That is a smaller purchase than the question usually expects, and it is smaller for a reason that has nothing to do with budget. A multi-floor building is vertically connected in ways a floor plan does not show. Draw four floors on four sheets of paper and each looks like an independent set of rooms with its own doors. Stand in the building and it is one tall object with a stairwell running up the back of it, a lift shaft beside that, service risers behind the walls, and warm air moving upward through all three whether anybody planned it or not. Air does not read floor plans. It reads temperature, pressure and holes.
Which means the sentence this bank keeps coming back to - a closed door ends one connected body of air and begins another - is harder to deliver vertically than horizontally. Two rooms on one floor separated by a door that actually stays shut are two volumes, and you can usually satisfy yourself of that in a morning. Two floors separated by a slab are not automatically two volumes, because the slab has openings in it by design: a staircase, a lift, a riser, sometimes an atrium. "One floor scented, another neutral" is a real arrangement and a deliverable one, but it is a claim that has to be verified rather than assumed, and the verification is done by your own facilities engineers rather than by a page or by a supplier's confidence.
There is a second, duller reason a multi-floor facility is a different problem: it is not one decision, it is several. Each floor usually has its own reception or sub-waiting area with its own footprint, its own ceiling height, its own dwell time and its own mix of people. A ground-floor lobby where nobody stays longer than four minutes, a first-floor consultation waiting area where somebody sits for ninety, a second-floor attendant lounge where a family sits for four hours, and a third floor that is entirely clinical and gets nothing at all. Four floors, four different volumes, four different answers, and one of the four answers is "nothing".
Everything below is about the public half of your building. Pre-operative areas, procedure and operating rooms, post-procedure and post-anaesthesia recovery, sterile and decontamination areas, clinical and drug storage and clinical waste get nothing - not a lower setting, nothing - and what may be introduced into the air of a building with a surgical zone is decided by your own clinical leadership, infection-control policy and facilities engineering, whose decision overrides every recommendation here.
Does scent travel between floors in a hospital? It can, and the routes are the staircase, the lift shaft, service risers and any atrium or open void - not the slab. Warm air rises, so a scented ground-floor lobby has a natural path upward that a scented room on one floor does not have sideways into the room next door. That is why a vertical boundary is checked rather than declared: walk the stairwell and the lift lobby on every floor at different times of day, with somebody who has not been in the building, before you tell anybody that an upper floor is fragrance-free. The engineering question - risers, pressure relationships, shared air handling - belongs to your own HVAC consultant.
Should each floor get its own machine? Usually not. Several units across several floors means several settings that drift apart, several people who might adjust them, and a seam wherever two scented areas meet at a lift lobby. One machine in the ground-floor public volume with deliberate zeroes above it is simpler, cheaper and easier to defend: a SOSA Sukoon at ₹1,899 with the water-based Hotel Collection from ₹299 for a normal lobby, or the waterless SOSA Vaayu at ₹11,999 where the arrival volume is genuinely large.
Here is the reasoning, and it is structural rather than commercial. On a single floor, the boundary you are relying on is a door. Doors are visible, they are somebody's responsibility, they either stay shut or they do not, and you can stand on both sides of one and know. Vertically, the boundary you are relying on is a slab - and a slab is not a sealed plane. It has a staircase punched through it, a lift shaft running beside it, service risers carrying pipework and cabling behind the walls, and in a smarter building an atrium or a light well cut right through the middle. Every one of those is a vertical opening, and warm air goes up through vertical openings. In a hot climate with air conditioning running on some floors and not others, and a ground floor whose automatic doors keep letting warm street air in, you have a building that is quietly moving air upward all day long.
So the honest sequence is: scent the arrival, then check, then decide whether anything upstairs is even on the table. Not: plan four floors, buy four machines, and discover in month two that the first-floor lift lobby smells of the ground floor.
The second half of the answer is about what is upstairs, and here a multi-floor day-surgery facility has a shape that single-floor facilities do not. The upper floors are where the clinical work usually sits, because that is how these buildings are planned - the public, noisy, deliverable-and-visitor traffic stays low, the procedure floors go high, and the lift becomes the boundary between them. Which means the floors that are physically hardest to isolate are frequently the floors that most need to be left alone. That is not a coincidence to work around. It is the single strongest argument for the small answer: put the fragrance at the bottom of the building, keep it low, and let the upper floors be exactly what they should be, which is nothing.
Where an upper floor is genuinely public - a consultation floor with its own waiting area, an attendant lounge above the lobby, a first-floor diagnostics reception - it can be considered on its own merits, as its own volume, with its own arithmetic and its own setting. A 600 sq ft first-floor sub-waiting at a 12 ft ceiling is 600 x 12 = 7,200 cubic feet, and 7,200 divided by 35.3 is about 204 cubic metres. That is a small room in air terms and a cheap one to serve. But consider it after the ground floor is working and after somebody has checked the stairwell, not at the same time, and never on the assumption that "upstairs is a separate floor so it is a separate problem".
And the part of this that is not mine to decide. Everything above is about where air goes in a building, which is an engineering matter, and about what a room communicates, which is a design matter. What may be introduced into the air of a facility that contains a surgical zone is neither. It belongs to your clinical leadership, your infection-control policy and your facilities engineers, their answer can be no, and no is a complete and legitimate outcome. A portion of every SOSA order supports girl-child education through Nanhi Kali.
The mistake I see most often in these buildings is not over-scenting. It is replication: a director decides the lobby smells good, and instructs that the same thing be done on every floor, because consistency sounds like a virtue and because a building that is scented in one place and not another feels unfinished. It is not unfinished. It is designed. A multi-floor facility that smells of something at the door and of nothing at all upstairs is reading correctly to every visitor who walks through it, because the arrival is the part of the building that is meant to say hello and the clinical floors are the part that is meant to say nothing.
The second mistake is the lift lobby. On every floor of a multi-floor building there is a small space in front of the lift doors, usually under 200 sq ft, usually with no windows, usually with its own weak air movement, and it is where a scenting plan quietly falls apart. It is the one spot on each upper floor that is directly and repeatedly connected to the shaft, so it is the first place any vertical leak shows up, and it is also the place where a well-meaning housekeeping supervisor puts a plug-in because it looked bare. Walk your lift lobbies on every floor. They will tell you more about your building's air than any drawing will.
The third is a governance mistake rather than a physical one, and multi-floor buildings are especially prone to it because different floors have different people in charge. One floor's supervisor turns something up, another floor's turns something off, a third adds a reed diffuser on a shelf, and within six months nobody can tell you what the building actually runs. Write the scenting plan as a document with named floors, named rooms and written settings, and write the fragrance-free floors into the same document as a list rather than as a principle. A principle gets reinterpreted by whoever is on shift. A list on a drawing does not.
Set the level for the coldest reading available to you, which in a multi-floor building is a particular moment: the first arrival of the day walking from the street into a ground-floor lobby that has been closed since the previous evening, then getting into a lift. If it is right for that person, it is right. If it was set by you at four in the afternoon after eight hours in the building, it is roughly double what it should be - and in a tall building, double at the bottom becomes detectable at the top.
What a multi-floor building does with air that a floor plan never shows you
Three things decide how a multi-floor day-surgery facility should be scented, and only one of them appears on the drawings you already have. The first is vertical connection: the staircase, the lift shaft, the service risers and any atrium, plus the plain fact that warm air rises through all of them. The second is that a multi-floor building is several volumes and several decisions rather than one - each public floor has its own footprint, its own ceiling height, its own dwell time and its own answer, and one of those answers is always "nothing". The third is verification: a vertical boundary is a claim, and a claim has to be tested by walking the building before anybody writes it into a brand standard.
What does not decide it is total built area. Facility owners tend to size scenting against the number on the lease, which in a multi-floor day-surgery centre might be 12,000 or 18,000 sq ft across four floors. That number is close to meaningless here, because the scented volume is the public areas of the public floors alone, which is very often a ground-floor lobby and a reception counter and nothing else. A building with 18,000 sq ft on the lease may have 1,000 sq ft of genuinely scentable air. That gap is the most useful thing on this page, and it is the reason a multi-floor facility usually buys less than it expected rather than more.
It is worth being concrete about what these buildings physically are, because the pattern repeats. Ground floor: entrance with automatic doors, lobby, reception and billing, sometimes a pharmacy counter and a diagnostics reception, ceiling often 10 to 14 ft and occasionally a double-height 16 to 20 ft if the building was designed rather than fitted out. First floor: consultation rooms, a consultation waiting area, sometimes the attendant lounge. Second floor: day-care beds, pre-operative preparation, the procedure or operating rooms, recovery. Third floor: plant, stores, administration, staff areas. The lift and the staircase pass through every one of them. That is the object you are scenting, and the honest description of it is not "a four-floor hospital" but "a ground-floor public space with three floors of building on top of it".
One more framing, because it changes the shape of the decision and it is specific to tall buildings. On a single floor, the failure mode of over-scenting is that the lobby is too much. In a multi-floor building, the failure mode is that the lobby is too much and it arrives somewhere it should not. The consequence of getting the level wrong is no longer just aesthetic. That is why every recommendation on this page runs lower, slower and smaller than the equivalent advice for a single-floor clinic, and why the sequence is always arrival first, verification second, upper floors last or never.
The answer is: not automatically, and not in the way people assume. The slab between two floors is solid, but the building has been deliberately punched through it in several places. There is a staircase, which is a continuous column of air from the bottom of the building to the top, interrupted only by doors that may or may not be kept shut. There is a lift shaft, which is a continuous column of air with a piston moving up and down inside it all day, pushing air ahead of itself and dragging air behind it, and opening onto a small lobby on every floor. There are service risers carrying pipework, drainage, cabling and ductwork, boxed in behind walls, and these are frequently less sealed than anybody imagines. And in a building that had an architect rather than a fit-out contractor, there may be an atrium or a void connecting two or three floors as a design feature - which is a beautiful thing and a scenting engineer's nightmare, because it is a deliberate vertical hole.
Now add the physics, which is ordinary and inconvenient. Warm air moves upward. In a building with vertical openings, that produces a slow, continuous, whole-building movement: air enters low, rises through the shafts and stairs, and leaves high. It is stronger in hot weather, stronger when the ground floor is warm and the upper floors are cooled, and stronger the taller the building. The practical consequence is that your ground-floor lobby has a natural upward path that no room on a single floor ever has sideways.
This is why "one floor scented, another floor neutral" is a harder statement than "one room scented, the next room neutral". Both can be true. The horizontal one is usually true by default because a door is doing the work and you can see the door. The vertical one is true only if the vertical openings behave, and you cannot see any of them. So it stops being an assumption and becomes a claim that has to be verified.
Two things follow from that, and they are both practical. The first is that the ground floor is the right place to put fragrance in a multi-floor building not only because that is where arrival happens, but because it is the floor with the fewest floors above it that you are lying to. The second is that the level matters more here than in a bungalow-plan clinic, because whatever you run at the bottom has a route upward, and the quieter it is the less there is to travel.
And the honest limit of what this page can tell you. Whether your particular risers are sealed, whether your stairwell doors are on closers, whether your lift shaft is vented at the top, whether your upper floors are at positive or negative pressure relative to the stair, and how your air handling is zoned - none of that is knowable from here, and all of it is determinative. Those questions belong to your facilities engineers and your HVAC consultant. A scenting unit is never placed in or ducted into air handling that serves a clinical zone, and in a multi-floor building the question of what any given air handler actually serves is one you must ask rather than infer from the drawing.
Do the arithmetic separately for each one, by hand, and state the ceiling height every time, because in a multi-floor building the heights genuinely differ - ground floors are usually taller than the floors above them, and a designed entrance can be double height while every floor above it is a standard 10 or 12 ft.
The ground-floor lobby and reception. A 1,000 sq ft lobby at a 12 ft ceiling is 1,000 x 12 = 12,000 cubic feet, and 12,000 divided by 35.3 is about 340 cubic metres. If the entrance is double height at 18 ft over a 600 sq ft footprint, that is 600 x 18 = 10,800 cubic feet, about 306 cubic metres - a small floor area holding a large body of air, which is the classic multi-floor surprise. If the whole connected ground-floor public area runs to 1,500 sq ft at 12 ft, that is 18,000 cubic feet, about 510 cubic metres. Dwell here is short and unpredictable: four minutes at check-in, forty when the list slips.
A first-floor consultation waiting area. Typically 600 to 800 sq ft at 12 ft, so 7,200 cubic feet (about 204 cubic metres) or 9,600 cubic feet (about 272 cubic metres). Dwell here is longer and more consistent than the lobby - thirty to ninety minutes, seated, with a door to the consultation rooms that opens and closes constantly. This is a room where a level set for a lobby will read as too much, because nobody in a lobby stays long enough to notice what somebody sitting for an hour notices.
An attendant or family lounge, wherever it sits in the stack. The most legitimately scentable room in a day-care hospital, for reasons this bank has argued elsewhere: an attendant is not a patient, they are not fasting, they are not about to be called, and they will sit for three to five hours with nothing to do but evaluate your furniture and your air. A 600 sq ft lounge at 12 ft is 7,200 cubic feet, about 204 cubic metres. Set that room for the person at hour four rather than the person at minute three.
Any clinical floor. Nothing. Pre-operative areas, procedure and operating rooms, post-procedure and post-anaesthesia recovery, sterile and decontamination areas, clinical and drug storage, clinical waste. Not a lower setting, not a subtler register, not a reed diffuser on a windowsill. Nothing - and on a floor that is entirely clinical, that includes the lift lobby and the corridor, because there is nothing on that floor that the plan is trying to serve.
Now the point of the exercise, which is not the numbers but what the numbers reveal. Add up only the volumes on the "yes" list, and in a typical four-floor day-surgery centre you get something like 340 cubic metres of ground-floor public space plus perhaps 204 on the first floor, against a lease that says 15,000 sq ft. The honest finding, which this section of the bank keeps arriving at, is that the scented volume is the public areas alone, which is a fraction of the building, so the purchase is smaller than the reader expects. That is not a disappointment. It is the correct answer arriving early, and it saves you the money you were about to spend on floors that were never an opportunity.
And one honest caution about upper-floor sub-waiting areas specifically. They are usually smaller and more enclosed than the ground-floor lobby, with less air movement and no automatic door constantly exchanging air with the street. A small enclosed room over-scents faster than anything downstairs, and it is where a personal fragrance from the person sitting two chairs away is already competing. If you do scent an upper public floor, it wants a lower setting than the lobby, never the same one and never a higher one.
Here is how the check is actually done, and it costs nothing but somebody's morning. Run the ground-floor unit at your intended setting for at least a week, so the building has reached whatever steady state it is going to reach. Then take somebody who has not been in the building that day - a colleague from another site, a family member, anybody with an unadapted nose - and walk them through a fixed route, in this order: in from the street, stand in the lobby, take the staircase up one floor and stop on the landing, step into the lift lobby on that floor, walk to the far end of that floor's corridor, then repeat on every floor above. Do it twice: once first thing in the morning before the building warms up and the traffic starts, and once in the middle of the afternoon on a busy day. