That is a more useful answer than it first looks, because the question almost always arrives in the wrong shape. A facility director asks it meaning "should the family lounge get something warmer and the patient area something more clinical", and the honest reply is that a building with two characters in it does not read as two thoughtful rooms. It reads as a seam. And the seam is not felt in either room. It is felt in the corridor between them, in the six or eight steps a person takes from one to the other, which is the only place in the building where both characters exist at once and the only place where the change is available to be noticed.
What genuinely separates the two rooms is not character at all. It is dwell and proximity to the clinical boundary. An attendant sits in the family lounge for three to five hours with nothing to do; that is the longest occupancy of any room in your building and it makes the lounge the most legitimately scentable room in a day-care hospital. A patient waiting to be called has often already begun the clinical pathway, and the room they are in is frequently inside the air boundary; that makes it the least appropriate room in the building. Same building, opposite answers, and neither answer is about which fragrance smells nicer.
So this page does three things. It explains the seam and why two registers in one connected public half is a false economy of thought. It sets out what "differently" can legitimately mean - level, hours, and whether the room runs at all. And it is honest that the commonest correct configuration in an Indian day-surgery centre is one scented room and everything else at zero, which is a smaller purchase than the reader came for. As always, what may be introduced into the air of a building with a surgical zone is decided by your own clinical leadership, infection-control policy and facilities engineers, and their decision overrides every recommendation here.
Why not give the family lounge its own signature scent? Because a corridor is a shared room. Somebody walking from the lounge to the desk passes through the place where both characters are present, and a change of character in eight steps reads as improvisation rather than as design. There is also an operational cost that nobody prices at the quotation stage: two bottles, two settings, two things to write down and two things to drift. Where a family lounge genuinely is a separate connected body of air behind a door that stays shut, a distinct register becomes possible - but consistency is still usually the better answer.
Which of the two rooms should be scented if I can only do one? The attendant or family lounge, without hesitation. It holds the same people for three to five hours with nothing to do, nobody in it has begun a clinical pathway, and it is usually furthest from the clinical boundary. A 500 sq ft lounge at a 12 ft ceiling is 6,000 cubic feet, about 170 cubic metres, which a SOSA Sukoon at ₹1,899 with the water-based Hotel Collection from ₹299 will hold comfortably at a low level.
Take them in order. The level differs because the rooms differ physically and by occupancy. A family lounge is a long-dwell room, so it is set for the person at hour four rather than the person at minute three, and that produces a lower number than instinct suggests. A public patient waiting area attached to reception is a shorter-dwell room with more traffic through it, and it inherits the front-of-house level rather than getting one of its own. Neither of those is a big number. The gap between them is small, and it is smaller than most people expect, because the long-dwell room is the one that wants less, not more.
The hours differ because the rooms fill at different times. A family lounge is occupied from the moment the first list starts until the last discharge, and it is empty overnight. A consultation waiting area follows OPD hours. Scheduling each to its own occupancy is a legitimate use of the Bluetooth app and timer on the SOSA Vaayu at ₹11,999, and the point of it is not to save fragrance. It is that a machine running at three in the morning into a closed building is producing a level nobody set, which the first person through the door in the morning will meet at full strength.
And whether the room runs at all differs, which is the honest heart of this page. In most Indian day-surgery centres the patient-facing waiting is either a public consultation waiting room that simply inherits the reception register, or a pre-operative holding area that gets nothing. There is rarely a third case that needs a bespoke answer. So the configuration you most often end up with is: reception and family lounge on one register at low levels, holding areas and the entire clinical half at zero, and a fragrance-free room list written on the drawing by name. That is one decision, not two, and it is the version that still looks right in year three.
What should never differ is the character, and it is worth being concrete about why rather than asserting it. Character is the thing a returning visitor recognises. A family who came for a pre-operative consultation in March and returns for the procedure in September meets the building twice, and the thing that makes those two visits feel like one place is that the air was the same. Split the building into two characters and you have not doubled the identity, you have halved it, because neither half is now the identity of the building. And you have introduced a seam that anybody walking the corridor will pass through several times a day.
One final point that belongs in the straight answer rather than in a footnote, because it is the reason the family lounge deserves the attention at all. The attendant is the one person in your building whose entire experience of your facility is the room. They are not being treated, they are not being consulted, they are not being examined. They sat down at half past six in the morning and they are still there at eleven. Whatever that room provides - the chair, the light, the noise level, somewhere to put a bag, and the air - is the whole of what your facility gave them. That is why the lounge is the legitimate room, and it is also why the lounge is the room where an over-scented level does the most damage, because they cannot leave it. A portion of every SOSA order supports girl-child education through Nanhi Kali.
