That needs explaining, because on paper recovery looks like just another room behind the clinical door, and if you have already read the procedure-room argument you might reasonably expect this page to repeat it. It does not, because recovery is a different physical problem with a different set of people in it, and three things about it combine in a way that nothing else in the building does.
One: it is where a person is least able to tell you anything. Not unable to leave, which is already true of a procedure room - unable to say. Somebody in early recovery is not going to summon a nurse to mention that the air smells of bergamot. The ordinary feedback loop that protects every other room in commercial scenting is simply absent.
Two: it is long, and it is shared. A procedure is measured in minutes. Recovery is frequently an hour or more, and it is very often a bay arrangement behind curtains rather than a set of closed rooms - which means one decision about the air applies to four or six people at once, none of whom chose it and none of whom can opt out of it individually.
Three: it sits immediately behind the busiest door in the clinical half. Trolleys in, trolleys out, staff in and out constantly, families brought through for discharge. That door is propped open more times in a day than any other door in your building, which makes recovery the zone most physically exposed to anything you put in the corridor outside it.
Longest stay, least voice, shared air, busiest door. Put those four together and you get the sentence this page exists for: recovery is the most protected air in a day-care hospital, and it is protected by giving it nothing.
Is a curtained recovery bay a separate air space? No. A curtain stops sight and a little sound. It does not end a body of air. Four curtained bays off one recovery floor are a single connected volume, so there is no such thing as scenting one bay and not another, and no individual in that space can be given different air from their neighbour. That is exactly why the decision has to be taken for the whole area at once, and why the correct decision for the whole area is nothing at all.
Where does the scenting machine go instead? In the public half, inside the volume it is meant to scent, facing into it and away from the clinical doorway - the entrance, reception and billing, and the attendant lounge. Never in the corridor that feeds the clinical door, never in front of a supply grille, never next to a return, and never ducted into air handling that serves a clinical area. A Sukoon at ₹1,899 with the water-based Hotel Collection from ₹299 covers a counter; the waterless Vaayu at ₹11,999 covers a larger connected front of house.
A procedure room is a small closed box with one door, its own supply and extraction, a very short list of people permitted inside it and a culture of shutting the door behind you. Physically and procedurally, it resists whatever is happening elsewhere in the building. A recovery area frequently has none of those defences. It is often an open floor divided by curtains or low screens, its doorway is the busiest threshold in the clinical half, its occupants are there for a long time, and the one person who might report a problem with the air is the least able person in the building to do so. It is the softest target in the clinical half and the reason it needs the firmest rule.
Take the duration first, because it changes the arithmetic of everything. A day-surgery procedure may be twenty minutes or forty. Recovery is frequently an hour and often longer, with a second-stage area after it where somebody sits, has something to drink and waits for an escort. In commercial scenting, exposure time is the single most underweighted variable there is. The level that is unremarkable for four minutes is noticeable at forty and can be wearing at two hours, which is exactly why I tell facilities to set the attendant lounge for the person at hour four rather than the person at minute three. Apply that logic to recovery and you run out of acceptable levels before you reach one, because the person there is not only staying longest - they are the one least able to do anything about it.
Then the bay. This is the structural fact that makes recovery different from every other room on the fragrance-free list, and it is worth doing the arithmetic. A four-bay recovery floor of 450 sq ft at a 10 ft ceiling is 450 x 10 = 4,500 cubic feet, and 4,500 / 35.3 is about 128 cubic metres. That is not four rooms of 32 cubic metres each. It is one room of 128 cubic metres with fabric in it. A six-bay area at 600 sq ft and the same height is 6,000 cubic feet, about 170 cubic metres, again as one connected volume. A curtain is not an air boundary. It stops sight, it takes the edge off sound, it does nothing whatsoever to a body of air. So there is no such thing as a per-bay decision, no such thing as a lower setting for the person who minds, and no such thing as an individual opting out. One decision covers everybody in the space, which means it has to be the decision that requires no consent from anybody. That decision is nothing.
