An ophthalmic list is short-procedure, high-volume work. A single list can run a large number of cases in a day, which means your front of house does not hold a steady handful of people the way a general consulting floor does. It fills and empties in waves. At the start of a session the seating is full, the desk has a queue, the automatic doors are opening every twenty seconds and there are more human beings in that room than the furniture was drawn for. Ninety minutes later the same room has six people in it and looks like a different building.
Then the second fact, and it is the one most scenting plans for this speciality get wrong. Most of your patients are older, and most of them arrive with somebody. An escort drives them in, sits through the wait, signs things, carries the bag and takes them home. That roughly doubles the occupancy of your public areas, and it quietly makes the attendant seating the biggest room in your front of house rather than reception. Most facilities plan the scenting around the counter and then discover that the counter is not where the people are.
Put those two together and you get the whole page. A room whose occupancy doubles and halves through the day does not read the same at ten in the morning as it does at three in the afternoon, even with an identical setting on the machine, because warm bodies, coats, bags, door traffic and the sheer number of people carry their own air. The temptation is to give somebody a dial and let them chase it. Do not. The honest answer to a predictable daily peak is air change and one fixed low setting chosen for the fullest hour, written down, and left alone.
And the boundary, which is the spine of this whole bank and is not negotiable here either. Entrance, reception, billing and the attendant seating are the public half and they are the only opportunity. Pre-operative areas, the procedure and operating rooms, post-procedure and post-anaesthesia recovery, sterile and decontamination areas, clinical and drug storage and clinical waste get nothing. Not a lower setting. Nothing. And what may be introduced into the air of a building with a surgical zone is decided by your own clinical leadership, your infection-control policy and your facilities engineers, whose decision overrides every recommendation on this page.
Why does the same setting smell different at ten in the morning and three in the afternoon? Because the room is not the same room. At the start of a session the seating is full, the automatic doors are opening constantly and there are thirty or forty people in a volume drawn for half that; by mid-afternoon the same space holds a handful. Occupancy, door traffic and air change are doing the work, not the machine. The correct response is to set the level for the busiest hour so it is never too much, and to accept that the quiet hour reads as almost nothing. That is the level working, not failing.
Does an ophthalmic centre need a bigger machine because of the volume of patients? Not usually, because you size by connected air volume rather than by how many people pass through it. A 1,200 sq ft connected front of house at a 12 ft ceiling is 1,200 x 12 = 14,400 cubic feet, and 14,400 / 35.3 is about 408 cubic metres - well inside the SOSA Vaayu at ₹11,999, which is rated for approximately 1000 cubic metres of connected air. A single enclosed reception is very often a Sukoon at ₹1,899 with the water-based Hotel Collection from ₹299.
One: the volume of human beings. A short-procedure, high-volume list moves a large number of people through a small footprint in a single morning. Most of this bank is written for facilities where a family sits quietly for four hours in a half-empty lounge. Yours is the opposite shape: a lot of people, a lot of turnover, a desk that is genuinely busy, and a room that is physically full at the top of a session. A full room is a different olfactory environment from an empty one. Thirty or forty people bring in coats, bags, the street, the car, their own fragrance and their own warmth, and all of that is already in the air before your machine contributes anything at all.
Two: the escort. Nearly every patient on an ophthalmic list arrives with somebody who brought them and will take them home. That is an operational fact with an architectural consequence: your public occupancy is roughly double your case count, and the seating where those escorts wait is almost always the largest single room in your front of house. If you measure it, you will usually find the attendant seating is bigger than reception. Scenting plans for this speciality are nearly always drawn for the counter, which is the smaller room and the one where nobody stays. Measure both and scent the bigger one properly.
Three: the wave. Occupancy is not steady and it is not random either. It is a timetable. The room is full at the start of a session, thins through the middle and fills again for the next one. That predictability is the useful part, because a predictable peak has an engineering answer and an unpredictable one does not. Your building's air change is what carries a full room; your fragrance setting is what suits the room when it is quiet. So you set the level for the fullest hour, which means it will be almost imperceptible at three in the afternoon, and you leave it there. A level chosen so the busy room is comfortable will never be too much. A level chosen so the empty room smells right will be far too much at ten.
Which is why this page is against the dial. In every facility where somebody has been given permission to adjust the setting during the day, the setting only ever travels in one direction, because the person adjusting it has been standing inside the building for hours and their nose stopped reporting it before the second case was called. Fix the number, write it on a card taped to the machine, and make changing it a decision somebody has to be accountable for rather than a thing that happens on a busy Tuesday.
Everything else follows the rules that govern the whole bank. Fragrance adds scent and never removes odour, so nothing here covers anything. The clinical half gets nothing. The decision belongs to your clinical, infection-control and engineering leads. A portion of every SOSA order supports girl-child education through Nanhi Kali.
There is a particular failure I see in high-throughput facilities and it is worth naming because it is invisible while it is happening. The lobby is full at nine, somebody decides the fragrance "is not coming through", and turns it up. It was coming through perfectly well; it was simply competing with forty people, an open door and a working air-conditioning system, which is exactly what it should have been doing. By two in the afternoon the room is a third full and the setting is now two or three times what the space can carry. Nobody turns it back down, because by then nobody in the building can smell it any more. The visitors can.
Your desk team are the check on this and in your speciality they are more exposed than in most, because your counter works harder. A receptionist at a high-volume ophthalmic centre is in that air eight to ten hours a day, at closer range to the machine than anybody else, while also dealing with a queue. Ask them before you buy and again a fortnight after installation. If any of them mentions the scent, that is a recalibration signal rather than a tolerance problem, and "off" should be a state anybody on the desk can set for a named unit without going to find a manager first.
The other thing your speciality has more of than most is a large, mixed, older public with escorts, and the honest consequence of a bigger public is a higher chance that somebody in it will tell you they react to fragrance. That is not a reason to avoid scenting. It is a reason to treat accommodation as a standing arrangement written into the front-desk routine rather than as an exception somebody has to ask a manager for. More people through the door means the arrangement gets used more often, and a facility that has thought about it in advance handles it in four seconds instead of four minutes.
And one framing for the plan review. In a high-throughput lobby, the things that actually decide whether arrival reads as controlled are queue management, seating count, wayfinding, whether the desk looks up, and whether the room has enough air. Fragrance is a refinement on top of those. If the seating is short and people are standing at the peak, buy chairs before you buy a diffuser.
Throughput, escorts and the wave: what a high-volume ophthalmic list does to a lobby
Three variables decide this, and the register is not one of them. The first is throughput shape: how many people are in the public areas at the busiest point of the day, and how sharply that number rises and falls. The second is the escort multiplier, which changes which room you are actually scenting. The third is how you handle a predictable peak, which is the only genuinely technical decision on this page and the one where most facilities reach for the wrong tool.
What does not decide it: the character of the blend. I have never walked into an ophthalmic day-surgery centre and thought the problem was that somebody chose cedar rather than white tea. I have walked into plenty where a perfectly sensible register was running at three times what a full room could carry, because it had been set in an empty room, and where the machine was standing in the corridor that leads to the clinical doors because that was where the socket was.
It is worth being physical about what your front of house actually is, because the numbers move more than people expect. Hospital lobbies are commonly 10 to 14 feet, and a purpose-built entrance can be double height at 16 to 20 feet, so state the assumption every time you do the arithmetic. A 900 sq ft lobby at 12 ft is 900 x 12 = 10,800 cubic feet, and 10,800 / 35.3 is about 306 cubic metres. The attendant seating next to it at 700 sq ft and an 11 ft ceiling is 700 x 11 = 7,700 cubic feet, or 7,700 / 35.3, about 218 cubic metres. If a wide opening connects them, you are not scenting a 306 cubic metre room and a 218 cubic metre room. You are scenting one connected body of roughly 524 cubic metres, and that single number decides your machine.
