Two thousand square feet at a 12 ft ceiling is 2,000 x 12 = 24,000 cubic feet, and 24,000 divided by 35.3 is about 680 cubic metres. That is the number a supplier will quote against, and it is the wrong number. It assumes the whole building is one connected body of air, and a day-care hospital is the least connected building in commerce - it is a series of rooms whose doors are shut for reasons that have nothing to do with fragrance.
Do the subtraction properly and the building looks completely different. Take out the theatre, pre-operative holding, post-procedure recovery, the sterile and decontamination area, clinical and drug storage, the clinical waste hold and the consulting rooms, all of which are at zero by design and not at a lower setting. Take out staff areas, WCs and circulation, which nobody was ever going to dose. What is left is an entrance, a reception and billing counter, a general waiting area and an attendant lounge - about 600 sq ft, which at 12 ft is 600 x 12 = 7,200 cubic feet, and 7,200 / 35.3 is about 204 cubic metres.
Six hundred and eighty on paper. Two hundred and four in reality. Under a third, and this is the size at which that gap is most striking, because 2,000 sq ft sounds big enough to justify a commercial machine and the air that is actually in play does not. It is also the size where the four public spaces are genuinely distinct rooms rather than one lobby, so the honest answer stops being "one machine" and becomes "work the plan line by line and see how many volumes you actually have".
That is what this page does. It walks a representative 2,000 sq ft plan room by room with the arithmetic beside each line, adds the floor areas back up as a check, and ends with a purchase. And it carries the same standing condition as every page in this bank: what may be introduced into the air of a building with a theatre is decided by your own clinical leadership, infection-control policy and facilities engineers, they can extend the zero list, they can rule the whole idea out, and their decision overrides everything written here.
Is a Vaayu the right machine for a 2,000 sq ft day-care hospital? Usually not, and the ratio says why. The SOSA Vaayu at ₹11,999 is rated for approximately 1000 cubic metres of connected air; your scented volume is about 204, so it is roughly five times what you have - and that 204 is split across four rooms that may not even be one connected volume. Two Sukoon machines at ₹1,899 each, one in the reception volume and one in the attendant lounge, is very often the whole purchase.
What if my ceiling is 14 ft rather than 12? Then say so, and redo it. 2,000 sq ft at 14 ft is 2,000 x 14 = 28,000 cubic feet, about 793 cubic metres nominal. The public 600 sq ft at 14 ft is 600 x 14 = 8,400 cubic feet, about 238 cubic metres. The proportion barely moves, which is the point: height changes the absolute numbers and the subtraction still lands in the same place. Never assume 10 ft silently, and measure to the false ceiling tile rather than the slab.
The four public spaces - scented. Entrance and lobby, 120 sq ft: at a 12 ft ceiling that is 120 x 12 = 1,440 cubic feet, and 1,440 / 35.3 = about 41 cubic metres. Reception and billing, 180 sq ft: 180 x 12 = 2,160 cubic feet, about 61 cubic metres. General waiting, 150 sq ft: 150 x 12 = 1,800 cubic feet, about 51 cubic metres. Attendant and family lounge, 150 sq ft: 150 x 12 = 1,800 cubic feet, about 51 cubic metres. Public subtotal: 120 + 180 + 150 + 150 = 600 sq ft, which at 12 ft is 600 x 12 = 7,200 cubic feet, about 204 cubic metres. Check the parts: 41 + 61 + 51 + 51 = 204.
The zeroes, with a reason beside each. Two consulting rooms at 140 sq ft each, 280 sq ft: at 9 ft that is 280 x 9 = 2,520 cubic feet, about 71 cubic metres - off the plan because the doors are shut and because each 36 cubic metre room is so small that a level correct in reception would be several times what it can carry. Pre-operative holding, 180 sq ft at 10 ft: 180 x 10 = 1,800 cubic feet, about 51 cubic metres - nothing. Theatre, 400 sq ft at 10 ft: 400 x 10 = 4,000 cubic feet, about 113 cubic metres - nothing. Post-procedure recovery, 250 sq ft at 10 ft: 250 x 10 = 2,500 cubic feet, about 71 cubic metres - nothing. Sterile and decontamination, 100 sq ft at 10 ft: 100 x 10 = 1,000 cubic feet, about 28 cubic metres - nothing. Clinical and drug storage, 60 sq ft at 10 ft: 600 cubic feet, about 17 cubic metres - nothing. Clinical waste hold, 40 sq ft at 10 ft: 400 cubic feet, about 11 cubic metres - nothing. Staff change, WCs and circulation, 90 sq ft - nothing, and nobody was proposing otherwise.
The floor-area check: 600 + 280 + 180 + 400 + 250 + 100 + 60 + 40 + 90 = 2,000 sq ft. Nothing has gone missing.
So the subtraction reads: 680 cubic metres nominal at 12 ft, minus every line above, equals 204 cubic metres of public air. Under a third of the building, and the actual specification.
Now the second question, which at this size matters as much as the first: is that 204 one volume or several? Walk it and look for the last real door. In most 2,000 sq ft facilities the entrance, reception and general waiting run together as one open body of air - 41 + 61 + 51 = 153 cubic metres - and the attendant lounge sits behind a door at 51 cubic metres of its own. That is two volumes, which means two machines, because a machine cannot push scent through a closed door and has no interest in trying.
Which gives the purchase. A SOSA Sukoon at ₹1,899 in the 153 cubic metre reception volume, and a second Sukoon at ₹1,899 in the 51 cubic metre lounge, or a Boond at ₹899 there if it is small and enclosed. Both running the same register from the water-based Hotel Collection at ₹299, so the public half reads as one house character rather than as two rooms decided separately. Total around ₹4,000 rather than ₹11,999. A portion of every SOSA order supports girl-child education through Nanhi Kali.
This is the size where I most often have to say the same sentence twice before it lands: the building is not the unit. At 1,000 sq ft nobody argues, because the public area is obviously one small reception. At 5,000 sq ft nobody argues either, because the zoning is visibly complicated and everybody expects a plan. Two thousand is the awkward middle. It sounds like a proper facility, it usually has a real lobby and a real lounge, and the instinct is that a proper facility needs a proper machine. The arithmetic says otherwise, and the arithmetic is not a negotiating position.
Here is the check that settles it in thirty seconds. Take your nominal volume - 2,000 x 12 = 24,000 cubic feet, about 680 cubic metres - and then ask one question of every room: would a member of the public sit, queue, pay or wait in there? If no, it contributes nothing. In a day-care hospital that question eliminates most of the floor plate, because most of the floor plate is theatre, recovery, pre-op, sterile, storage and the rooms clinicians work in. What is left is the answer, and it is smaller than the lease.
The second thing worth doing before you spend anything is the free work, because it is where most of the improvement lives at every size. If your lobby smells of the morning cleaning round, of the corridor, or of a building that was shut since the previous evening, no machine on this page fixes it - fragrance adds scent and it does not remove odour. Source first, then ventilation, then cleaning and laundering, then fragrance. The upholstered seating in a 51 cubic metre attendant lounge is the most under-appreciated reservoir in a day-care hospital, it holds whatever has been in that room, and laundering it changes the room more than any bottle will.
And the level. In a 51 cubic metre lounge where a family sits for four hours while somebody is in theatre, set for the person at hour four rather than the person at minute three. If it is unobjectionable at hour four it was quietly right at minute three, and that person was never going to be the one who minds. Write the setting on a card taped to the machine and leave it alone for a fortnight. When somebody says "it has faded", it has almost certainly not faded - the nose of the person judging it has adapted, which is what noses do. Ask somebody who has just come in off the street instead of reaching for the dial.
