Take the policy first, because it is short and it is the same document whether you run cataract lists, endoscopy, cosmetic surgery, orthopaedics or ENT. The public half of the building - entrance, reception, billing, consultation waiting and the attendant lounge - is the only place anything is ever introduced. The clinical half - pre-operative areas, procedure and operating rooms, post-procedure and post-anaesthesia recovery, sterile and decontamination areas, clinical and drug storage and clinical waste - gets nothing, not a lower setting, nothing. The boundary between them sits at the last real door: the last door that stays shut all day and genuinely ends one connected body of air. Fragrance adds scent and never removes odour, so no smell problem anywhere in the building is ever solved by adding one. And the decision belongs to the facility's own clinical leadership, infection-control policy and facilities engineering, whose answer overrides every recommendation from me, including the answer that nothing happens at all. Five clauses. They do not have a cataract version and a knee version.
Now the part that genuinely does differ, and differs enough that two facilities running the identical policy will end up with completely different installations. Specialities have different layouts, so the last real door sits in a different place. They have different dwell times, so the room the level is set for is a different room. They have different escort ratios, so the number of people in the public half per case on the list varies by a factor of three. And they have different routes, because some specialities are built around one public journey and others around four. Change those four inputs and the same five clauses produce a plan with one machine, or three, or none.
So the useful way to answer the question in the title is this: if somebody proposes a different policy for a speciality, push back, because what they almost always mean is a weaker one. If somebody proposes a different map and a different number for a speciality, they are right, and this page is about how to draw it.
Should a multi-speciality day-care building have one fragrance rule or several? One rule and one register, with a per-speciality map underneath it. Where several specialities share a front of house, the fragrance-free zone list is the union of every speciality's list rather than the average of them, and the level is set by the most conservative clinical lead in the building rather than by a vote. That sounds restrictive and in practice it is simplifying: one document, one register held consistently, and a drawing per floor showing exactly which named rooms get nothing.
What actually differs between specialities in practice? Four things. Layout: in ENT the consulting and examination rooms are often just off the front corridor, so the last real door is much nearer the entrance than in orthopaedics. Dwell: an orthopaedic attendant may sit five hours while a cataract escort sits forty minutes. Escort ratio: a high-throughput ophthalmic list can put two or three people in the lobby per case. Routes: a discreet plastic-surgery facility may have three or four separate public journeys, each its own volume with its own decision.
Identical in every speciality, without exception. One: only the public half is ever scented - entrance, reception, billing, consultation waiting, the patient lounge and the attendant or family waiting area. Two: the clinical half gets nothing at all, and "nothing" means nothing rather than a subtler register or a lower number - pre-operative areas, procedure and operating rooms, post-procedure and post-anaesthesia recovery, sterile and decontamination areas, clinical and drug storage and clinical waste. Three: the boundary is physical rather than notional, and it sits at the last real door - a closed door ends one connected body of air and begins another, and that is the mechanism that makes the arrangement deliverable rather than aspirational. Four: fragrance adds scent and never removes odour, so source first, then ventilation, then cleaning, then scent, in that order, in every speciality. Five: the facility's own clinical leadership, infection-control policy and facilities engineering decide what may be introduced at all, and their decision overrides everything on this page in both directions.
Different in every speciality, predictably. One: where the last real door is. In ENT the consulting and examination rooms are frequently a few metres from the waiting chairs, so the boundary can sit at the wall behind reception; in orthopaedics or ophthalmics there is usually a lounge, a corridor and then the doors, so the public volume is much larger. Two: which room the level is set for. In a high-throughput cataract list nobody sits for very long, so the reference person is a forty-minute escort; in orthopaedics the post-procedure observation is often the longest in a day-surgery building and the reference person is an attendant at hour five. Three: how many people are in the public half. Ophthalmic and cataract work puts an escort beside almost every patient, sometimes two, so the lobby holds far more bodies per case than a speciality where most patients arrive alone. Four: how many public routes exist. A discreet plastic-surgery facility may have a main entrance, a second entrance, private consultation suites and a separate discharge route, and each of those is its own volume with its own decision; a single-corridor endoscopy unit has one.
The test for whether something belongs in the first column or the second is simple and worth applying whenever somebody proposes a "speciality-specific" rule. Ask: does this change what may be introduced into the air of a clinical area? If it does, it is not a map question, it is a policy question, and the answer is no. If it only changes where a machine stands, how many there are, what number it runs at and which named rooms appear on the list, it is a map question and it should be answered locally, by walking the plan.
And one commercial point that people find counter-intuitive. Running one register across every speciality in a group is not a compromise, it is the source of the signature. Consistency is what makes a house character; uniqueness does not. A patient who has a cataract done at your Pune site and comes back two years later for a hand procedure at your Mumbai site should meet the same air, which is a brand asset you get for free and lose the moment a local manager decides their speciality needs its own smell. A portion of every SOSA order supports girl-child education through Nanhi Kali.
The reason this distinction is worth a whole page is that "speciality-specific policy" is how a good standard quietly gets dismantled. It very rarely arrives as an argument for doing something reckless. It arrives as a reasonable-sounding request: this department's patients are only here for twenty minutes, so surely the corridor is fine; this unit does not have a theatre as such, so surely the rule is lighter; our clinicians here are relaxed about it, so surely we can run a bit higher. Each of those is a request to move an item from the second column to the first, and each one, granted, makes the standard a little less true everywhere.
The counter is not stubbornness. It is to say yes to the real question underneath. Almost every time somebody asks for a different policy, what they actually want is a different map - a machine somewhere else, a different number, a room added to or removed from the scented list - and all of that is available immediately and without touching the standard. Give them the map change, keep the five clauses, and the conversation ends happily.
The one situation where a speciality genuinely narrows the policy rather than the map is when its own clinicians decide it should. That is not an exception to the rule that the policy is fixed, because the rule already says the clinical leadership decides. If the ENT lead in a multi-speciality building says they would rather their floor were neutral, the floor is neutral. If a surgical director says the whole building should be, the whole building is. A policy that can only be tightened by clinicians and never loosened by administrators is exactly the shape you want.
One more practical note about who sets the level. In a shared building, the level is not a democratic outcome and it is not the average of departmental preferences. Set it to satisfy the most conservative clinical lead who has a view, because the cost of being a notch too quiet is that nobody notices the fragrance, and the cost of being a notch too loud is a conversation with a surgeon you will lose. And your staff - front desk, billing, housekeeping - sit in that air eight to ten hours a day across every speciality in the building, which makes them the most exposed people in it. If any of them mentions the fragrance, that is a recalibration signal rather than a tolerance problem, and "off" must be a state anybody on the desk can set for a named unit without finding a manager.
What never changes, what always changes, and how to write the difference down
Three things are worth working through here: the clauses that never move, the four inputs that always do, and the document structure that keeps those two things apart over years and staff changes.
It helps to see the arithmetic first, because it makes the "same policy, different map" claim concrete rather than rhetorical. Take four facilities running identical rules.
A high-throughput ophthalmic unit with a 1,500 sq ft waiting hall at a 12 ft ceiling: 1,500 x 12 = 18,000 cubic feet, and 18,000 divided by 35.3 is about 510 cubic metres, holding a large number of patients each with an escort, most of them there for under an hour. An orthopaedic centre with a 700 sq ft lounge at 12 ft: 8,400 cubic feet, about 238 cubic metres, holding fewer people for far longer, with wider routes and space beside chairs for frames. A discreet plastic-surgery facility with a 500 sq ft lobby at 12 ft - 6,000 cubic feet, about 170 cubic metres - plus a 150 sq ft private consultation suite at 9 ft, which is 1,350 cubic feet, about 38 cubic metres behind a closed door, and a separate discharge corridor. An ENT centre with a 350 sq ft reception at 12 ft: 4,200 cubic feet, about 119 cubic metres, with consulting rooms opening more or less straight off it.
Same five clauses. Four completely different answers: one machine running gently in a large hall; one wall-mounted unit set for an attendant at hour five; one lobby unit plus two deliberate blanks; and, quite possibly, nothing at all. Nobody changed the policy. The geometry, the dwell, the escort ratio and the route count changed, and those are the four inputs.
What does not belong in this conversation at all: any suggestion that a speciality with "less invasive" work can carry fragrance closer to its clinical areas, any suggestion that a unit without a full theatre is outside the boundary, and any suggestion that a lower setting is an acceptable substitute for nothing. Those are not map adjustments, they are policy erosions, and the answer is no in every speciality. And nothing here is clinical, infection-control or engineering advice: no SOSA product is a medical device, a clinical product, an infection-control product or an air-treatment device, and none is validated for clinical use.
One framing that helps this land with a mixed audience of clinicians and administrators. The policy is a standard, written once, owned by clinical leadership, and short enough to fit on one page. The map is a drawing, redrawn per site and per speciality, owned by facilities, with named rooms on it. The level is a number, set locally, written on a card taped to the machine, with one named person allowed to change it. Three artefacts, three owners, and almost every dispute I have seen in this category is somebody trying to solve a problem with the wrong one of the three.
One. Only the public half is ever scented. Entrance and lobby, reception and billing, consultation waiting, the patient lounge and the attendant or family waiting area. That is the list, in every speciality, at every site. It does not get extended into a corridor because the corridor is where the socket is, and it does not get extended into a treatment room because the room looked bare.
Two. The clinical half gets nothing. Pre-operative areas, procedure and operating rooms, post-procedure and post-anaesthesia recovery, sterile and decontamination areas, clinical and drug storage and clinical waste. Nothing means nothing: not a lower setting, not a subtler register, not a reed diffuser somebody brought from home, not a plug-in bought locally by a well-meaning supervisor. This is the clause that most often gets tested, and the reason to state it in those exact words is that "minimal" and "very light" are interpretable and "nothing" is not.
Three. The boundary sits at the last real door. A closed door ends one connected body of air and begins another, and a facility's air handling can be arranged so that the public side and the clinical side are not one volume. That physical fact is what makes this arrangement deliverable rather than a promise. "Real" is doing work in that sentence: a door propped open for half the working day is not a boundary, a curtain is not a boundary, and a corridor with a door at each end that everybody walks through is one volume rather than two. Where you are unsure whether two spaces are really separate in air terms - a door undercut, a shared return grille, a corridor acting as a plenum, a common air handler serving rooms that look separate on the drawing - that is an engineering question answered by your own HVAC consultant rather than by a drawing or a page. And a scenting unit is never ducted into air handling that serves a clinical zone, in any speciality.
Four. Fragrance adds scent and never removes odour. No deodorising, neutralising, absorbing, masking-away, sanitising or purifying claim, in any speciality, ever. A smell problem is a source problem with an operational answer: source first, then ventilation, then cleaning and laundering, then scent. This clause belongs in the standard rather than in a supplier's small print because it is the clause that prevents the single most expensive mistake in healthcare scenting, which is buying a machine to solve a waste-handling or housekeeping problem and ending up with two smells instead of one.
Five. Clinical leadership decides and can always tighten. What may be introduced into the air of a building that contains a surgical or procedural zone is governed by the operator's own clinical leadership, infection-control policy and facilities engineering. They can extend the fragrance-free list, narrow the scented list, lower a level or rule the whole idea out, at any site, for any speciality, without giving a reason. Administration cannot go the other way. That asymmetry is the single most important line in the document, because it is what makes the standard trustworthy to the people who have to live inside it.
Notice what is not in those five clauses: no register, no machine, no number, no room dimensions, no speciality names. All of that is map, and map goes in a different document. Keeping the standard free of specifics is what lets it survive a refit, a new site, a change of supplier and a change of director.
Geometry: where the last real door sits. This is the biggest single difference between specialities and it is purely architectural. In ENT, examination and consulting rooms with instruments in them are often directly off the front corridor, so the boundary can be the wall behind reception and the public volume shrinks accordingly. In ophthalmic and cataract work there is frequently a large, genuinely separate waiting hall with a clear set of doors between it and everything clinical, which is close to the best case in this bank. In gastroenterology and endoscopy the pathway usually starts early, with a long preparation period before the procedure, and the honest work in those buildings is waste handling and ventilation rather than fragrance. In plastic surgery there may be several boundaries because there are several routes. In orthopaedics the front of house is usually generous because circulation demands it, and the doors are usually well back. Walk the plan and mark the doors that actually stay shut. That single exercise tells you the volume you are allowed to work in, and it is the first thing that differs.
Dwell: which person the level is set for. The rule everywhere is "set for the longest sitter", and the longest sitter is a different person in every speciality. Orthopaedic day cases frequently carry the longest post-procedure observation in a day-surgery building, so the reference human being is an attendant at hour five and the correct level is correspondingly low. A high-throughput cataract list turns the hall over quickly, so the reference person may be an escort at forty minutes. A plastic-surgery consultation patient may be in a private suite for twenty-five minutes but will be back four more times over six months, which makes repetition rather than duration the thing to design for. Endoscopy involves a long preparation window that mostly does not happen in your lobby. Same rule, four different numbers.
Escort ratio: how many bodies are in the public half per case. This one is routinely ignored and it changes the room more than people expect. Ophthalmic and cataract work brings an escort with nearly every patient, often an adult child, and a twenty-case morning list can therefore put fifty or sixty people through a waiting hall before lunch. Orthopaedic patients are usually accompanied too, and the party is often two or three including somebody carrying bags. Other specialities see more patients arriving alone. A room holding sixty people is a different olfactory environment from the same room holding fifteen - more competing personal fragrance, more air disturbance, more door cycles - and the practical consequence is that a high-escort speciality needs a lower ambient level rather than a higher one, because it already has more going on in the air and because a loud register meeting thirty personal fragrances in the middle of a hall belongs to nobody.
Routes: how many separate public journeys the building has. Most specialities have one: in the front, wait, be called, come back, leave. A discreet facility - plastic and cosmetic surgery being the obvious case - may have three or four, with a second entrance, private consultation suites, a dedicated lift lobby and a discharge route that avoids the waiting area. Each of those is a separate connected body of air, which means each is a separate decision rather than an extension of the lobby's, and the default entry for each should be "nothing" until somebody argues otherwise. A building with four routes does not need four machines. It usually needs one machine and three deliberate blanks.
Feed those four inputs into the same five clauses and you get genuinely different installations from an unchanged rule. That is exactly what "the application differs but the policy does not" means, and it is worth saying it in those words to anybody in your organisation who thinks they are asking for an exception when they are actually asking for a redraw.
The standard. One page, five clauses, owned by clinical leadership, identical across every speciality and every site in the group. No registers, no machines, no numbers. It is referenced by the fit-out brief, it is referenced by the housekeeping SOP, and it is the document a new facility manager reads on their first week. Because it contains no specifics it needs almost no maintenance, which is the point.
The map. A drawing per site, and where a site runs more than one speciality on more than one floor, a drawing per floor. On it: the scented rooms, shaded; the fragrance-free rooms, listed by name rather than by category; the position of each unit; and the doors that are being relied on as boundaries, marked as such. Naming the fragrance-free rooms individually is the single most useful piece of documentation in this whole category, because a principle in somebody's head gets reinterpreted and a list of named rooms on a drawing does not. It is also what stops the classic month-seven failure, where a well-meaning new housekeeping supervisor puts a plug-in in a recovery bay because it looked bare.
The card. On each machine: the register, the unit, its position, the setting number, the date it was set, and one named person allowed to change it. This is how you match the perceived level across specialities and sites rather than the setting number, which is the right target and the one people get wrong. Two lobbies at the same number will not read the same if one is 170 cubic metres with a side door and the other is 510 cubic metres with automatic doors on a main road, so each site is calibrated separately and then written down. An over-scented building is almost never a decision; it is the residue of six small unrecorded adjustments.
And now the shared-building question, which is where this page earns its title. When several specialities share one front of house - very common in a private day-care hospital with cataract lists on one floor, orthopaedic day cases on another and an ENT consultant on a third - two rules settle everything.
The fragrance-free zone list is the union, not the average. Every room that any speciality's clinical lead wants excluded is excluded, for everybody. You do not negotiate one department's exclusion down because another department is comfortable with it. Unions are simple to administer and averages are not, and the cost of an extra excluded room is approximately nothing.
The level is set by the most conservative clinical lead who has a view. Not by a vote, not by the majority, not by the department that paid for the machine. The cost of being one notch too quiet is that fewer people notice the fragrance; the cost of being one notch too loud is a conversation with a surgeon that you will lose, and should lose. If the ENT lead in a shared building would rather their floor were neutral, their floor is neutral - and notice that this is not an exception to the standard, because clause five already says clinicians can always tighten.
The review. Put a date on the map - three months after installation, then annually, and again after any refit, any change of air handling and any change of clinical leadership. Ask the same question each time: is this still what you want? Facilities that do this find the conversation takes four minutes. Facilities that do not find it takes an hour and starts badly, because the first time anybody revisits the subject is when somebody has complained.
- Write one standard of five clauses with no register, machine or number in it.
- Draw a separate zone map per site and per floor, naming every excluded room.
