levels.
Does a four-bedroom sample flat need four machines?
No. A show apartment is one connected volume, so it is one SOSA Vaayu at a moderate intensity step, placed where the air moves rather than in a bedroom. More bedrooms change the intensity you settle on and slightly change how quickly the tank empties, but they do not change the machine count. The exception is a duplex where the upper level has its own air-conditioning.
Should we keep spare machines centrally?
Yes, about one spare per ten units in service, held at head office rather than at a site. Because every site runs the same machine, one spare covers the whole portfolio, drops into any location and takes the standard settings sheet without adjustment. It is cheaper than a flagship sales office running unscented for three weeks.
When does a site need the Angaan instead of more Vaayu?
When one volume is double height, or between roughly 8,000 and 10,000 sq ft. At that point stacking small machines produces uneven pockets of scent rather than an even room. One SOSA Angaan (Rs 25,999) on the building's HVAC carries fragrance on the airflow that already exists, which is both cleaner and quieter than four units competing.
Does buying more machines make the site smell better?
Usually the opposite, and it has no bearing on sales - we make no claim that fragrance influences a purchase decision. Several machines at several intensities in one connected space read as several different rooms. One machine sized to the air reads as one considered building, which is the whole point of standardising across a portfolio.
Count the air, not the rooms
SOSA — Portfolio Machine Counts for developers with several live project sites
The SOSA Vaayu (₹11,999) covers up to 1000m³, about 2,000-3,000 sq ft, and is the unit you multiply across sites; the SOSA Angaan (₹25,999) is counted once for a double-height or 8,000-10,000 sq ft volume. Both waterless, both made in India, and a portion of every order supports girl-child education through Nanhi Kali. Send the site list and we will return the count before you commit a budget.
Book a free scenting plan → SOSA Vaayu · ₹11,999
One more look - the machines behind the number
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.