The subtraction, done line by line on a real 2,000 sq ft plan
Three things decide how a 2,000 sq ft day-care hospital should approach this, and the total square footage is the one that misleads. The first is the subtraction: every zeroed area comes out before anything is priced. The second is the count of connected volumes in what remains, because 204 cubic metres in one open space and 204 cubic metres split across three rooms with doors between them are completely different purchases. The third is the level, which is where it goes wrong in practice regardless of what you bought.
It is worth saying why 2,000 sq ft is a genuinely distinct case rather than a point on a line. At this size a day-care hospital has, for the first time, more than one public room that matters. A 1,000 sq ft centre has a reception and that is the conversation. A 2,000 sq ft facility usually has an entrance, a reception and billing counter, a general waiting area for people who are being called through, and a separate attendant or family lounge for the people who are not. Those four rooms have different occupancies, different dwell times and different constituencies, and they are the reason this page has to walk a plan rather than quote a coverage figure.
The physical facts that shape the arithmetic. Lobby and public-area ceilings in a purpose-built day-care hospital are commonly 10 to 14 ft, and a designed entrance can be double height at 16 to 20 ft over a small footprint. Clinical ceilings are usually lower, often around 10 ft, and consulting rooms lower still at about 9 ft. The entrance doors are frequently automatic, which is a genuine and continuous air change and the honest reason a hospital lobby loses fragrance faster than a showroom of the same volume. The building is air-conditioned with sealed glazing, which means the room you think you are dosing may be joined to another one through a return grille you have never looked at. And the clinical half has air handling designed by people who were not thinking about your brand, which is exactly as it should be.
One more framing before the detail. The attendant lounge is the most legitimately scentable room in a day-care hospital and it is worth saying why rather than asserting it. An attendant is not a patient. They drove somebody in at six in the morning, they will sit for three to five hours with nothing to do, they are not fasting, they are not waiting to be called, and their entire experience of your facility is the seating, the light, the wayfinding and the air. That is a room where a considered atmosphere is doing honest work. The general waiting area, by contrast, holds people who are about to be called through, and the closer a waiting space sits to the clinical door the quieter it should be - my default is the same register as the front at the same level, or nothing, never a level of its own.
The nominal figure first, so you can see what you are subtracting from. 2,000 sq ft at a 12 ft ceiling is 2,000 x 12 = 24,000 cubic feet, and 24,000 / 35.3 = about 680 cubic metres. At a 14 ft ceiling it is 2,000 x 14 = 28,000 cubic feet, about 793 cubic metres. State which one you are using. Never assume 10 ft silently, and measure to the false ceiling tile rather than the structural slab, because the tile is what the air sits under.
SCENTED - entrance and lobby, 120 sq ft. 120 x 12 = 1,440 cubic feet, about 41 cubic metres. A threshold rather than a room: dwell is seconds, the doors open constantly, and it is the easiest place in the building to over-dose because the instinct is to turn it up until the threshold announces itself. What you dose here leaks into everything behind it.
SCENTED - reception and billing, 180 sq ft. 180 x 12 = 2,160 cubic feet, about 61 cubic metres. The opportunity. Dwell is genuinely unpredictable - four minutes at check-in and forty when the list slips - so set for the long tail rather than the average, which in practice means lower than instinct suggests.
SCENTED - general waiting, 150 sq ft. 150 x 12 = 1,800 cubic feet, about 51 cubic metres. People here are waiting to be called through. Same register as the front, same level or quieter, never a level of its own.
SCENTED - attendant and family lounge, 150 sq ft. 150 x 12 = 1,800 cubic feet, about 51 cubic metres. The most legitimately scentable room in the building, and the one to set for hour four rather than minute three.
Public subtotal: 120 + 180 + 150 + 150 = 600 sq ft, 600 x 12 = 7,200 cubic feet, 204 cubic metres. The parts check: 41 + 61 + 51 + 51 = 204.
ZERO - two consulting rooms, 280 sq ft. At 9 ft, 280 x 9 = 2,520 cubic feet, about 71 cubic metres, which is about 36 each. Reason: the door is shut so it is a separate body of air anyway, and 36 cubic metres is small enough that a level correct in a 61 cubic metre reception would be far too much for two people sitting at close range.
ZERO - pre-operative holding, 180 sq ft. At 10 ft, 1,800 cubic feet, about 51 cubic metres. Reason: a patient here has been fasting since the previous night, is in a gown and is waiting to be called. That is not a person to be marketed at, and it is an aesthetic and ethical point that stands on its own without any claim about what fragrance does or does not do.
ZERO - theatre, 400 sq ft. At 10 ft, 4,000 cubic feet, about 113 cubic metres. ZERO - post-procedure recovery, 250 sq ft. At 10 ft, 2,500 cubic feet, about 71 cubic metres; nausea after a procedure or an anaesthetic is ordinary and widely known and recovery is where people experience it, which is reason enough for that room to stay fragrance-free, and this page makes no claim in any direction about fragrance and that fact. ZERO - sterile and decontamination, 100 sq ft, 1,000 cubic feet, about 28 cubic metres. ZERO - clinical and drug storage, 60 sq ft, 600 cubic feet, about 17 cubic metres. ZERO - clinical waste hold, 40 sq ft, 400 cubic feet, about 11 cubic metres; and a waste smell is a source, containment and collection-frequency problem with an operational answer, never a fragrance one. ZERO - staff change, WCs and circulation, 90 sq ft.
Floor-area check: 600 + 280 + 180 + 400 + 250 + 100 + 60 + 40 + 90 = 2,000 sq ft. And the subtraction: 680 minus everything equals 204. Write that zero column on the drawing as named rooms with the word none and a short reason beside each, take it to your clinical leads, and let them extend it.
Every coverage rating you will read, including SOSA's, assumes one connected body of air. A machine cannot push scent through a closed door, and it has no particular enthusiasm for pushing it against a pressure difference either. In most other commercial buildings that is a nuisance. In a day-care hospital it is the feature - it is precisely what makes "scented public half, fragrance-free clinical half" an arrangement you can deliver rather than a claim you hope nobody tests.
So walk the public half and mark the boundaries where a real door sits. In a representative 2,000 sq ft facility you will usually find two volumes. Volume one: entrance, reception and general waiting running together as one open body of air, 41 + 61 + 51 = about 153 cubic metres. Volume two: the attendant lounge behind a door, about 51 cubic metres on its own. Occasionally you will find three, if the general waiting area is also behind a door, giving 102, 51 and 51. Occasionally one, if the whole front of house is genuinely open plan at 204.
Count them, because the count is the machine count. Two volumes means two machines, not one bigger one. This is the most common and most expensive misunderstanding in commercial scenting: a facility buys a machine rated well above its total public volume, places it in reception, and then cannot understand why the lounge behind the door smells of nothing. The machine is working perfectly. It is simply in a different room.
Be strict about what counts as a boundary, because this is where plans quietly fail. The boundary is the last real door. A curtain is not an air boundary. An archway is not an air boundary. A glazed screen with a gap over it is not an air boundary. A change of flooring is not an air boundary, and a sign saying "waiting area" is emphatically not an air boundary. If air passes, it is one volume, and if air passes to somewhere it should not, that is a problem rather than a saving.
Which leads to the thing to check before anything is fixed to a wall. Air conditioning can join rooms that look separate on a drawing. If reception smells right and the lounge smells of nothing, look for a return grille before you buy a second machine. If fragrance is arriving somewhere it should not - and in this building "somewhere it should not" means the clinical side - the usual culprits are mundane and physical: a door undercut, a shared return grille, a corridor acting as a plenum between two zones that look separate, or a machine standing in a supply airstream. None of those are fragrance problems and none have fragrance answers. They are placement and air-handling questions answered by your own facilities engineers and HVAC consultant, and a scenting unit is never ducted into air handling that serves a clinical zone.
And the corridor. At 2,000 sq ft there is a spine corridor running from reception to pre-op, theatre and recovery, and it is where machines physically end up because that is where the spare socket is. Do not. A corridor is a fifteen-second space connected to everything, so a unit there is dosing the corridor, reception gets the leak, and the clinical doors get tested every time somebody walks through them. Put each unit inside the volume it is meant to serve, facing into the room, away from the corridor and away from any return.
Whatever you find, the answer is never to reduce air exchange, close a vent or turn down extraction so the fragrance holds longer. In a building with a theatre that is the worst sentence anybody in my trade could write. A well-ventilated lobby is genuinely harder to scent, and that is the honest position. Ventilation wins, the engineers win, and you solve it with placement, sizing and level.
Volume one, about 153 cubic metres of entrance, reception and general waiting. That is a SOSA Sukoon at ₹1,899 running the water-based Hotel Collection from ₹299, with 100ml refills at ₹999. Place it in the reception part of the volume rather than at the door, because the doorway is where the air is least stable and most likely to tempt somebody into turning it up. If this volume runs from seven in the morning to eight at night and nobody wants to refill anything mid-list, the SOSA Megh at ₹3,499 with its 6 litre tank is the version that needs less attention.
Volume two, about 51 cubic metres of attendant lounge behind a door. That is a second Sukoon at ₹1,899 if you want the level held identically to the front, or a SOSA Boond at ₹899 if the room is small and enclosed, or a reed diffuser from ₹749 if there is no sensible socket and nobody to switch anything on - a reed is a point source in still air and a 51 cubic metre enclosed lounge is exactly the room where that works properly. A reed lasts about 6 to 10 weeks; the 130ml is from ₹1,249, with 300ml refills at ₹2,399 and 500ml at ₹3,499.
Total: between about ₹2,650 and ₹5,400 depending on those choices, plus fragrance. That is the honest number for a 2,000 sq ft day-care hospital, and it is a fraction of what the square footage implies.
Now the machine this page has to be straight about. The SOSA Vaayu at ₹11,999 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. Your scented volume is about 204 - and it is not even one connected body of air, it is two. So the Vaayu is roughly five times the air you have, sitting in a building where it could only ever address part of it at a time. That is not a good purchase at 2,000 sq ft and I would rather say so.
There is one honest exception, and it is worth stating because it will apply to some readers. The Vaayu's defining properties in a healthcare building are not about capacity at all. It is waterless cold-air nebulising of undiluted oil - no water, no humidity and no wet residue - which is the entire reason a facility with a theatre will consider it where it will not consider a machine with a water tank. And it has a Bluetooth app and timer, so scenting follows your OPD hours and never runs overnight into a closed building. If your infection-control or engineering leads have said that nothing with a water tank goes into the public areas, then the question is no longer 204 against 1000; the question is which waterless machine, and there is one. It takes a 400ml tank, mounts freestanding or 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. That is a legitimate reason to spend ₹11,999 at this size. "The building is 2,000 sq ft" is not.
And the two systems are not interchangeable, which is the commonest ordering error in the range. The ultrasonics - Boond, Sukoon and Megh - are water-based and run the ₹299 Hotel Collection. The Vaayu, Aangan at ₹25,999 for approximately 8,000 to 10,000 sq ft and Meenar at ₹38,500 for approximately 12,000 to 18,000 sq ft run waterless nebulising oil. The ₹299 water-based bottle never goes into a Vaayu or an HVAC machine. The ducted pair are not a 2,000 sq ft conversation in any case, and in a healthcare building they are only ever discussed where the public areas sit on entirely separate air handling from the clinical zone - an engineering question for your own HVAC consultant, never a page's, and never ducted into air handling that serves a clinical zone.
Then the level, which is what actually fails. Set both machines low on day one, lower than feels like it is working. Write the register and the setting on a card taped to each unit. Do not touch them for two weeks. Judge from the doorway on a Monday morning into a building that has been shut since Saturday, not from behind the desk on a Friday evening. Ask three people who have just walked in off the street what they notice before you tell them a diffuser exists: if nobody mentions it and nobody is bothered, you are approximately right, and if two of the three can name a product, come down a notch. And if a visitor or a member of staff says they react to fragrance, that is a standing arrangement rather than a favour - anybody on the desk switches that named unit off, immediately, without finding a manager, and the report is a recalibration signal rather than a tolerance problem. Your front desk, billing and housekeeping teams are in that air eight to ten hours a day and are the most exposed people in the building.
- Write every room with its area and one word beside it: scented or zero.
- Compute the scented column only, stating the ceiling height for each room.
- Add all the floor areas back up and check they total your lease figure.
- Count the connected volumes by finding the last real door, then buy per volume.
One register across four public spaces, and the list that gets none
One register across all four public spaces, held at a small number of written levels. That is the whole scenting plan for a 2,000 sq ft facility, and the register you pick matters less than the fact that it is the same one everywhere the public goes.
There are seven registers in the water-based Hotel Collection, each SOSA's own hotel-inspired interpretation; SOSA is independent and not affiliated with, endorsed by or connected to any hotel brand. The steer in a building with a theatre is narrower than in any other commercial vertical and it is a context steer rather than a taste one: clean and unsweet reads right here. A heavy, sweet or plush character in a clinical building reads as covering something, because that is what sweetness over a warm enclosed room usually means in ordinary life. In a restaurant warmth reads as generosity; in a hospital lobby, where a family has already caught a trace of disinfectant from the corridor and arrived slightly braced, it reads as concealment.
White Tea Serenity - white tea, aloe and cedar. Clean, weightless and spa-like, and the register that most naturally reads as clean rather than as scented. It agrees with pale walls, glazing, daylight and light timber, and it is very hard to over-notice, which is a virtue across four rooms with four different dwell times. Quiet Luxury - white tea, bergamot and cedar. Hushed and polished, the same family with more finish, and the safest single decision in the collection for a very mixed public. If you have no strong view, run this one across all four spaces and stop thinking about it.
Forest Suite - cedarwood, vetiver and green leaves. Grounding and biophilic green, and the right answer where the fit-out has timber, stone or real planting in it. It reads as structural rather than decorative, so thirty strangers in a waiting area tend to receive it as part of the building rather than as somebody's choice. Tea Garden - jasmine, green tea and white tea, with the jasmine inside the tea rather than on top of it. The least risky floral in the collection, a step warmer than the two white-tea registers, and wanting a lower setting to match - and in a 51 cubic metre lounge that caution matters more than it would in a lobby.
Warm Welcome - citrus, floral and sandalwood. Warm and gracious, a genuine threshold register, and usable in a family-facing facility where warmth is honestly the positioning, run at a fraction of hotel level. Old-World Glamour - amber, violet and woods, plush and evening-elegant. A beautiful register and the wrong shape for this building, because plush in a clinical setting is precisely the character that reads as covering, and because it is an evening register in a building whose most important hour is seven in the morning. Lobby Bar - citrus, pepper and amber, bold and after-dark. No home in a day-care hospital at all, and turning it 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 - a different fragrance system rather than the same bottle in another size, and the ₹299 water-based bottle never goes into one. I 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, automatic-door traffic and setting swamp any difference between blends in a building nobody has stood in.
And the list that gets no register at any setting: the consulting rooms, pre-operative holding, the theatre, post-procedure recovery, the sterile and decontamination area, clinical and drug storage, and the clinical waste hold. That list is the specification, not a hedge, and your own clinical and infection-control leadership owns it and can extend it.