- Match the perceived level at each site, not the setting number, and card each machine.
- In a shared building take the union of exclusions and the most conservative level.
One register across the group, and a different map and level at every door
On the register, the cross-speciality answer is simpler than the map question and it runs the other way: use one, everywhere. There are seven in the water-based Hotel Collection, each SOSA's own hotel-inspired interpretation, and SOSA is independent and not affiliated with, endorsed by or connected to any hotel brand.
The case for one register across every speciality in a group is not aesthetic tidiness, it is that consistency is what makes a signature. A patient who has a cataract procedure at your first site and comes back three years later for a hand procedure at your third should meet the same air. That recall is free, it is the only part of this whole exercise that compounds, and it is destroyed the moment each department chooses its own character. Departmental registers also create a genuinely unpleasant practical problem in a shared building: two registers meeting in a shared lift lobby or a stair core make a third smell that belongs to nobody and reads worse than either.
Which one, then, given it has to work in every speciality you run? Quiet Luxury - white tea, bergamot and cedar - is the group answer. Hushed, polished, cool and unsweet, neutral across a very mixed public, and it works equally well at a high-throughput cataract hall, an orthopaedic lounge and a consultation-led cosmetic front of house. If you have no strong view, choose this and stop thinking about it.
White Tea Serenity - white tea, aloe and cedar - is the alternative group answer where the estate is consistently pale, glazed and minimal. It reads as clean rather than as scented, which is the distinction every speciality in a healthcare building is trying to make, and it is the hardest register in the collection to over-notice, which matters in the specialities with the longest dwell.
Forest Suite - cedarwood, vetiver and green leaves - is the group answer for an estate built around timber, stone, concrete or planting. It reads as structural rather than decorative, so mixed publics receive it as part of the building.
Tea Garden - jasmine, green tea and white tea - is the least risky floral, warmer than the white-tea registers and wanting a lower setting; it suits a softer, more residential estate and is the one to be most careful with in the smallest rooms. Warm Welcome - citrus, floral and sandalwood - is a genuine threshold register for a family-facing group and must be run at a fraction of hotel level. Old-World Glamour - amber, violet and woods - is plush and evening-elegant and the wrong shape for a clinical building in any speciality, because plush reads as covering. Lobby Bar - citrus, pepper and amber - is bold, playful and after-dark and has no home in a day-care hospital at all.
Those seven are the water-based Hotel Collection for the SOSA ultrasonics. The Vaayu and the ducted machines run four hotel-inspired waterless blends instead, supplied with the machine as one of three bundle choices - two different fragrance systems rather than the same bottle in two sizes, which is worth knowing before a group standardises on a register at one site and a machine type at another. And I will not rank the seven on measured throw or longevity: SOSA does not publish that comparison, and volume, ceiling height, ventilation, door traffic and setting swamp any difference between blends.
| Scent | Why it suits the mood |
|---|---|
| One standard · never speciality-specific | Five clauses on one page: public half only, clinical half nothing, boundary at the last real door, fragrance adds scent rather than removing odour, and clinical leadership decides and can always tighten. No registers, machines, rooms or numbers in it. Identical for cataract lists, endoscopy, cosmetic surgery, orthopaedics and ENT alike. |
| One register · held across every speciality and site | Consistency is what makes a signature; uniqueness does not. One register - Quiet Luxury or White Tea Serenity from Rs 299 - across the whole estate means a returning patient meets the same air years later, and it avoids two departmental registers meeting in a shared lift lobby and making a third that belongs to nobody. |
| A different map · redrawn at every site and floor | Because layout, dwell, escort ratio and route count genuinely differ. An ENT boundary may sit behind reception; an ophthalmic hall may be 510 cubic metres of genuinely separate public air; a discreet cosmetic facility may have four routes and need one machine and three blanks. Name every excluded room on the drawing rather than describing a principle. |
| A different number · perceived level, not setting number | Match what a visitor perceives, never the number on the dial, because a 170 cubic metre lobby with a side door and a 510 cubic metre hall with automatic doors will never read the same at the same setting. Calibrate each site separately, write it on a card taped to the machine, and let one named person change it. |
The buying consequence of all this is usually smaller than a group expects, and it is worth being concrete. Because each speciality's scented volume is only its own public half, most individual sites are a single-machine problem. A reception and billing area is very often a SOSA Sukoon at ₹1,899 running the water-based Hotel Collection from ₹299 with 100ml refills at ₹999, or a SOSA Boond at ₹899 for a small enclosed desk. A lounge that runs from seven in the morning to late afternoon without anybody free to refill is where the SOSA Megh at ₹3,499 and its 6 litre tank earns its place. The pack of seven 15ml bottles at ₹1,799 is how a group auditions registers in its own buildings before standardising.
Where a site has a genuinely large connected public half - the ophthalmic hall at about 510 cubic metres, or an open double-height entrance flowing into reception and a lounge - the waterless SOSA Vaayu at ₹11,999 is the commercial answer: approximately 1000 cubic metres of connected air, 400ml tank, freestanding or wall and HVAC mount, DC 12V / 1A at 5W so it needs a live socket, Bluetooth app and timer so it runs in OPD hours only, CE, RoHS and SGS. In a multi-speciality building its timer is more useful than it first looks, because different floors keep different hours and a machine that switches itself off is one fewer thing depending on whoever locks up. And its defining property in any surgical building is negative - waterless cold-air nebulising of undiluted oil, so no water, no humidity and no wet residue. It is an ambient fragrance product for public areas: not a medical device, not an infection-control or air-treatment device, not validated for clinical use.
Two systems and they are not interchangeable: the ₹299 water-based bottle never goes into a Vaayu or into Aangan at ₹25,999 for approximately 8,000 to 10,000 sq ft or Meenar at ₹38,500 for approximately 12,000 to 18,000 sq ft, which run waterless nebulising oil and are ducted decisions taken with your own HVAC consultant - never into air handling that serves a clinical zone, in any speciality. And for a small desk with no plug and nothing to switch off, the SOSA reed diffusers are their own registers from ₹749 lasting about 6 to 10 weeks: Mountain Breeze at ₹849, Morning Freshness at ₹749, Garden Bloom at ₹799, Evening Calm at ₹799 and Fresh Brew at ₹849, with 130ml from ₹1,249 and refills at ₹2,399 and ₹3,499. Note that a reed is a desk-scale object and does not carry across a lobby - a useful honesty in a group standard, because it stops somebody specifying reeds for a 510 cubic metre hall and concluding that fragrance does not work.
For the speciality pages this one summarises: the discreet, multi-route case with the highest over-scenting risk is what fragrance strategy suits a premium plastic-surgery day-care facility; the longest-dwell, tightest-circulation case is how should an orthopaedic day-surgery centre approach reception fragrance; and the most conservative case, where a completely neutral building is frequently the right answer, is should an ENT day-surgery centre use ambient fragrance. If what you actually want is the ranking - which specialities are good candidates for public-area scenting and which are not - that is which day-care medical specialities are most suitable for scenting only their public areas.
What SOSA does not publish and this page will not invent: consumption rate, refill frequency, monthly running cost, machine lifespan, minimum order quantity or installation lead time - which matters more for a group than for a single site, because those are exactly the numbers a multi-site budget wants and exactly the ones that depend entirely on your run hours, volumes and settings. Bring the estate list and the plans to WhatsApp at +91 96192 18531. Bulk orders are welcome, custom label or logo on product is available, and bespoke composition made only for your group is a real SOSA service discussed there rather than priced on a page - though the cheaper honest answer comes first, which is that one of the seven registers held consistently across every speciality and every site already is a signature, because consistency makes a signature and uniqueness does not.
The SOSA scenting range
SOSA sells two different systems and one of the commonest mistakes is mixing them up. Size by the connected air volume of the room you are actually scenting - which in a day-care hospital is almost always the entrance, reception, billing and attendant lounge alone - floor area multiplied by ceiling height gives cubic feet, and cubic feet divided by 35.3 gives cubic metres. A door that stays shut ends one volume and begins another.