Then the traffic. Your automatic entrance doors open for every arrival, every discharge, every escort stepping out to move a car and every delivery, and on a high-volume list that is a near-continuous partial exchange of lobby air with the street. That is a genuine air change and it is the honest reason your lobby loses fragrance faster than a showroom of identical size. It is also, and this matters, a good thing. A room that holds forty people wants air moving through it. The correct response is to size and place the fragrance around the ventilation you have, and never, in any phrasing, to reduce air exchange, close a vent or turn down extraction so that a scent lingers. In a healthcare building that is the worst trade anybody could offer you.
The last framing before the detail. Everything below is about rooms, air and dwell. Nothing on this page is a clinical, infection-control or engineering statement, no SOSA product is a medical device or validated for clinical use, and nothing here is a claim about what any fragrance does to any person. What a room communicates is a design question. What a room does to a patient is not a question this page is entitled to answer, and it does not try.
Here is why it matters more in your speciality than in almost any other. A room's smell is not produced by the machine alone; it is produced by everything in the room, and people are the largest variable. Forty people in a lobby bring in outdoor air on their clothes, warmth, bags, the inside of forty cars, and in many cases their own fragrance. They also make the automatic doors work harder, which pulls more street air in behind them. A room at capacity is olfactorily busy before you contribute anything. The same room at a third of capacity with the doors mostly shut is quiet, still and far more receptive to whatever you have added.
So the same setting genuinely produces two different results, and neither of them is the machine misbehaving. At ten in the morning your register is one thread in a busy room and a visitor will not consciously register it at all, which is correct. At three in the afternoon it is the only thing happening in a quiet room and it is clearly perceptible from the doorway, which is also correct. The mistake is treating the first reading as a fault and the second as the target. It is the other way round: the busy reading is the room doing its job, and the quiet reading is where over-scenting shows up first.
One more consequence of throughput that is worth planning for. High turnover means a large number of first impressions per day rather than a small number of long ones. Every one of those people walks in from the street with a clean nose. A visitor who has been outside is far more sensitive to whatever is in your lobby than anybody who works in it, and in a high-volume centre you are creating that moment several hundred times a week. Set for the person walking in, always, because in your building that person is the majority of your audience. Judge it from the doorway on a Monday morning into a building that has been shut since Saturday evening, not from behind the desk on a Friday.
And the last piece, which stops this being a marketing exercise. A patient waiting to be called is not in a state to be marketed at, and the closer a waiting position sits to the clinical door, the quieter it should be. My default for any holding position adjacent to that door is the same register as the front at the same level, or nothing at all, and never a level of its own.
The first consequence is arithmetic. If your morning list is thirty cases and nearly all of them arrive accompanied, your public areas are handling something closer to sixty people rather than thirty, and they are not evenly spread. The patients move through - check in, wait, get called, go through the door. The escorts stay put. So the seating area accumulates people while the counter cycles them, and by the middle of a session the room with the most human beings in it is the one nobody planned the atmosphere for.
The second consequence is which volume you buy for. Measure both rooms and be honest about whether a door separates them. A 400 sq ft reception at a 10 ft ceiling is 400 x 10 = 4,000 cubic feet, and 4,000 / 35.3 is about 113 cubic metres. An attendant seating area at 700 sq ft and 11 ft is 7,700 cubic feet, about 218 cubic metres. If they are open to one another, that is one connected volume of roughly 331 cubic metres and one machine placed in the seating serves both. If a door between them stays shut, they are two volumes and the seating is the one that deserves the machine, because that is where somebody sits for three hours.
The third consequence is what the seating area is for, and this is where the legitimate commercial opportunity in your building actually sits. An escort is not a patient. They are not waiting to be called, they are not fasting, they have nothing to do for three or four hours and their entire experience of your facility is the chairs, the light, the noise, the wayfinding and the air. That is the most legitimately scentable room in a day-surgery building and it is the room where a quiet, consistent, unsweet register does its most useful work. Set it for the person at hour three rather than the person at minute five, and it will be quietly right for both.
And the fourth is furniture rather than fragrance, which is a recurring theme in this bank and is more acute in a high-throughput building than anywhere. Upholstered seating at high occupancy is the most under-appreciated reservoir in the front of house. It holds whatever has been in the room, and in a facility that runs full sessions six days a week it holds a lot. Cleaning and laundering frequency for soft furnishing is a housekeeping specification with an operational answer, and it comes before fragrance rather than after it. Source, then ventilation, then cleaning, then scent, in that order, always. Fragrance adds scent and it does not remove odour, so it cannot be asked to do the work of the first three.
The first honest tool is air change, and it belongs entirely to your own facilities engineers. A room that holds forty people at the top of a session needs air moving through it, and how much is an engineering question answered by the people who designed and maintain your air handling, with reference to your building rather than to a page. This page has exactly one thing to say about it and it says it in the strongest terms available: never reduce ventilation, close a vent, block a return or turn down extraction so that a fragrance lasts longer. Not in a lobby, not in a corridor, not anywhere in a healthcare building, not for any commercial reason. A well-ventilated lobby is genuinely harder to scent, and this page would rather say so honestly than pretend otherwise. Ventilation wins. The engineers win. You solve the fragrance problem with sizing, placement and level instead.
The second honest tool is a fixed low level chosen for the fullest hour. Set it while the room is at its busiest, judged by somebody who has just walked in off the street, and then never move it. Written down. On a card taped to the machine, with the register name and the number. The consequence is that the quiet afternoon room will read as almost nothing, and you have to decide in advance that this is acceptable, because it is the correct outcome rather than a failure. A facility whose lobby is faintly, consistently pleasant when full and almost neutral when empty is a facility nobody will ever complain about. A facility whose lobby is right when empty is a facility that is too much for sixty people twice a day.
The dishonest tool is the dial, and I want to be specific about why it fails rather than just disapproving of it. The person who adjusts it is always somebody inside the building. Olfactory adaptation is ordinary, fast and universal: within minutes of arriving, a person stops consciously registering a steady ambient smell. So the human being holding the dial is the least qualified sensor in the room, and the adjustment they make is nearly always upward. Over a few months the setting ratchets, because there is no feedback loop pushing it back down. The only stable system is a fixed number that somebody has to be accountable for changing.
The timer is what makes the fixed level practical in a high-throughput building, and it is the argument for the SOSA Vaayu at ₹11,999 over anything with a knob on it in this speciality. Its Bluetooth app and timer mean the machine runs your session hours and nothing else: on before the first list arrives, off when the last escort leaves, not quietly running at three in the morning into a closed and empty building. That is also the answer to the overnight problem that shows up in every hospital bank, where a building shut from evening to morning gives its first arrival a concentrated version of whatever ran all night.
Finally, placement, which is a zone question and the one that matters most in a building with a surgical zone. Put the unit in the volume you intend to scent, facing into it, away from the entrance draught and away from any return grille. Do not put it in the corridor because that is where the free socket is; a corridor is a fifteen-second space connected to everything, and it is where scenting plans get broken. If fragrance is reaching somewhere it should not, the usual culprits are a door undercut, a shared return, a corridor acting as a plenum or a machine sitting in a supply airstream, and every one of those is an engineering question for your own HVAC consultant rather than a page. A scenting unit is never ducted into air handling that serves a clinical zone.
- Count people in the public areas at four points in a normal working day.
- Measure the attendant seating separately - it is usually your largest public room.
- Set one low level during the fullest hour and write it on a card at the machine.
- Take placement and air change to your own engineers before anything is drilled.
Which register, at what fixed level, and the zones that get nothing at all
Now the register, which matters least and is chosen quickest. 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.