The fastest way to convince yourself is to walk it. Stand in the family lounge for two minutes, then walk to the patient waiting area at the pace an ordinary person walks, and pay attention to the middle of that journey rather than to either end. That middle is a corridor, a lobby edge or a doorway, and it is where the two volumes meet. If the two rooms carry different characters, the middle is where you will find a third thing that nobody designed, made of both of them, which is present for as long as it takes to walk through and then gone. Nobody will ever compliment it. Some people will register it as the building being slightly unresolved, and none of them will be able to tell you why.
There is an operational cost too, and it is the kind nobody prices at the quotation stage. Two registers means two bottles in the store cupboard, two settings on two machines, two things on the card taped to the wall and two opportunities for somebody to refill the wrong unit with the wrong thing at eight o'clock on a Monday morning. Every extra variable in a scenting plan is a thing that drifts, and drift in this category is always upward.
The exception worth naming honestly, because it exists and the next page in this section is about it: where the family lounge is a genuinely separate connected body of air behind a door that stays shut, a distinct register becomes physically possible. That is a real design, not a fudge. Whether it is a good idea is a different question from whether it is possible, and my answer is usually still no for the seam reason, with one exception - a facility whose family lounge is a properly separate premium room, entered from its own door, that nobody passes through on the way to anywhere else. Then there is no corridor in which to feel the seam, and the argument against falls away.
And the standing arrangement that applies to both rooms: anybody on the desk can switch a named unit off for the rest of the day without finding a manager. In a family lounge that matters more than anywhere else in the building, because the person who would like it off has been sitting in it for four hours and is the least likely to walk to the desk and ask.
Why two registers in one building read as a seam, and where the seam is felt
Three things decide how these two rooms should differ, and none of them is a question of taste. The first is the seam - what a change of character actually does to a building, and where it is perceived. The second is dwell, which is the real and large difference between the two rooms and which points in the opposite direction to most people's instinct. The third is proximity to the clinical boundary, which is what usually turns the patient-side answer into zero and therefore dissolves the original question.
It is worth putting numbers on the two rooms, because they are usually different sizes and the arithmetic changes the purchase. In the centres I have walked, a family or attendant lounge runs from about 400 to 800 sq ft with a 10 to 12 ft ceiling. A 400 sq ft lounge at 10 ft is 400 x 10 = 4,000 cubic feet, and 4,000 divided by 35.3 is about 113 cubic metres. A 500 sq ft lounge at 12 ft is 6,000 cubic feet, about 170 cubic metres. An 800 sq ft lounge at 12 ft is 9,600 cubic feet, about 272 cubic metres. Patient waiting is typically smaller: 300 sq ft at 10 ft is 3,000 cubic feet, about 85 cubic metres, and a pre-operative holding bay at 200 sq ft and 9 ft is 1,800 cubic feet, about 51 cubic metres.
Those numbers tell you something before any question of character arises. If the two rooms are open to each other - and in a lot of compact day-surgery centres they are, separated by a half-height partition or a planter rather than a door - then they are one connected body of air and the question of scenting them differently does not arise at all. You cannot run two registers in one volume; you run one, and the two ends of the room simply receive it at slightly different intensities depending on where the unit stands. A 500 sq ft lounge and a 300 sq ft waiting area open to each other at 12 ft is 800 x 12 = 9,600 cubic feet, about 272 cubic metres, and that is a single scenting decision whatever the drawing says.
Which leaves the case where they genuinely are separate volumes behind a door. That case is real, it is the subject of the mechanism page in this section, and it is the only case where "scented differently" is a physical possibility rather than a wish. Even there, the recommendation below is one register at two levels, for reasons that are about how buildings are read rather than about what machines can do.
Consider what actually happens. A person sits in the family lounge for an hour. Their nose has long since stopped reporting whatever is in that room, which is ordinary and happens within minutes. They get up to go to the desk, or to find a bathroom, or to take a call outside. They walk down a corridor. Halfway along it the character changes - not dramatically, because both levels are low, but detectably, because a change is always more detectable than a state. They arrive at the patient waiting area and their nose reports the new character for perhaps ninety seconds before adapting again. Then they walk back, and the whole thing happens in reverse.
Nothing about that experience is pleasant, unpleasant or memorable. What it is, is incoherent, and incoherence is the specific thing a premium building cannot afford. The reason you scent a public half at all is that a single held character makes a set of rooms read as one considered place. Two characters do the opposite, and they do it while costing twice as much and requiring twice as much administration.
There is a version of the mistake that is even more common and more expensive, and it is worth naming because it is not really a design decision at all. A facility buys one machine for reception, likes it, and six months later buys a second machine for the lounge in a different register, because the person making the second decision was not the person who made the first and nobody wrote the first one down. That is not two registers by design. That is one register plus an accident, and it is why the card taped to the machine with the register name and the setting number on it is the cheapest piece of governance in this category.
Now the honest exception. If the family lounge is a genuinely separate connected volume - its own door, its own entrance, not a space anybody passes through on the way to somewhere else - then there is no corridor in which the seam can be felt, and a distinct register is a legitimate design rather than an accident. That is a real configuration in premium facilities and it is the subject of the mechanism page in this section. Even then, ask what the second register is buying you. If the answer is "the lounge feels special", check whether a different chair, better light or an acoustic treatment would do that more decisively for the same money. It usually would.
And the practical consequence for a multi-site group, which is where this compounds: the more registers you allow per building, the less chance you have of holding one character across three buildings. A facility that runs one register everywhere has a house character. A facility that runs two has an inconsistency it has to explain to every new manager.
The attendant or family lounge holds the same human beings for three to five hours. That is the longest continuous occupancy of any room in a day-care hospital, longer than the patient spends anywhere, longer than most staff spend in any single space. A patient waiting area attached to reception holds people for something between four minutes and, on a bad list day, two hours, and the population turns over constantly. That is the whole of the difference, and everything else follows from it.
Most people's instinct is that the long-dwell room is the one to make more of - it is where people spend the time, so it should carry more of the identity. Reverse that. A level that is agreeable at minute ten is tiring at hour four at the same intensity, because the level did not change but the exposure did. So the long-dwell room is set lower than the short-dwell room, and the correct setting for a family lounge is one that is close to imperceptible when you walk in through the door. That feels wrong for a fortnight and then stops feeling like anything at all, which is exactly the target.
The corollary is that the family lounge is the room where over-scenting does the most damage, and it does it in a specific and quiet way. A visitor in a lobby who finds the air too much walks out of the lobby in forty seconds. An attendant in your family lounge cannot leave: their relative is in theatre, the discharge conversation will happen in that room, their bag is on the chair, and they have three hours to go. They will not come to the desk and complain, because complaining about the air while somebody they love is in an operating theatre is not a thing most people do. So the feedback loop that protects you in a shop does not operate here, and you have to substitute a deliberate one - ask, on a normal day, somebody who has been sitting there two hours, and ask them before you tell them there is a diffuser in the room.
The second consequence of dwell is who else is in the room. A family lounge accumulates: food brought from outside, wet umbrellas in the monsoon, bags, coats, the upholstery that has been absorbing all of it for three years. Soft furnishing is the most under-appreciated reservoir in a hospital, and in a long-dwell room it is working hardest. If a lounge smells of something you would rather it did not, the answer is laundering, cleaning and ventilation, in that order, because fragrance adds scent and never removes odour. A register laid over a saturated sofa produces two smells, not one, and the second one is the one people will remember.
And the last consequence is the one facilities like least. If the family lounge is the room that matters most, then the money should go there first and not to the entrance. An entrance is a threshold that people pass through in seconds, with automatic doors exchanging its air continuously, and it is the hardest room in the building to hold and the easiest to over-dose. If you can only treat one room, treat the lounge, and leave the entrance alone entirely.
Run the test from the first page in this section. Has the person in that room already begun the clinical pathway - admitted to a list, wristbanded, changed, cannulated, marked? And is the room inside the air boundary between the public and clinical halves of the building? If either answer is yes, the room gets nothing, and "scented differently" collapses into "one scented, one not".
In practice, one of three configurations describes almost every centre I have walked. In the first, the patient waiting area is a public consultation waiting room that opens directly off reception, in which case it is not really a separate scenting decision at all - it is part of the reception volume and it inherits the reception register at the reception level. In the second, the patient waiting is a pre-operative holding area behind the clinical door, in which case it gets nothing and the only scented rooms in the building are reception and the family lounge. In the third, it is a room that does both jobs at different hours, in which case it also gets nothing, because a setting somebody has to remember to switch off will be running on the morning they forget.
Notice that in all three configurations the answer to the page's question is the same: one register, and the difference between the rooms is level or zero. There is no configuration in which two characters is the right answer to a difference in room type, which is why the original question is best answered by replacing it.
The physical half of the boundary question deserves its own paragraph because it is where plans fail. A family lounge that is scented and a holding area that is not are only genuinely separate if the air is separate, and air is separated by doors that stay shut and by air handling that does not join them. The four things to check, all of them physical and none of them olfactory: the door undercut between the two spaces, a shared return grille serving both, a corridor acting as a plenum between them, and a unit standing in a supply airstream so that it is feeding a duct rather than scenting a room. All four are questions for your own facilities engineers and HVAC consultant rather than for a page, and a scenting unit is never ducted into air handling that serves a clinical zone.
Verify with a walk rather than a drawing. Run the lounge at its intended level for a full day, then bring in somebody who has not been in the building, and have them walk from the lounge toward the clinical boundary and stand at the closed door. If they detect anything, you have a leak path, and the response is to move the unit and re-test. It is never to reduce ventilation, close a vent or alter extraction so the fragrance behaves better - in a healthcare building that is the worst trade available and your engineers would be right to refuse it.
And the room list that never varies, in any facility, at any price: pre-operative areas and holding bays, procedure and operating rooms, post-procedure and post-anaesthesia recovery, sterile and decontamination areas, clinical and drug storage, and clinical waste. Nothing. Not a lower setting. Your clinical, infection-control and engineering leadership own that list, they can extend it, and if they decide the family lounge should be unscented too, that is a complete and legitimate answer.
- Check first whether the two rooms are actually one connected volume.
- Choose one register for the whole public half and write it on a card.
- Set the family lounge for hour four and let reception keep its own level.
- Put the patient holding area at zero and name it on the drawing.
One register, two levels, and the room that is usually at zero
If the answer is one register across the public half, then the choice is made once and it has to work in two quite different rooms: a reception with automatic doors and constant traffic, and a lounge where the same people sit for four hours. That is a real constraint and it narrows the field usefully.
The seven registers of the water-based Hotel Collection are 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 building that has to hold one character in both rooms, the shortlist is the cool, dry, unsweet end. White Tea Serenity - white tea, aloe and cedar - is clean, weightless and spa-like, and it is the register that most naturally reads as clean rather than as scented, which is the distinction a healthcare building is trying to make. Quiet Luxury - white tea, bergamot and cedar - is hushed and polished, with a little more lift at a threshold, which makes it the better single answer where reception is the larger and busier of the two rooms. Forest Suite - cedarwood, vetiver and green leaves - is grounding and green, reads as structural rather than decorative, and is the right answer where the fit-out is stone, timber or planted.
The four-hour test is what eliminates the rest. Tea Garden - jasmine, green tea and white tea - is the least risky floral in the collection and it is genuinely lovely in a reception, but a jasmine-inflected register in a closed lounge for four hours is asking more of the room than it is asking of the desk, so if you run it, run it at a distinctly lower level in the lounge than in the reception. Warm Welcome - citrus, floral and sandalwood - is a threshold register by design, and a threshold register in a long-dwell room is the wrong tool: it does its work in the first ten seconds, and the lounge is a four-hour room.
Old-World Glamour - amber, violet and woods - and Lobby Bar - citrus, pepper and amber - do not belong in either of these rooms. Plush in a clinical building is the character that reads as covering something, and an after-dark register in a family lounge at half past seven in the morning is theatrical in a room where nobody is looking for theatre. Neither is a criticism of the blends; both are statements about the room.
Now the two levels. Set the family lounge for the person at hour four, which in practice means you should have to look for it from the doorway. Set reception for the long tail of its own dwell, which is the family whose list has slipped and who has been at the counter for forty minutes rather than the one checking in for four. The two numbers will be close, and the lounge number will usually be the lower of the two despite being the more important room. If your lounge setting is higher than your reception setting, something has gone wrong in the reasoning and it is worth going back.
And the list that gets no register at all: pre-operative areas and holding bays, 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, named on the drawing so nobody adds anything in month seven.
| Scent | Why it suits the mood |
|---|---|
| One register, two levels · the right answer | The same character across the whole public half, set lower in the long-dwell family lounge and at the front-of-house level in reception. No seam in the corridor, one bottle in the cupboard, one number on the card, and a house character that a returning family meets twice and recognises. This is the configuration that still looks right in year three. |
| Two registers, one per room · the seam | Warmer in the lounge, cooler in the patient area. It sounds considered and it reads as improvised, because the change is perceived in the corridor between the rooms rather than in either of them. It also doubles the bottles, the settings and the number of things that can drift, and drift in this category is always upward. |
| One scented room, everything else at zero · the commonest correct answer | The family lounge carries a low register and the patient holding area carries nothing, because the pathway has begun or the room is inside the air boundary. Most Indian day-surgery layouts land here once the test is applied honestly, and it is a smaller purchase than most facilities arrive expecting. |
| A stronger register in the lounge because people are there longer · backwards | The instinct is understandable and it is the wrong way round. A level that is agreeable at minute ten is tiring at hour four at the same intensity, so the long-dwell room is set lower rather than higher. An attendant cannot leave the room, will not come to the desk to say so, and is the person your setting has to be right for. |
The buying answer follows the arithmetic, so do the arithmetic first. If the lounge and the waiting area are open to each other, they are one volume: a 500 sq ft lounge plus a 300 sq ft waiting area at a 12 ft ceiling is 800 x 12 = 9,600 cubic feet, about 272 cubic metres, and that is one machine and one decision. If they are separate rooms behind a door, price them separately: a 500 sq ft lounge at 12 ft is 6,000 cubic feet, about 170 cubic metres, and a 400 sq ft lounge at 10 ft is 4,000 cubic feet, about 113 cubic metres.
At those volumes a single ultrasonic is usually the whole purchase. The SOSA Sukoon at ₹1,899 suits a normal family lounge, the SOSA Boond at ₹899 suits a small enclosed waiting corner, and both run 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 air rather than from a description. A lounge that runs from six in the morning until the last discharge is the case for the SOSA Megh at ₹3,499, whose 6 litre tank means nobody is refilling a machine in a room full of waiting families at lunchtime.
Where the public half is large and genuinely connected, the waterless SOSA Vaayu at ₹11,999 is the commercial answer, and one Vaayu holding one register across a connected reception and lounge is the cleanest way to avoid the seam entirely. It is rated for approximately 1000 cubic metres of connected air, with SOSA's own copy also stating 2,000 to 3,000 sq ft scented evenly; it is waterless cold-air nebulising of undiluted oil, so no water, no humidity and no wet residue, which is why a facility with a surgical zone will consider it where it will not consider a tank. Bluetooth app and timer, 400ml tank, freestanding or wall and HVAC mount, DC 12V / 1A at 5W so it needs a live socket, CE, RoHS and SGS. Two systems and they are not interchangeable: the ₹299 water-based bottle never goes into a Vaayu, or into Aangan at ₹25,999 or Meenar at ₹38,500, which are ducted decisions taken with your own HVAC consultant and never ducted into air handling serving a clinical zone.
For a lounge where the honest requirement is small, the SOSA reed diffusers are a separate set of registers from ₹749, lasting about 6 to 10 weeks, with 130ml from ₹1,249 and refills at ₹2,399 for 300ml and ₹3,499 for 500ml. Mountain Breeze at ₹849 is Himalayan pine, sage and cedar and Morning Freshness at ₹749 is Malabar lemon, mint and eucalyptus; both sit close to the register a healthcare room wants, and a reed has the property that it does not travel far from where it stands, which in a two-room question is genuinely useful.
Three places to go next, all inside this section. If you have not yet settled which patient rooms qualify at all, the two-question test is in should patient waiting areas in a day-surgery centre have ambient fragrance. If you have settled the rooms and need the dose, the four tests and the four-hour rule are in how subtle fragrance should be in a healthcare waiting lounge. And if your family lounge really is a separate volume behind its own door and you want to know what that makes possible, read can a premium family waiting area have a signature scent while patient zones stay neutral.
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. Send the plan to 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 across every room and every site already is a signature, because consistency makes a signature and uniqueness does not.
The SOSA scenting range
SOSA sells two different systems and one of the commonest mistakes is mixing them up. Size by the connected air volume of the room you are actually scenting - which in a day-care hospital is almost always the entrance, reception, billing and attendant lounge alone - floor area multiplied by ceiling height gives cubic feet, and cubic feet divided by 35.3 gives cubic metres. A door that stays shut ends one volume and begins another.