| Machine | System | What it is for | Price |
|---|---|---|---|
| SOSA Boond | Ultrasonic · water-based | A small desk or corner unit for one enclosed room - runs the water-based Hotel Collection | ₹899 |
| SOSA Sukoon | Ultrasonic · water-based | A larger ultrasonic for a reception or consultation room - Hotel Collection from ₹299 | ₹1,899 |
| SOSA Megh | Ultrasonic · 6L tank | A large-tank ultrasonic for a bigger lounge that runs all day | ₹3,499 |
| SOSA Vaayu | Waterless cold-air nebulising | The commercial machine - approx 1000 m3 of connected air, Bluetooth app and timer, no water and no humidity | ₹11,999 |
| SOSA Aangan | HVAC nebulising | Ducted scenting for approximately 8,000 to 10,000 sq ft | ₹25,999 |
| SOSA Meenar | HVAC nebulising | Ducted scenting for approximately 12,000 to 18,000 sq ft | ₹38,500 |
Two systems, and they are not interchangeable. The ultrasonics - Boond, Sukoon and Megh - run the water-based Hotel Collection from ₹299. Vaayu and the HVAC machines run waterless nebulising oil; the ₹299 water-based bottle never goes into a Vaayu. SOSA blends are SOSA's own hotel-inspired interpretations and SOSA is independent and not affiliated with any hotel brand. A portion of every order supports girl-child education through Nanhi Kali.
- Vaayu ₹11,999 - waterless cold-air nebulising, approx 1000 m3 connected air, Bluetooth app and timer, 400ml tank, freestanding or wall / HVAC mount, DC 12V / 1A, 5W, mains powered, CE / RoHS / SGS.
- Aangan ₹25,999 for approximately 8,000 to 10,000 sq ft and Meenar ₹38,500 for approximately 12,000 to 18,000 sq ft - both ducted into HVAC.
- The ultrasonics - Boond ₹899, Sukoon ₹1,899, Megh ₹3,499 - run the water-based Hotel Collection from ₹299, with 100ml refills at ₹999.
- Not published, and therefore never stated on this page: consumption rate, refill frequency, monthly running cost, machine lifespan, installation lead time or any minimum order. Those go to WhatsApp +91 96192 18531.
Versailles
A day-care hospital is the most careful room I write about, and I want to be plain about why. Somebody walks in at seven in the morning to have a procedure. Their mother or their husband sits in your lounge for four hours with nothing to do but look at the walls and worry. And a few metres away, behind doors that should stay shut, there is a zone where none of this belongs at all.
So the answer here is not a stronger machine or a cleverer scent. It is a boundary. Entrance, reception, billing and the attendant lounge are the public half of your building and they are allowed to feel like somewhere that was thought about. Pre-op, procedure, recovery and everything clinical are the other half, and the honest answer for all of it is nothing. Not less. Nothing.
Two things I say to every facility that asks. Fragrance adds scent - it never subtracts one, so it cannot cover disinfectant, and a scent laid over disinfectant makes a third smell that reads worse than either. And the decision is not mine or yours alone: what is introduced into the air of a building with a surgical zone belongs to your clinical leads, your infection-control team and your engineers. I would rather lose the sale than have a page of mine used to argue past them.
Frequently asked questions
Facts verified September 2026: SOSA Vaayu ₹11,999 is a waterless cold-air nebulising diffuser rated for approximately 1000 m3 of connected air, with Bluetooth app and timer, a 400ml tank, freestanding or wall / HVAC mounting and a DC 12V / 1A, 5W mains supply. SOSA Aangan ₹25,999 covers approximately 8,000 to 10,000 sq ft and SOSA Meenar ₹38,500 approximately 12,000 to 18,000 sq ft, both ducted into HVAC. The ultrasonic machines - Boond ₹899, Sukoon ₹1,899 and Megh ₹3,499 - run the water-based Hotel Collection fragrance from ₹299, with 100ml refills at ₹999; that water-based bottle is not used in a Vaayu or an HVAC machine. Reed diffusers start at ₹749 and last roughly 6-10 weeks. A coverage rating assumes one connected body of air; scent does not travel through a closed door. Ambient scent research supports improved evaluations of a space and its service, longer dwell and stronger recall at moderate effect sizes - it does not support claims about bookings, fees or retention. Fragrance adds scent and does not remove, neutralise or purify odour, and no SOSA product makes any health, antibacterial or air-purifying claim. No SOSA product is a medical device, a clinical product, an infection-control product or an air-treatment device, and none is validated for use in a clinical environment. Nothing in this guide is clinical, infection-control or engineering advice: in a facility with a surgical or procedural zone, what may be introduced into the air is governed by the operator's own clinical leadership, infection-control policy and facilities engineering, and their decision overrides every recommendation here. SOSA blends are SOSA's own hotel-inspired interpretations; SOSA is independent and not affiliated with any hotel brand. Prices and availability are subject to change - see the live product pages.