For a high-throughput ophthalmic front of house the steer is the same as for any building with a surgical zone, with one extra filter that belongs to your speciality. Clean and unsweet reads right, because a heavy or sweet character in a clinical building reads as covering something rather than as generosity. The extra filter is durability across a crowded room: you want a register that is happy to sit underneath other things, because at the top of a session it will be sitting underneath forty people, an open door and the street.
White Tea Serenity - white tea, aloe, cedar - is clean, weightless and spa-like, and it is the register that most naturally reads as clean rather than as scented. It agrees with pale walls, glazing and a minimal fit-out, which is what most modern ophthalmic centres actually look like, and it is very hard to over-notice, which is a virtue in a room whose occupancy triples twice a day.
Quiet Luxury - white tea, bergamot, cedar - is the same idea with more finish. The bergamot gives it a little lift at a threshold that the aloe version does not have, which is useful in a lobby where the main event is arrival and the door is constantly moving. If you have no strong view, run this one and stop thinking about it.
Forest Suite - cedarwood, vetiver, green leaves - is the third good answer and the right one where the fit-out is stone, timber, concrete or has real planting in it. It reads as structural rather than decorative, which means a very mixed public of sixty people tends to receive it as part of the building rather than as somebody's chosen fragrance. In a room with that many strangers in it, that is a real advantage.
Tea Garden - jasmine, green tea, white tea - keeps the jasmine inside the tea rather than on top of it, which makes it the least risky floral here. It is a step warmer than the two white-tea registers and wants a correspondingly lower setting, and I would be careful with it in a smaller enclosed reception where there is nowhere for it to go. Warm Welcome - citrus, floral, sandalwood - is a genuine threshold register for a family-facing neighbourhood facility, used at a fraction of what a hotel would use, and if you are in any doubt in a hospital, do not.
Old-World Glamour - amber, violet, woods - is plush and evening-elegant, and it is the wrong shape for this building for two reasons: plush in a clinical setting is exactly the character that reads as covering, and it is an evening register in a room whose most important hour is seven in the morning. Lobby Bar - citrus, pepper, amber - is bold, playful and after-dark, and it has no home in a day-surgery centre at any setting, because turning a theatrical register down produces a quiet theatrical register rather than an appropriate one.
Those seven are the water-based Hotel Collection for the SOSA ultrasonics. The Vaayu and the ducted machines run four hotel-inspired waterless blends supplied with the machine as one of three bundle choices. They are two different fragrance systems rather than the same bottle in two sizes, so say on WhatsApp what you are planning before you buy. And this page will not rank the seven against each other on measured throw or longevity: SOSA does not publish that comparison, and connected volume, ceiling height, ventilation, door traffic, occupancy and setting swamp any difference between blends in a room nobody has stood in.
| Scent | Why it suits the mood |
|---|---|
| White Tea Serenity · entrance and reception | White tea, aloe and cedar. Clean, weightless and hard to over-notice, which is what you want in a threshold that goes from empty to forty people and back twice a day. It sits underneath the street air, the door traffic and everything sixty visitors bring in with them rather than trying to meet any of it in the middle of the room. |
| Quiet Luxury · the escort seating, and the safe default | White tea, bergamot and cedar. Hushed and polished, with enough lift at a threshold to survive a constantly opening door. This is the register to run in the biggest room in your front of house, set for the person who has been sitting there three hours rather than the person who just arrived. |
| Forest Suite · timber, stone or planted interiors | Cedarwood, vetiver and green leaves. Structural rather than decorative, so a large mixed public receives it as part of the building. A useful property when the room holds sixty strangers at the top of a session and you would rather nobody thought about the air at all. |
| Nothing at all · the whole clinical half | Pre-operative areas, the procedure and operating rooms, post-procedure and post-anaesthesia recovery, sterile and decontamination areas, clinical and drug storage and clinical waste. Not a lower setting. Nothing. Write it as a list of named rooms on the same drawing that carries the scenting plan, and treat your clinical and infection-control leads as the owners of that list. |
So the buying answer for a high-volume ophthalmic centre. Do the arithmetic first and state the ceiling height every time, because in a lobby it is the number that moves most. A 400 sq ft reception at 10 ft is 4,000 cubic feet, about 113 cubic metres. A 700 sq ft escort seating area at 11 ft is 7,700 cubic feet, about 218 cubic metres. A 900 sq ft lobby at 12 ft is 10,800 cubic feet, about 306 cubic metres. A 1,200 sq ft connected front of house at 12 ft is 14,400 cubic feet, about 408 cubic metres. A 1,600 sq ft public floor at 12 ft is 19,200 cubic feet, about 544 cubic metres, and a 2,000 sq ft one at 14 ft is 28,000 cubic feet, about 793 cubic metres. A double-height 1,000 sq ft entrance at 18 ft is 18,000 cubic feet, about 510 cubic metres, which is roughly twice what the floor plan suggests.
Against those figures: a single enclosed reception is usually an ultrasonic and nothing more, either the SOSA Boond at ₹899 for a small desk or the SOSA Sukoon at ₹1,899 for a normal reception and billing area, both running the water-based Hotel Collection from ₹299 with 100ml refills at ₹999. The pack of seven 15ml bottles at ₹1,799 is how you audition registers in your own lobby air rather than from a description, and you judge each one on day five rather than on the first afternoon. If your escort seating is large and runs from the first list to the last without a break, the SOSA Megh at ₹3,499 with its 6 litre tank saves somebody refilling in the middle of a session.
For a larger connected front of house, the waterless SOSA Vaayu at ₹11,999 is the commercial answer and it is a particularly good fit for your speciality. It is rated for approximately 1000 cubic metres of connected air, and SOSA's own copy also states 2,000 to 3,000 sq ft scented evenly, so a 408 or 544 cubic metre connected public half is comfortably inside it. It nebulises undiluted oil in cold air, which means no water, no humidity and no wet residue anywhere in a building with a surgical zone. It takes a 400ml tank, mounts freestanding, on a wall or into HVAC, runs on DC 12V / 1A at 5W so it needs a live socket, and carries CE, RoHS and SGS. The Bluetooth app and timer are the part that matters most here, because they are what let you run session hours at one fixed level without anybody touching the machine. It is an ambient fragrance product for public areas. It is not a medical device, not an infection-control or air-treatment device and not validated for clinical use: it adds scent rather than removing odour, and it cannot travel through a closed door.
Two systems, and they are not interchangeable. The ₹299 water-based bottle never goes into a Vaayu, nor 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. And if what you want is no plug, no noise and nothing to switch off at a small desk, the SOSA reed diffusers are a separate set of registers from ₹749 lasting about 6 to 10 weeks: Morning Freshness at ₹749 is Malabar lemon, mint and eucalyptus and Mountain Breeze at ₹849 is Himalayan pine, sage and cedar, the two closest to a healthcare desk, while Fresh Brew at ₹849 is the wrong shape here for the sweetness reason above. Reeds are also the honest answer for a small satellite consulting suite where a machine would be over-specified.
Read next, from inside this speciality group. If your work is cataract-led and the same person comes back the next morning for review, the argument changes from throughput to consistency and it is set out in should a premium cataract surgery centre scent its reception. If part of your building runs a different speciality with much longer public dwell before anything happens, the washroom and long-wait argument is in how a gastroenterology day-care centre should approach reception scenting. And if your front of house is genuinely brand-led and you are being pushed to make it feel like a spa, read how a cosmetic day-surgery centre should approach signature scent for the case that restraint is the premium signal.
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. Those depend on run hours, connected volume and setting, and they are yours rather than ours. Send the plan and have that conversation on WhatsApp at +91 96192 18531. Bulk orders are welcome, custom label or logo on product is available, and bespoke composition 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 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.