| Machine | System | What it is for | Price |
|---|---|---|---|
| SOSA Boond | Ultrasonic · water-based | A small desk or corner unit for one enclosed room - runs the water-based Hotel Collection | ₹899 |
| SOSA Sukoon | Ultrasonic · water-based | A larger ultrasonic for a reception or consultation room - Hotel Collection from ₹299 | ₹1,899 |
| SOSA Megh | Ultrasonic · 6L tank | A large-tank ultrasonic for a bigger lounge that runs all day | ₹3,499 |
| SOSA Vaayu | Waterless cold-air nebulising | The commercial machine - approx 1000 m3 of connected air, Bluetooth app and timer, no water and no humidity | ₹11,999 |
| SOSA Aangan | HVAC nebulising | Ducted scenting for approximately 8,000 to 10,000 sq ft | ₹25,999 |
| SOSA Meenar | HVAC nebulising | Ducted scenting for approximately 12,000 to 18,000 sq ft | ₹38,500 |
Two systems, and they are not interchangeable. The ultrasonics - Boond, Sukoon and Megh - run the water-based Hotel Collection from ₹299. Vaayu and the HVAC machines run waterless nebulising oil; the ₹299 water-based bottle never goes into a Vaayu. SOSA blends are SOSA's own hotel-inspired interpretations and SOSA is independent and not affiliated with any hotel brand. A portion of every order supports girl-child education through Nanhi Kali.
- Vaayu ₹11,999 - waterless cold-air nebulising, approx 1000 m3 connected air, Bluetooth app and timer, 400ml tank, freestanding or wall / HVAC mount, DC 12V / 1A, 5W, mains powered, CE / RoHS / SGS.
- Aangan ₹25,999 for approximately 8,000 to 10,000 sq ft and Meenar ₹38,500 for approximately 12,000 to 18,000 sq ft - both ducted into HVAC.
- The ultrasonics - Boond ₹899, Sukoon ₹1,899, Megh ₹3,499 - run the water-based Hotel Collection from ₹299, with 100ml refills at ₹999.
- Not published, and therefore never stated on this page: consumption rate, refill frequency, monthly running cost, machine lifespan, installation lead time or any minimum order. Those go to WhatsApp +91 96192 18531.
Versailles
A day-care hospital is the most careful room I write about, and I want to be plain about why. Somebody walks in at seven in the morning to have a procedure. Their mother or their husband sits in your lounge for four hours with nothing to do but look at the walls and worry. And a few metres away, behind doors that should stay shut, there is a zone where none of this belongs at all.
So the answer here is not a stronger machine or a cleverer scent. It is a boundary. Entrance, reception, billing and the attendant lounge are the public half of your building and they are allowed to feel like somewhere that was thought about. Pre-op, procedure, recovery and everything clinical are the other half, and the honest answer for all of it is nothing. Not less. Nothing.
Two things I say to every facility that asks. Fragrance adds scent - it never subtracts one, so it cannot cover disinfectant, and a scent laid over disinfectant makes a third smell that reads worse than either. And the decision is not mine or yours alone: what is introduced into the air of a building with a surgical zone belongs to your clinical leads, your infection-control team and your engineers. I would rather lose the sale than have a page of mine used to argue past them.
Frequently asked questions
Facts verified September 2026: SOSA Vaayu ₹11,999 is a waterless cold-air nebulising diffuser rated for approximately 1000 m3 of connected air, with Bluetooth app and timer, a 400ml tank, freestanding or wall / HVAC mounting and a DC 12V / 1A, 5W mains supply. SOSA Aangan ₹25,999 covers approximately 8,000 to 10,000 sq ft and SOSA Meenar ₹38,500 approximately 12,000 to 18,000 sq ft, both ducted into HVAC. The ultrasonic machines - Boond ₹899, Sukoon ₹1,899 and Megh ₹3,499 - run the water-based Hotel Collection fragrance from ₹299, with 100ml refills at ₹999; that water-based bottle is not used in a Vaayu or an HVAC machine. Reed diffusers start at ₹749 and last roughly 6-10 weeks. A coverage rating assumes one connected body of air; scent does not travel through a closed door. Ambient scent research supports improved evaluations of a space and its service, longer dwell and stronger recall at moderate effect sizes - it does not support claims about bookings, fees or retention. Fragrance adds scent and does not remove, neutralise or purify odour, and no SOSA product makes any health, antibacterial or air-purifying claim. No SOSA product is a medical device, a clinical product, an infection-control product or an air-treatment device, and none is validated for use in a clinical environment. Nothing in this guide is clinical, infection-control or engineering advice: in a facility with a surgical or procedural zone, what may be introduced into the air is governed by the operator's own clinical leadership, infection-control policy and facilities engineering, and their decision overrides every recommendation here. SOSA blends are SOSA's own hotel-inspired interpretations; SOSA is independent and not affiliated with any hotel brand. Prices and availability are subject to change - see the live product pages.