Founder Diaries · Clinics & Medical Centres · Four Branches, One Oil & the Costed Arithmetic
By Sonal Sahani · ISIPCA Versailles 13 min read Updated November 2026
What you are asking for is not a perfumery problem, and I want to be straight about that before I take any of your money. One recognisable fragrance across four branches is an administrative achievement: one oil, one setting written as a number, one zone map per site signed by somebody senior, one page of standard operating procedure, one purchase order, and one named person per branch who owns the refill. The perfume part of it takes an afternoon. The sameness part of it is the whole job, and it is the part that fails in chains. So this page is written as a specification and an arithmetic sheet rather than as an argument. It sets out a worked four-branch group with the cubic metres shown, counts the machines by volume rather than by floor plan, prices the hardware and the oil for year one and for every year after, and divides it per branch, per month and per public square foot so that a finance head can check every line of it with a calculator. What it does not contain is a single claim about what any of this does to your business. I do not know what it does to your footfall, your reviews, your patient retention or your referrals, nobody selling you a machine knows either, and a page that pretended otherwise would be worth less to you than one that simply adds up.
Quick answers — read this first
The six standardisation decisions, all free: one oil across every machine in the group, so any bottle fits any unit and a branch that runs dry borrows from the nearest one · one intensity setting, recorded as a number in the procedure and held by the key-lock · one zone map per branch drawn on the floor plan and signed by the medical director · one named owner per site, by name and not by job title · one page of procedure covering zones, setting, hours, refill cadence and the veto register · one review date ninety days out.
The worked group: four branches, 8,350 sq ft of plan between them, of which 4,330 sq ft is public and scented and 4,020 sq ft is clinical and fragrance-free. Public volume 1,229 m³.
Five Vaayu units, not four and not two, because one of the branches has two floors separated by a fire door and a door is a wall as far as fragrance is concerned.The cost, checkable: hardware 5 × ₹11,999 = ₹59,995. Oil thirty-five 300ml bottles a year at ₹1,799 = ₹62,965. Four alcohol-free reed sets for the four administrative cabins at ₹749 = ₹2,996.
Year one ₹1,25,956. Every year after ₹65,961, which is ₹16,490 a branch, ₹5,497 a month across the group, or ₹15.24 per public square foot per year. Free shipping above ₹499. No clinical claim of any kind, and clinical rooms stay fragrance-free.
The short answer
Short answer: one oil, one setting, one zone map per branch, one named owner per site, one page of procedure and one purchase order. For a worked four-branch group with 4,330 sq ft of public area and 1,229 cubic metres of scented volume, that is five
Vaayu units at Rs 11,999, thirty-five 300ml oil bottles a year at Rs 1,799, and four alcohol-free reed sets at Rs 749 for the administrative cabins.
Year one Rs 1,25,956; every year after Rs 65,961. Consistency across branches is an administrative result, not a perfumery one.
The order, and why: count the volumes before you count the branches, because machines are bought per volume a door closes and not per floor plan — one branch in this group needs two units for 1,260 sq ft of public area while a larger branch needs one for 1,450, since a fire door on a stair divides a building in two. Then fix the oil, because a single SKU is what makes four branches smell alike and what makes a stock-out solvable by a courier from the next branch. Then the setting, the zone map, the owner and the procedure, in that order, because each one protects the one before it.
The last line, costed: the
Vaayu at Rs 11,999 per unit — waterless cold-air nebulisation with no standing water tank, up to 1000 m³, a 400ml fill lasting about seventy-five days so roughly five fills a year, app control with 1h/4h/8h/24h timers, under 38 dB, auto-stop and a key-lock for public areas. A
300ml refill at Rs 1,799. The
Aangan at Rs 25,999 only where a branch has an atrium or an air-handling unit to tie into. Alcohol-free reeds from Rs 749 for an administrative cabin. Free shipping above Rs 499, and no medical, therapeutic or air-treatment claim is made for any of it.
Straight answer
What does one recognisable fragrance across four polyclinics actually look like, and what does it cost per year?