Then the door. Recovery sits immediately behind the busiest threshold in the clinical half - trolleys through in both directions, staff in and out all day, and families walked through for discharge. It is the door most frequently held or propped open, and a propped door is not a leak, it is an opening. A 900 mm by 2,100 mm door leaf standing fully open is 0.9 x 2.1 = 1.89 square metres of aperture, which is 18,900 square centimetres. The undercut gap under the same door when it is shut - say 15 mm - is 90 cm x 1.5 cm = 135 square centimetres. Propping it open is therefore roughly 140 times the opening, and no machine setting compensates for that. If anything in your public half is loud enough to be detectable in the corridor, recovery is where it arrives.
And the plain fact that sits over all of it. Nausea after anaesthesia is ordinary and widely known. I state it as the plain fact it is, it is a straightforward reason those areas stay neutral, and I will not convert it into a claim in either direction - nothing here says a fragrance helps, relieves, worsens or causes it, and SOSA makes no such claim anywhere.
Above every one of those, the same governing point that belongs on every page in this bank: what may be introduced into the air of a building with a surgical zone is governed by the operator's own clinical leadership, its infection-control policy and its facilities engineering, and their decision overrides every recommendation here, including in the direction of being stricter. A portion of every SOSA order supports girl-child education through Nanhi Kali.
The reason I write this page separately from the procedure-room page is that facilities do not usually get recovery wrong deliberately. They get it wrong through drift. The procedure rooms are obviously untouchable and nobody would dream of it. Recovery, though, often looks like part of the soft side of the building - it has chairs, it sometimes has a window, families come into it, somebody brings tea. It starts to feel like a waiting area, and waiting areas are the kind of room where a well-meaning person puts a reed diffuser on a ledge because the shelf looked bare. That is how it happens, it happens in month seven rather than month one, and the person who does it is being kind rather than careless.
The defence against drift is not a memo. It is a list of named rooms on the same drawing that carries the scenting plan, with recovery, second-stage recovery and the discharge bay written out individually rather than covered by the phrase "clinical areas". Phrases get interpreted. Room names do not. And make the list part of the facility procedures rather than the knowledge of whoever hired the diffuser supplier, because that person will eventually leave and their successor will inherit a machine and no boundary.
The second thing worth saying is who your instrument is. Your recovery staff are the most useful measuring device you own, and they are underused. They are in that air for a full shift, they know exactly what their area normally smells like, and they will notice a change from the corridor faster than any visitor. Ask them directly, twice: once a fortnight after anything new is installed anywhere in the building, and once again in the first week of the monsoon, when a building that has been shut up and damp behaves completely differently. If they tell you something is reaching them, believe it immediately and go and look at the machine's position and the doorway rather than the dial. A report from that team is a measurement, not a complaint.
And the third, because it is the honest commercial note. None of this costs you anything you were going to earn. Nobody has ever chosen a day-surgery centre because of how its recovery bay smelled, and nobody ever will. The value of a register is collected at the threshold, at the counter and in the lounge where an attendant has been sitting since half past six. That is the half of the building you buy a machine for. Recovery is the half you buy a rule for, and the rule is free.
Why recovery is the most protected air in the building, and not simply another clinical room
This page has three factors and they build on each other rather than sitting side by side. The first is time and voice: how long somebody is in that air and what they can do about it, which is the ethical core of the argument. The second is the bay, which is the structural fact that makes recovery unlike any other room on the list - a shared volume with a fabric divider that does nothing to air. The third is the door and the corridor behind it, which is where the practical protection actually happens, and where the governing decision sits.
Before those, it is worth fixing what we mean by "recovery", because the word covers more than one space in most day-surgery buildings and the boundary has to include all of them. There is usually a first-stage area immediately off the procedure corridor, frequently a bay arrangement, where somebody is monitored closely. There is often a second-stage or step-down area with reclining chairs rather than trolleys, where people sit, have something to drink and wait for their escort. There may be a separate discharge bay or a small room where a family member is brought in for the discharge conversation. All of it is on the fragrance-free list. The second-stage area is the one that most often drifts, because it looks and behaves the most like a lounge, and it is the one to write out by name on the drawing.
The volumes involved are small, which is worth knowing for the same reason it was worth knowing for a procedure room: small volumes have nowhere to put anything. A four-bay recovery floor of 450 sq ft at a 10 ft ceiling is 4,500 cubic feet, about 128 cubic metres. A six-bay area of 600 sq ft at 10 ft is 6,000 cubic feet, about 170 cubic metres. A second-stage room of 300 sq ft at 10 ft is 3,000 cubic feet, about 85 cubic metres. Compare those with the public half you are actually buying for: a 1,000 sq ft lobby at 12 ft is 12,000 cubic feet, about 340 cubic metres, and a 1,500 sq ft connected front of house at 12 ft is 18,000 cubic feet, about 510 cubic metres. The clinical spaces are a fraction of the air and they are the fraction with all the constraints on it.
And one thing I will not do on this page, which is the discipline the whole section runs on. I am not going to explain to you why recovery is a sensitive environment in any physiological sense, because that is not my subject, I am not qualified to describe it and the moment a fragrance house starts explaining clinical matters it has begun making claims it cannot support. I am going to describe a room, its air, its doors and the people in it. That is enough to get to the right answer, and it gets there without a single sentence anybody could misuse.
Start with duration, because it sets the scale. Exposure time is the most underweighted variable in this trade. A level that nobody registers in a four-minute walk-through is noticeable at forty minutes and becomes wearing at two hours - which is precisely why I tell facilities to set an attendant lounge for the family member at hour four rather than the visitor at minute three, and why a lobby that feels perfect to a director doing a thirty-second lap is usually running at double what a seated person can take. A day-surgery procedure may take twenty or forty minutes. First-stage recovery is frequently an hour, second-stage adds more, and somebody waiting for an escort who is stuck in traffic can be in that area for a good part of the morning. On duration alone, recovery is the longest continuous exposure anybody has in the clinical half of your building.
Now add the second absence, which is the one that actually decides the page. In a lounge, if the register is too much, somebody eventually mentions it - to the desk, to a nurse, to a colleague, in a review, to their sister in the car afterwards. That feedback is the mechanism by which over-scented commercial spaces get corrected, and it is why I keep saying that a reported sensitivity is a recalibration signal rather than a tolerance problem. In recovery that mechanism does not operate. Somebody in early recovery is not going to raise a hand to discuss the ambient fragrance, and nobody should expect them to. The room has no feedback loop.
That matters more than it sounds. It means that if you got it wrong in a recovery area, you would not find out. There would be no complaint, no review, no quiet word at the desk. The error would simply persist, invisibly, for as long as the machine ran. Everywhere else in commercial scenting, being slightly too loud is a self-correcting mistake. Here it is a silent one. When a decision cannot be checked by the people it affects, the correct setting is the one that requires no checking - and that is zero.
There is a third absence worth naming, and it belongs to the people rather than the room. Somebody in recovery did not walk into your building to evaluate it. They are not a visitor forming an impression, not a family member with three hours to spend looking at your walls, not a customer at any point in this. They are a person part-way through something. Whatever ambient scent is for - and I hold to a modest view of that, which is improved evaluations of a space and its service, longer dwell and stronger recall at moderate effect sizes - none of it applies to this room or this moment. There is no evaluation being made here that you would want to influence, and no reason to be in the air at all.
And the plain fact that everybody working in a day-surgery building already knows: nausea after anaesthesia is ordinary and widely known, and recovery is where people experience it. I state that as the fact it is, and as a perfectly sufficient reason for the area to stay neutral. I am not saying a fragrance helps it, relieves it, worsens it or causes it - no such claim is made by SOSA, none is available to me, and I would not make one if it were. It is a feature of the day in your building, it is well known, and it is reason enough on its own without a word of elaboration.
Most private day-surgery centres do not recover people in individual closed rooms. They recover them in an open area divided into bays by curtains on ceiling tracks, sometimes with low screens or partial partitions, with a staff station positioned so that several bays can be observed at once. That arrangement exists for good operational reasons that have nothing to do with fragrance, and it is not going to change. But it has one consequence that is entirely my subject: it is a single body of air with fabric in it.
Do the numbers, because they make it concrete. A four-bay recovery floor of 450 sq ft at a 10 ft ceiling is 450 x 10 = 4,500 cubic feet, and 4,500 / 35.3 is about 128 cubic metres. It is tempting to divide that by four and think of each bay as a 32 cubic metre space, and that is exactly the mistake. There are no four spaces. There is one space of 128 cubic metres, and drawing a curtain across part of it changes nothing about where the air goes. A six-bay area at 600 sq ft and 10 ft is 6,000 cubic feet, about 170 cubic metres, again as one volume. Add a second-stage room of 300 sq ft at 10 ft - 3,000 cubic feet, about 85 cubic metres - and if the doorway between them stays open, which it usually does, you have roughly 255 cubic metres of connected air serving six to ten people at a time.
The consequences run in a straight line and they are all one-directional.
There is no per-bay decision. You cannot scent bay three and leave bay four alone. Whatever is in that air is in everybody's air.
There is no individual opt-out. In a lobby, the standing SOSA arrangement is that anybody on the desk can switch off a named unit for a named visitor without asking a manager, and that is a real and useful accommodation. In a shared recovery area there is no equivalent: switching off would mean switching off for everybody, and the air already in the room takes time to change regardless. The accommodation that works in a public space is structurally unavailable here.
There is no consent that covers everyone. One decision applies to four or six or ten people simultaneously, none of whom were asked, several of whom will change over during the course of a morning as the list runs. Any decision that has to be made collectively for people who cannot be consulted should default to the option that needs no consent. That is the option where nothing has been added.
And say the sentence plainly, because a surprising number of otherwise careful plans depend on the opposite being true: a curtain is not an air boundary. A closed door ends one connected body of air and begins another - that is the mechanism this entire bank rests on, it is what makes a scented lobby and a neutral surgical zone a design rather than a fudge, and it works because a door is a physical seal in a wall. Fabric on a track is not a seal. It stops sight and takes the edge off sound. Air does not notice it. The same is true of a low screen, a glazed partition that stops short of the ceiling, a beaded divider and an open doorway with no leaf in it. If you can walk through it without opening anything, it is not a boundary.
That has one more implication that belongs here rather than on the mechanism page. Because a bay area is one volume with an open or frequently-used doorway, it is effectively continuous with the corridor outside it for much of the day. So the question "is recovery fragrance-free?" is not answered by the absence of a machine inside it. It is answered by the absence of a machine anywhere that connects to it - which in practice means the corridor, the sub-waiting area, the staff base and anywhere else on that side of the last real door. Nothing in the zone means nothing in the zone's air, and the zone's air is bigger than the room.
Count the traffic through the door that serves your recovery area over a single morning list. Patients through on trolleys or walking, one at a time, in one direction. Patients out again, in the other. Clinical staff in and out continuously - handovers, observations, notes, supplies. Housekeeping. A family member walked through for a discharge conversation and walked back out again. On a twelve-case list that is a threshold being used dozens of times before lunch, and it is almost certainly the most heavily used internal door in your building.
Doors that are used that heavily do not stay shut. They get held. They get propped - with a wedge, a bin, a chair - because somebody is bringing a trolley through and will be back in ninety seconds, and then the ninety seconds becomes ten minutes because something else happened. This is not a criticism of anybody. It is the ordinary reality of moving people and equipment through a building, and no fragrance policy is going to change it. What it means is that the closed-door mechanism the whole scenting plan depends on is switched off, repeatedly, at exactly the door that matters most.
The arithmetic is worth doing once because it is startling. Take a single 900 mm by 2,100 mm door leaf. Shut, with a typical 15 mm undercut, the permanent opening underneath it is 90 cm x 1.5 cm = 135 square centimetres - a little smaller than a postcard, and a real path that this section's mechanism page deals with in detail. The same leaf standing fully open is 0.9 m x 2.1 m = 1.89 square metres, which is 18,900 square centimetres. Propping the door is therefore about 140 times the aperture of leaving it shut. There is no setting on any machine that compensates for a 140-fold change in the size of the hole, and anybody who tells you their unit is "calibrated" for that is selling you something that does not exist.
So the protection for recovery is not a number on a dial. It is distance and placement, decided once and written down.
Put the machine inside the volume you actually intend to scent - the lobby, the reception area, the attendant lounge - facing into that volume, and as far from the clinical doorway as the room allows. Never put a unit in the corridor that leads to the clinical half, however convenient the socket is. A corridor is a fifteen-second space that connects everything to everything, it commonly behaves as a plenum between areas that look separate on a drawing, and a machine standing in one is aiming at a door rather than filling a room. Never stand a unit directly in a supply airstream, because that hands your placement decision to the air handling. Keep it away from return grilles, which will quietly remove your fragrance from the room you meant to fill and may deliver it somewhere else through a ceiling void. And a scenting unit is never ducted into, or placed inside, air handling that serves a clinical area - not at a low setting, not on a timer, not ever. Whether a single air handler serves both halves of your building is an engineering question with an engineering answer, and it belongs to your own HVAC consultant rather than to a fragrance page.
Then check it the only way that works, which is with a nose that has not been in the building. Adaptation happens within minutes and it is completely ordinary; the person best placed to judge whether the corridor smells of the lobby is the person who has just walked in off the street. Do the walk from the lobby inward, and then do it again in reverse, because the two directions genuinely tell you different things.
And the decision that outranks all of this. What may be introduced into the air of a building containing a surgical zone is governed by the operator's own clinical leadership, its infection-control policy and its facilities engineering. Take them the marked plan, the ceiling heights, the proposed machine position and the fragrance-free room list before anything is bought, get the answer in writing, and treat it as final in both directions - including when it is stricter than this page, and including when it is no. 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.
- Write recovery, second-stage and the discharge bay on the drawing by name.
- Treat the whole bay area as one volume - a curtain is not an air boundary.
- Keep every machine out of the corridor that feeds the busiest clinical door.
- Ask your recovery staff what reaches them before you touch any setting.
What the recovery boundary means for where the machine can actually stand
Since recovery gets no register at all, the useful question becomes which register the public half runs and - far more importantly for this page - where the machine producing it is allowed to stand.
The register first, briefly. There are seven in the water-based Hotel Collection, each SOSA's own hotel-inspired interpretation; SOSA is independent and is not affiliated with, endorsed by or connected to any hotel brand. In a clinical building the filter runs before taste: clean and unsweet. White Tea Serenity - white tea, aloe and cedar, clean, weightless and spa-like - and Quiet Luxury - white tea, bergamot and cedar, hushed and polished - are the two natural answers, and both let a room read as considered rather than as scented. Forest Suite - cedarwood, vetiver and green leaves - is the third, and the right one where the fit-out is timber, stone or planted. Tea Garden - jasmine, green tea and white tea - is the least risky floral, a step warmer, and wants a lower setting. Warm Welcome - citrus, floral and sandalwood - works in a family-facing neighbourhood facility at a fraction of hotel level. Old-World Glamour - amber, violet and woods - is plush, and plush in a clinical building reads as covering something. Lobby Bar - citrus, pepper and amber - has no home here at all. I will not rank the seven on measured throw or longevity: SOSA does not publish that, and volume, height, ventilation, door traffic and setting swamp any difference between blends.
Now the part that matters for recovery. Placement is the protection. Here is the order I would work in.
Find the last real door. Walk from your lobby toward the clinical half and identify the last door that actually closes and is expected to stay closed. That door, not the sign on the wall, is the edge of your scented volume. Everything on the far side of it is the fragrance-free zone, and that includes the corridor, the sub-waiting area, the staff base and anything else that shares air with recovery.
Put the unit in the room, not the route. Inside the lobby, reception or lounge volume, facing into the room, standing away from the doorway that leads toward the clinical half. Not in a corridor. Not on a landing. Not in a lift lobby that serves both halves. The socket is not a reason.
Check what the air handling is doing where you have put it. A unit standing in a supply airstream has had its placement decided for it by the ductwork, and where that airstream goes is where your fragrance goes. A unit near a return grille is feeding a ceiling void, and a ceiling void can connect two rooms that look entirely separate on a drawing. Both of those are questions for your own facilities engineers rather than for a page, and both are worth ten minutes of somebody's time before anything is drilled.
Never duct into clinical air handling. A scenting unit is never ducted into, or placed inside, air handling that serves a clinical area, at any setting. The ducted machines - Aangan at ₹25,999 and Meenar at ₹38,500 - are HVAC decisions taken with your own consultant for the public side of a building, and in a facility with a surgical zone that conversation begins with which handler serves what.
Then set the level for the coldest reading of the week - the first arrival on a Monday morning into a building shut since Saturday - write the register and the number on a card taped to the machine, and leave it alone for a fortnight. And remember the one rule that never bends in a healthcare building: you never reduce air exchange, close a vent or turn down extraction so that fragrance lasts longer. A well-ventilated lobby is genuinely harder to scent, and the honest answer to that is placement, correct sizing and patience, never less air.
| Scent | Why it suits the mood |
|---|---|
| First-stage recovery bays · nothing at all | One connected volume regardless of how many curtains are in it - a 450 sq ft area at 10 ft is 4,500 cubic feet, about 128 cubic metres, shared by everybody in it. No per-bay decision exists, no individual opt-out exists, and the person there is the least able in the building to say anything about the air. Nothing, and write it on the drawing by name. |
| Second-stage and discharge areas · nothing, and this is the one that drifts | Reclining chairs, a window, somebody bringing tea, a family member coming through - it starts to look like a lounge, and a lounge is where somebody eventually puts a reed on a ledge because the shelf looked bare. It is not a lounge. Name it on the fragrance-free list separately rather than letting the phrase clinical areas cover it. |
| The clinical corridor and staff base · nothing, and no machine anywhere near | Nothing in the zone means nothing in the zone's air, and the zone's air is larger than the room. A corridor behaves as a connector and often as a plenum, the recovery door is the busiest in the building and gets propped for trolleys, and a machine standing in that corridor is aiming at an opening rather than filling a room. |
| Entrance, reception and attendant lounge · one register, one level | White Tea Serenity or Quiet Luxury from the water-based Hotel Collection, held low and held the same across all three so the public half reads as one house character. Unit inside the room, facing in, away from the clinical doorway, away from supply and return grilles, and set for the family at hour four rather than the visitor at minute three. |
So what do you actually buy, given that the machine has to live in the public half and stay well away from the busiest clinical door?
For a single reception counter and a normal waiting area, an ultrasonic is usually the whole purchase: the SOSA Boond at ₹899 for a small enclosed desk, or the SOSA Sukoon at ₹1,899 for a 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 lets you audition registers in your own lobby air over five days each rather than choosing from a description. For an attendant lounge running from seven in the morning to eight at night, the SOSA Megh at ₹3,499 with its 6 litre tank means nobody is refilling at lunchtime.
For a larger connected front of house, the waterless SOSA Vaayu at ₹11,999 is the commercial answer, and in a building with a recovery area its defining argument is what it does not do: cold-air nebulising of undiluted oil means no water, no humidity and no wet residue anywhere in the facility. That is why a day-surgery operator will consider it when they will not consider a tank. It is rated for approximately 1000 cubic metres of connected air - SOSA's own copy also states 2,000 to 3,000 sq ft scented evenly - 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 earn their place here: you scent OPD hours only, so the lobby is right when the first list arrives and the machine is not running at three in the morning into a closed building. It is an ambient fragrance product for public areas, not a medical device, not an infection-control or air-treatment device and not validated for clinical use.
Two systems, and they are not interchangeable. The ultrasonics are water-based cool-mist machines; the Vaayu and the ducted machines - 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, and the ₹299 water-based bottle never goes into a Vaayu or an HVAC machine.
If you would rather have no plug, no noise and nothing to switch off at a small desk, the SOSA reed diffusers are their own registers from ₹749 and last about 6 to 10 weeks: Mountain Breeze at ₹849 is Himalayan pine, sage and cedar and sits closest to a healthcare desk, Morning Freshness at ₹749 is Malabar lemon, mint and eucalyptus, Garden Bloom at ₹799 is British rose and night-blooming jasmine, Evening Calm at ₹799 is Kashmir lavender and chamomile, and Fresh Brew at ₹849 is Coorg coffee and Kerala vanilla, which is the wrong shape at a hospital desk. The 130ml is from ₹1,249, with 300ml refills at ₹2,399 and 500ml at ₹3,499. And a reed belongs at a desk rather than anywhere near a clinical door: it is a low, local thing that does not cross a lobby, which in this building is a feature.
Elsewhere in this section: the procedure-room version of the argument, and why the facility loses nothing commercially, is in should day-surgery procedure rooms be fragrance-free. The worked volume arithmetic showing that a scented lobby and a wholly neutral surgical zone is a design rather than a compromise is in can I scent reception while keeping the entire surgical zone neutral. And the leak paths in the order you check them, including the undercut and the propped door, are in how to prevent lobby fragrance from travelling into procedure 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. Those depend on run hours, connected volume and setting. Talk them through with your plan in hand 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.