| Scent | Why it suits the mood |
|---|---|
| Entrance, reception and general waiting, 450 sq ft · scented, one volume | 120 x 12 = 1,440 cubic feet, about 41 cubic metres; 180 x 12 = 2,160, about 61; 150 x 12 = 1,800, about 51. Usually one open body of air totalling about 153 cubic metres. One Sukoon at ₹1,899 placed in the reception part rather than at the door, set for the family whose list has slipped by forty minutes rather than for the four-minute check-in. |
| Attendant and family lounge, 150 sq ft · scented, its own volume | 150 x 12 = 1,800 cubic feet, about 51 cubic metres, behind a real door. The most legitimately scentable room in the building, because an attendant sits for three to five hours with nothing to do and the air is a genuine part of their experience. A second Sukoon at ₹1,899, a Boond at ₹899, or a reed from ₹749 if there is no socket. Set for hour four. |
| Consulting rooms and pre-operative holding, 460 sq ft · nothing | 280 x 9 = 2,520 cubic feet, about 71 cubic metres of consulting; 180 x 10 = 1,800 cubic feet, about 51 cubic metres of pre-op. Consulting is off the plan because the door is shut and 36 cubic metres over-scents at any level that suits reception. Pre-op is off the plan because somebody fasting since midnight in a gown waiting to be called is not a person to be marketed at. |
| Theatre, recovery, sterile, stores and waste, 850 sq ft · nothing | 400 x 10 = 4,000 cubic feet, about 113 cubic metres of theatre; 250 x 10 = 2,500, about 71 of recovery; 100 x 10 = 1,000, about 28 sterile; 60 x 10 = 600, about 17 of clinical and drug store; 40 x 10 = 400, about 11 of waste hold. Nothing, in every one. Nominal building 680 cubic metres at 12 ft, minus all of the above and the 90 sq ft of staff areas and circulation, equals 204 cubic metres of public air. |
So the buying answer at 2,000 sq ft, with the arithmetic behind it rather than in front of it. Scented volume about 204 cubic metres, split into roughly 153 and 51. A SOSA Sukoon at ₹1,899 in the reception volume and a second Sukoon at ₹1,899, a Boond at ₹899 or a reed from ₹749 in the attendant lounge, all running one register from the water-based Hotel Collection at ₹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 choosing from a description; judge each on day five, not on the first afternoon. If the front of house runs all day and nobody wants to refill anything mid-list, a SOSA Megh at ₹3,499 and its 6 litre tank is the low-attention version of the same plan.
The SOSA Vaayu at ₹11,999 is roughly five times your total public air at this size, and your public air is two volumes rather than one, so capacity is not the argument for it here. Two things are. It is waterless cold-air nebulising of undiluted oil with no water, no humidity and no wet residue, which matters if your infection-control or engineering leads have ruled out a water tank in the public areas. And the Bluetooth app and timer mean scenting follows OPD hours rather than running overnight into a closed building. Approximately 1000 cubic metres of connected air, 400ml tank, freestanding or wall and HVAC mount, DC 12V / 1A at 5W and mains powered so it needs a live socket, CE, RoHS and SGS. 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, 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, into Aangan at ₹25,999 or into Meenar at ₹38,500. Those last two are ducted machines for approximately 8,000 to 10,000 and 12,000 to 18,000 sq ft respectively, they are not a 2,000 sq ft conversation, and in any healthcare building a scenting unit is never ducted into air handling that serves a clinical zone - which makes an HVAC machine a conversation only where the public areas sit on their own separate air handling, and that is a question for your facility's HVAC consultant.
If your facility is smaller and you want the same subtraction on a plan with one reception, read how to scent the reception of a 1,000 sq ft day-care centre. If the real question is whether you need a powered machine at all in a given room, the architecture comparison is in is a reed diffuser enough for a 1,500 sq ft private day-surgery facility. And at the next size up, where a Vaayu genuinely enters the conversation and where it still does not, see what scenting system makes sense for the public areas of a 3,000 sq ft surgical centre.
What SOSA does not publish and this page will not invent: consumption rate, refill frequency, monthly running cost, machine lifespan, minimum order or installation lead time. Those depend on run hours, connected volume and setting, so they are yours rather than ours. Send your plan, your ceiling heights, where the doors are and your fragrance-free zone list 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.