1. One oil, and this is the decision that does the work. Recognisability across branches is not achieved by choosing an interesting fragrance; it is achieved by every machine in the group running the same undiluted oil, bought as a single stock-keeping unit on a single purchase order. One SKU means any bottle fits any unit, a branch that runs dry at the wrong moment is solved by a courier from the nearest branch rather than by a fresh order, procurement models one line instead of four, and nobody at a branch has the opportunity to buy something local because the bottle ran out on a Saturday.
Choose the lightest thing you are offered rather than the most interesting, and hold it to one rule: a patient should not be able to tell you what the fragrance is, only that the place did not smell of anything unpleasant.2. One setting, written as a number, held by the key-lock. Four branches with the same oil and four different intensities are four different buildings. Record the intensity as a numeral in the standard operating procedure, set it once from the app by the facilities team, and lock the unit. The
Vaayu has a key-lock for precisely this reason, and in a group it matters more than in a single clinic: it is the mechanism that stops a branch manager turning it up at noon because the hall got busy, which is the commonest way a chain loses its consistency. Busy is a ventilation and occupancy problem, and
turning fragrance up makes it worse.
3. One zone map per branch, drawn on the floor plan and signed. Not a group policy in prose — four marked-up plans, each signed by the medical director, with the scented volumes hatched in one colour and the fragrance-free rooms in another. Scented: entrance, reception and registration, shared and departmental waiting, inter-departmental corridors, lift and stair lobbies, administration and back office, and the café corner. Fragrance-free: consultation and examination rooms, treatment and procedure rooms, day-care surgery and recovery, dressing rooms, blood- and sample-collection rooms, laboratories, pharmacy dispensing, sterile stores, imaging, oncology day-care and every paediatric clinical area.
Which departments get it and which do not sets out the reason for each entry, and the second list is longer than the first on purpose.
4. One named owner per site, by name and not by job title. “Facilities” is not an owner; Mr Barve is an owner. Each branch has one person who refills the unit, checks the setting against the written numeral at the start of each month, and signs a line.
Who should own the refill goes through this properly, and the reason it belongs in a chain page rather than a single-clinic page is that in a group the task is invisible from the head office until it has been missed four times.
5. One page of procedure and one review date. Zones, setting, hours, the refill cadence, who owns it, the veto register and a review date ninety days out. One page, the same page at all four branches, with only the zone map differing.
What belongs in a clinic's scenting procedure is the template. The veto register is the line most groups omit and the one I would insist on: any clinician at any branch can have any zone switched off without giving a reason, it is written down with a date, and the head office does not overturn it.
6. And then the arithmetic, which is the part you asked for. In the worked group below — four branches, 8,350 square feet of plan, 4,330 square feet of it public, 1,229 cubic metres of scented volume — it is five
Vaayu units at ₹11,999, thirty-five 300ml oil bottles a year at ₹1,799, and four alcohol-free reed sets at ₹749 for the four administrative cabins.
That is ₹1,25,956 in year one and ₹65,961 in every year after: ₹16,490 a branch, ₹5,497 a month across the group, ₹15.24 per public square foot per year. Fragrance here is housekeeping and presentation, it sits in the facilities budget beside housekeeping consumables rather than in marketing, and it makes no clinical claim: a diffuser does not purify, disinfect or treat anything. I am also not going to tell you what it does to your business, because I do not know.
A portion of every order supports girl-child education through Nanhi Kali.
TL;DR: one oil, one setting as a numeral, one signed zone map per branch, one named owner per site, one page of procedure, one review date. Count machines per volume a door closes, not per floor plan — the worked group needs five units for four branches. Hardware ₹59,995, oil ₹62,965 a year, reeds ₹2,996. Year one ₹1,25,956; after that ₹65,961, or ₹5,497 a month across four branches. No claim about what it does to the business.
What a four-branch group actually buys, in order
SOSA commercial scenting from ₹899
Six decisions and three line items.
The six decisions — one oil, one setting, one zone map per branch, one named owner per site, one page of procedure, one review date — are free, and they are the whole of consistency. The three line items are the hardware, the oil and the reeds, and they are the whole of the cost. Five
Vaayu units at ₹11,999, thirty-five 300ml bottles of oil a year at ₹1,799, four alcohol-free reed sets at ₹749 for the administrative cabins. ₹1,25,956 in year one, ₹65,961 a year after. The
Aangan at ₹25,999 only where a branch has an atrium or an air-handling unit. Free shipping above ₹499.
The six decisions, and all six of them are free
Everything that makes four branches smell alike is a decision rather than a purchase, which is why I put it before the arithmetic rather than after it. A group that buys five identical machines and leaves the rest to each branch gets five different buildings within a quarter: different oils because somebody's bottle ran out, different intensities because somebody turned it up in a heatwave, different zones because a dental wing decided it wanted the corridor done, and no record of any of it. A group that makes the six decisions below and then buys the machines gets one building in four places. The six are one oil, one setting written as a number, one signed zone map per branch, one named owner per site, one page of procedure, and one review date ninety days out. Not one of them costs anything and not one of them can be delegated to the branches, because the whole point of them is that they are the same everywhere. Whether a chain should have a single signature fragrance at all is the prior question and I would read it first; this page assumes you have answered yes and want the specification.
1
DECISIONS ONE AND TWO
One oil as a single SKU, and one intensity written as a numeral
One oil, bought as one stock-keeping unit, on one purchase order, for every machine in the group. The reason is logistical before it is olfactory. A single SKU means any bottle fits any unit, so a branch that runs dry on a Saturday is solved by a scooter from the branch four kilometres away rather than by an emergency purchase of whatever the local shop has; it means procurement forecasts one line rather than four; it means a new branch is a quantity change rather than a specification exercise; and it removes the single commonest way a chain drifts apart, which is a well-meaning branch manager buying a substitute. The
Vaayu and the
Aangan both run their own undiluted oil rather than the water-based
Hotel Collection bottles, and a
300ml refill at ₹1,799 is the unit I would standardise on.
Choose the lightest option you are offered. A medical building is the one commercial environment where the brief is genuinely to be unremarkable, and a fragrance that a patient can name is a fragrance running too strong.
Then one intensity, recorded as a numeral in the procedure document, set once from the app by the facilities team, and locked. Four branches with one oil and four settings are not one fragrance; they are one fragrance presented four ways, and patients who use two of your branches will notice the difference even if they cannot describe it. The key-lock on the Vaayu is the mechanism, and in a group it earns its keep: the setting is a head-office decision, the machine is a public object in a hall full of people, and the two facts need separating by hardware rather than by a memo. Write the numeral in the procedure, photograph the app screen, and put the photograph in the branch file.
2
DECISIONS THREE AND FOUR
A signed zone map for each branch, and one named person per site
Four floor plans, marked up, each signed by the medical director, and not a paragraph of group policy. Prose policy cannot survive a building: it says “public areas” and then somebody has to decide whether the corridor that leads only to the dressing rooms is public, and four branches will decide it four ways. A hatched plan decides it once. Scented in one colour: entrance, reception and registration, shared and departmental waiting, inter-departmental corridors, lift and stair lobbies, administration and back office, the café or refreshment corner, and staff rooms if the staff want them. Fragrance-free in another: consultation and examination rooms, treatment and procedure rooms, day-care surgery and recovery, dressing rooms, blood- and sample-collection rooms, diagnostic laboratories, pharmacy dispensing, sterile stores and CSSD, imaging and radiology rooms, oncology and chemotherapy day-care, every paediatric clinical area, and any room in which a patient undresses.
The full fragrance-free list with the reason for each entry is the document to put in front of your medical director, and the fact that it is longer than the scented list is the reason the scented list can be trusted. Then the owner.
One person per branch, by name, written on the procedure page: not “facilities”, not “the housekeeping team”, not “the branch manager” as a role. That person refills the unit on the cadence, checks the setting against the written numeral on the first working day of each month, confirms the key-lock is on, and signs one line. In a single clinic a vague owner produces an occasional lapse. In a group it produces an invisible one, because nobody at head office is standing in the hall to notice, and by the time a regional visit catches it the branch has been running on a different setting for two months. Give the same person the veto register: any clinician at that branch can have any zone switched off without giving a reason, it is logged with a date, and head office does not overturn it.
3
DECISIONS FIVE AND SIX, AND THE ARITHMETIC
One page, one review date, and five machines rather than four
One page of standard operating procedure, identical at all four branches, with only the zone map differing. Nine lines will do it: the zones, as a reference to the signed plan; the intensity, as a numeral; the running hours, start and stop, as clock times tied to the timer rather than to a person; the start-up sequence, which is housekeeping opening up and watering every drain trap at sixty minutes before opening, air conditioning at forty-five, diffuser at thirty, first appointment at zero; the refill cadence and the stock held on site; the named owner; the monthly check; the veto register; and the review date.
The template is here.
Then one review date, ninety days out, in the diary of whoever signed the procedure. At the review you ask four questions and none of them is about sales: has anybody turned it up, has any clinician vetoed any zone, has a refill been missed, and does the building still smell of nothing in particular at nine and at six.
And then the arithmetic, counted per volume rather than per branch, which is the part that surprises groups. The sum is floor area in square feet divided by 10.76, multiplied by ceiling height in metres, counting only the volumes a door closes. In the worked group the four branches hold 8,350 square feet of plan, of which 4,330 is public and 4,020 is clinical and comes out of the sum entirely. Public volume is 1,229 cubic metres. A single Vaayu is rated to 1000 cubic metres, so a reader doing this quickly concludes two machines — and that is wrong, because coverage does not travel between buildings or through fire doors. Branch one, 1,450 square feet of public area at 3.2 metres, is 431 cubic metres and takes one unit. Branch two, 980 square feet at 3.0 metres, is 273 cubic metres and takes one. Branch three, 640 square feet at 2.9 metres, is 173 cubic metres and takes one. Branch four is two floors with a fire door on the stair: 720 square feet at 3.0 metres on the ground, which is 201 cubic metres, and 540 square feet at 3.0 metres above, which is 151, and that is two units for 1,260 square feet while branch one needs one for 1,450.
Five machines, not four and not two. The honest sum does not always give a group fewer machines; it gives it a different distribution, and that is a better thing to discover before the purchase order than after it.
The instruction I would give a group facilities head: make the six decisions and write them down before you ask anybody for a quotation, then count the machines per volume a door closes and attach the five sums to the purchase order. A quotation written against a floor-plan area is a quotation against the wrong number.
The four-branch arithmetic sheet, with every sum shown
This is the sheet I would send a finance head, and every figure in it can be re-derived with a calculator from the two numbers in the second column. Public area means the volumes a door closes: clinical rooms are fragrance-free with their doors shut and come out of the sum entirely, which here removes 4,020 of the group's 8,350 square feet.
Print this
Four branches, five machines, and the cost per year
| Branch |
Public area × height = volume |
Machines, and why |
Oil a year |
| Branch 1 — flagship, single floor ★ |
1,450 sq ft ÷ 10.76 = 134.8 m² × 3.2 m = 431 m³ |
One Vaayu. Rated to 1000 m³, so 431 with headroom — and the 2,800 sq ft plan would have been quoted two |
7 × 300ml = ₹12,593 |
| Branch 2 — single floor |
980 sq ft ÷ 10.76 = 91.1 m² × 3.0 m = 273 m³ |
One Vaayu, one setting, one oil. Identical specification to branch 1 |
7 × 300ml = ₹12,593 |
| Branch 3 — smallest, single floor |
640 sq ft ÷ 10.76 = 59.5 m² × 2.9 m = 173 m³ |
One Vaayu, on the same setting. The sum worked at 3,000 sq ft
|
7 × 300ml = ₹12,593 |
| Branch 4, ground floor |
720 sq ft ÷ 10.76 = 66.9 m² × 3.0 m = 201 m³ |
One Vaayu. A fire door on the stair is a wall as far as fragrance is concerned |
7 × 300ml = ₹12,593 |
| Branch 4, first floor |
540 sq ft ÷ 10.76 = 50.2 m² × 3.0 m = 151 m³ |
A second Vaayu. Two units for 1,260 sq ft, while branch 1 needs one for 1,450 |
7 × 300ml = ₹12,593 |
| Four administrative cabins |
About 110 sq ft each ÷ 10.76 × 2.9 m ≈ 30 m³ each |
No machine. One alcohol-free reed diffuser per cabin, 24–72 hours to establish |
₹749 each = ₹2,996 |
| Group total |
4,330 sq ft public of 8,350 plan · 1,229 m³ scented |
5 machines × ₹11,999 = ₹59,995 one-off · 4 reed sets = ₹2,996 |
35 × ₹1,799 = ₹62,965 |
| Never |
A different fragrance per branch, a machine sized on plan area, or a unit turned up because a hall got busy |
Nobody owns this row. No clinical room at any branch, and no health claim to any patient
|
— |
Shop this guide
Five machines, one oil, and the cabins
The SOSA principle
Recognisable, across four branches, means identical. Identical is one oil, one numeral, one signed plan per site and one name per site — and all four of those are free. The machines are the easy part and the cheap part of the problem.
₹59,995 of hardware once, ₹65,961 a year after that, and six decisions that cost nothing and decide everything.
Year one, every year after, and the figure per public square foot
Before any of the arithmetic is worth running, give the group a free month, because a chain that scents four branches on top of four unresolved housekeeping problems has bought four backgrounds for four buildings that still have something of their own to say. Week one, at every branch: a mug of water down every floor gully, sluice, unused basin and unused shower sixty minutes before opening, by a named person with a sheet to sign, because a U-bend seal evaporates in two to four weeks of disuse and this is the commonest single cause of a clinic that smells. Week two: dressing-waste and sharps bins on a named collection time with lids that close, soiled linen in closed bags on a route that does not cross a public corridor, mop heads laundered nightly and dried flat. Week three: air-conditioning filters moved to a fortnightly cycle in season, the fresh-air damper confirmed open at each site, a tissue held to every toilet extract grille, and every indoor unit set to run fan-only for the last ten minutes of the day. Week four: the group facilities head walks all four branches at nine, at two and at six and writes one line each time. The full twenty-six-line checklist is the version to circulate, and in a group it has an additional use: it tells you which of your four branches has a building problem and which simply has nothing in it, and those two branches should not be buying the same thing in the same month.
Two things about the standardisation that I would put in front of a finance head before the hardware line, because they are what the money is actually buying. The first is that the single oil is the only reason this is one line in a budget rather than four. Thirty-five 300ml bottles a year on one stock-keeping unit at ₹1,799 is one purchase order, one forecast and one delivery address if you want it that way, and free shipping above ₹499 means there is no freight line to argue about. Four different oils would be four forecasts, four stock-outs a year and, within a quarter, four buildings. The second is that the owner line is what makes the recurring figure real. A 400ml fill lasting about seventy-five days means roughly five fills a year per machine, which is five occasions per machine on which a named person has to do something, and twenty-five occasions a year across five machines. If nobody is named, the first missed fill is in month four and nobody notices until a regional visit. This is also where I would rule out the water-based machines for public clinical property and say why. The ultrasonic Sukoon at ₹1,899, Boond at ₹899 and Megh at ₹3,499 are cheap enough to tempt a group into buying twenty of them, and they hold standing water and add 30 to 50 millilitres of water an hour to the air. A tank in a building open twelve hours a day needs emptying, rinsing and drying daily by a named person, and multiplying that obligation by twenty across four branches is how a group ends up with twenty tanks nobody dries. They stay honest for one administrative cabin each, and even there a ₹749 reed set and no tank at all is the better answer.
And then the full arithmetic, in the form I would send it. Hardware: five Vaayu units at ₹11,999, which is ₹59,995, one-off, capital or expensed as your accounting policy prefers. Oil: a 400ml fill lasts about seventy-five days, so 365 divided by 75 is just under five fills a year; five fills at 400ml is 2,000ml per machine per year; at 300ml a bottle that is six and two-thirds bottles, so buy seven per machine and treat the seventh as your buffer. Seven bottles × five machines is thirty-five bottles, and thirty-five × ₹1,799 is ₹62,965 a year. Reeds: four alcohol-free sets at ₹749 for the four administrative cabins, which is ₹2,996, replaced rather than topped up, annually. Year one is ₹59,995 + ₹62,965 + ₹2,996 = ₹1,25,956. Every year after is ₹62,965 + ₹2,996 = ₹65,961. Divided four ways that is ₹16,490 a branch a year; across the group it is ₹5,497 a month; and against 4,330 square feet of public area it is ₹15.24 per public square foot per year, or ₹29.09 in year one. Budget it in facilities, alongside housekeeping consumables, rather than in marketing, because that is what it is and the budget-line question goes through why that classification ends an internal argument rather than starting one. The Aangan at ₹25,999 enters this conversation only if one of your branches has a double-height atrium or an air-handling unit worth tying into, in which case it replaces two or three standalone units on that site; proposing it for a 273 cubic metre hall is overselling and the comparison page says so. What I am not going to put in this arithmetic is a return line, because there is not one I can defend. I do not know what a consistent fragrance does to your footfall, your reviews, your retention or your referrals; I have never seen a number I would stand behind; and if a supplier offers your group one, ask for it in writing on their letterhead addressed to your medical director and watch what happens. What you are buying, for ₹65,961 a year, is four buildings that smell the same as each other and of nothing in particular. That is housekeeping and presentation, and it is enough.
Four branches smelling alike is not a perfumery achievement, it is an administrative one. One oil, one numeral, one signed plan and one name per site — and if you cannot hold those four, a better fragrance will not save you.
— Sonal Sahani, SOSA
The SOSA edit
The six decisions and the three line items in one table for a group budget meeting. Five of the six rows are free, and the only row with money in it is the last.
The SOSA edit
Five free decisions, and one costed line
| Tier |
What is in it |
Who owns it |
Cost |
| 1. One oil, one SKU ★ |
A single undiluted oil for every machine in the group, bought on one purchase order as a 300ml refill. Any bottle fits any unit, so a stock-out is a scooter rather than an order |
Group procurement, one forecast line |
₹0 to decide |
| 2. One setting, as a numeral |
The intensity written as a number in the procedure, set once from the app by the facilities team, the key-lock engaged, the app screen photographed and filed |
Group facilities. Not the branch manager |
₹0 |
| 3. One signed zone map per branch |
Four marked-up floor plans, scented volumes in one colour and fragrance-free rooms in another, each signed. The fragrance-free list
|
The medical director, by signature |
₹0 |
| 4. One named owner per site |
A person, not a job title. Refills on cadence, checks the numeral on the first working day of each month, confirms the key-lock, signs a line. Why it must be a name
|
Named on the procedure page at each branch |
₹0 |
| 5. One page of procedure, one review date |
Zones, setting, hours, start-up sequence, refill cadence, owner, monthly check, veto register, review at ninety days. The template
|
Whoever signed it, with the review in their diary |
₹0 |
| 6. The hardware and the oil |
Five Vaayu units, thirty-five 300ml oil bottles a year, four alcohol-free reed sets for the administrative cabins. Free shipping above ₹499 |
Group procurement, one purchase order |
₹1,25,956 year one · ₹65,961 after |
Honest notes for buyers: every figure on this page is arithmetic from a worked example and should be re-derived against your own areas, ceiling heights and opening hours before it goes into a budget. This page makes no claim of any kind about what scenting does to a clinic's footfall, patient retention, reviews, referrals or revenue, because no such claim can be substantiated and none is offered here. On fragrance itself, fragrance in a medical facility is housekeeping and presentation, never treatment. Nothing here claims that a fragrance reduces anxiety, aids recovery, improves sleep, cleans or disinfects air, or has any clinical effect whatsoever, because it does not and a diffuser is not an air purifier. Scenting belongs to the entrance, reception, shared waiting areas, inter-departmental corridors and administrative rooms. Consultation and examination rooms, treatment and procedure rooms, day-care surgery, dressing rooms, blood- and sample-collection rooms, laboratories, pharmacy dispensing, sterile stores, imaging rooms, oncology day-care and paediatric clinical areas should be left fragrance-free. A persistent smell is information about a dry drain trap, a bin, a soiled-linen route or an air-conditioning drain pan: find it and fix it rather than covering it. On the machines: the
Vaayu at ₹11,999 is waterless cold-air nebulisation with no standing water tank, covering up to 1000m³ or roughly 2,000–3,000 sq ft, with a 400ml tank lasting about 75 days, app control, 1h/4h/8h/24h timers, under-38dB running, auto-stop and a key-lock for public areas. The
Aangan at ₹25,999 covers up to 3,000m³ and connects to HVAC for a whole floor or an atrium. The ultrasonic
Sukoon,
Boond and
Megh are water-based, hold standing water and add 30–50 ml of water an hour to the air, which suits a single administrative cabin with a named person emptying and drying the tank daily and is unsuitable for public clinical property. An alcohol-free
reed diffuser needs 24–72 hours to establish and suits a small lobby rather than a large waiting hall. Candles are not appropriate in a healthcare facility because an open flame is a fire-safety matter. SOSA does not make a room spray. The Hotel Collection scents are SOSA's own interpretations inspired by the world's finest hotels; SOSA is an independent Indian fragrance house, not affiliated with or endorsed by any hotel brand. A portion of every order supports girl-child education through Nanhi Kali.
Five units, one oil, one setting
SOSA Vaayu ₹11,999
The unit a group standardises on, and the reason is operational rather than clinical. Waterless cold-air nebulisation means no standing water tank at any of your four branches, which removes twenty-five occasions a year on which somebody would otherwise have to empty, rinse and dry a reservoir in a building open twelve hours a day. App control and 1h/4h/8h/24h timers mean the facilities team sets the schedule once for all five units and the branch never touches it. The key-lock means the setting survives a heatwave and a busy Saturday. Up to 1000 cubic metres, a 400ml fill lasting about seventy-five days, under 38 dB, auto-stop, four hotel-inspired scents included. Public areas only, clinical rooms fragrance-free.
A note from Sonal
The first chain I supplied properly was four polyclinics in Pune, and I made exactly one mistake with them, which was to spend a long afternoon on the fragrance and about ten minutes on the paperwork. Within four months one branch was running a bottle somebody had bought locally because the stock ran out on a Saturday, one had been turned up two steps during a May heatwave and left there, and one had quietly extended into the corridor outside its dressing rooms because the dental lead thought it would help, which is precisely the room where it does not belong. The fourth branch was perfect, and the only difference was that its manager had written the setting on a card and taped it inside the cupboard door. That card is the reason this page is a specification rather than an essay, and the reason the six decisions come before the arithmetic.
The question I now ask a group before I quote is not how many square feet they have, it is who, by name, will refill the machine at the branch furthest from the head office. If the answer is a job title, I say so and we stop, because a chain with an unnamed owner does not get four buildings that smell alike; it gets four buildings that smelled alike in the first month. The other thing I say, usually earlier than the customer expects, is that I have nothing to offer on what this does to the business. It is a fair question from somebody signing for ₹1,25,956 and I would rather answer it honestly than well: I do not know, I have not seen a number I would defend in front of a medical director, and the only claim I will make is that four buildings will smell the same as each other and of nothing in particular. Groups that find that answer disappointing usually go elsewhere, and groups that find it reassuring tend to stay.
I would rather supply five machines into a group that has written its six decisions down than twenty into one that has not, because the second group writes to me in month five and the problem is never the machine. Everything is made and supported from Pune, and a part of every order funds girl-child education through Nanhi Kali. You get a space that smells like somewhere looked after; a girl gets a classroom. That equation has always felt right to me.
Frequently asked questions
How do you get four polyclinics to smell the same?
With six decisions, all of which are free and none of which can be left to the branches: one oil bought as a single stock-keeping unit on one purchase order, one intensity recorded as a numeral and held by the machine's key-lock, one zone map per branch drawn on the floor plan and signed by the medical director, one named person per site who owns the refill, one identical page of procedure, and one review date ninety days out. The machines are the easy part.
How many diffusers does a four-branch group need?
It is counted per volume that a door closes, not per branch and not per floor plan. In the worked group on this page, four branches hold 4,330 square feet of public area and 1,229 cubic metres of scented volume, and that needs five units rather than four or two, because one branch has two floors separated by a fire door and coverage does not travel through a door or between buildings. Divide each public area by 10.76, multiply by the ceiling height, and count the volumes.
What does scenting four polyclinics cost per year?
In the worked group: five machines at eleven thousand nine hundred and ninety-nine rupees each as a one-off, thirty-five 300ml oil bottles a year, and four alcohol-free reed sets for the administrative cabins. That is about one lakh twenty-six thousand rupees in year one and about sixty-six thousand in every year after, which divides to roughly sixteen and a half thousand per branch per year, about five and a half thousand a month across the group, or a little over fifteen rupees per public square foot per year.
Will a consistent fragrance across branches improve our patient numbers or reviews?
I do not know, and I will not say otherwise. There is no figure I would be willing to put in writing in front of your medical director, and a supplier who offers your group one should be asked for it on their letterhead, addressed by name to that medical director, with the evidence appended. What a single oil and a single setting across four branches does produce is four buildings that smell the same as each other and of nothing in particular, which is housekeeping and presentation and nothing more than that.
Which budget line should group scenting sit in?
Facilities, alongside housekeeping consumables, rather than marketing or patient experience. It is presentation in the same category as the seating, the signage and whether the lift lobby light works, and classifying it that way tends to end an internal argument rather than start one. It also keeps the language right: a facilities consumable does not need a benefit attached to it, which removes any temptation to describe the fragrance as doing something to a patient.
Six decisions, then one purchase order
One oil, one numeral, one signed plan per branch — and then count the volumes, not the floor plans
The Vaayu is ₹11,999 a unit: waterless cold-air nebulisation with no standing water tank, up to 1000 m³ or roughly 2,000–3,000 sq ft, a 400ml tank lasting about seventy-five days, Bluetooth app control with 1h/4h/8h/24h timers, under 38 dB, auto-stop and a key-lock for public areas, supplied with four hotel-inspired fragrances. A 300ml refill is ₹1,799. The Aangan is ₹25,999 for 8,000–10,000 sq ft or an atrium, and alcohol-free reeds from ₹749 suit an administrative cabin. Free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
See the Vaayu · ₹11,999 All commercial scenting
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Product facts used in this guide. SOSA Vaayu Rs 11,999: waterless cold-air nebulising diffuser, no water reservoir, coverage up to 1000m3 (approximately 2,000-3,000 sq ft), 400ml refillable tank lasting up to about 75 days per fill, Bluetooth app plus onboard control, 1h/4h/8h/24h timer scheduling, adjustable intensity, under 38 dB, DC 12V/1A at 5W, 165 x 80.5 x 215 mm and 0.9 kg, freestanding or wall or HVAC mounted, auto-stop and key-lock, CE, RoHS and SGS certified, supplied with four hotel-inspired fragrances. SOSA Aangan Rs 25,999: HVAC-connected or standalone commercial nebulising diffuser, coverage up to 3,000m3 (roughly 8,000-10,000 sq ft), 800ml reservoir, metal body, programmable schedules, under 42 dB. Ultrasonic machines are water-based, hold standing water and consume 30-50 ml of water an hour: Sukoon Rs 1,899 (500ml, 270-320 sq ft, 16-18 hours on low, three 15ml Hotel Collection scents included), Boond Rs 899 (300ml), Megh Rs 3,499 (6 litres). Hotel Collection water-based fragrance 15ml Rs 299, 100ml Rs 999, 300ml Rs 1,799. Alcohol-free reed diffusers from Rs 749, requiring 24-72 hours to reach their working level. Free shipping above Rs 499. Coverage arithmetic: cubic metres equal floor area in square feet divided by 10.76 and multiplied by ceiling height in metres, counting only the volumes that are actually scented. This guide makes no medical, therapeutic or clinical claim of any kind for fragrance: a diffuser does not purify, disinfect or clean air, and does not treat, calm or affect any patient or condition. Fragrance is housekeeping and presentation. Clinical areas should be left fragrance-free, and a persistent odour should be traced to its source and corrected rather than covered. SOSA is not affiliated with or endorsed by any hotel brand. Prices subject to change - see the live product pages.
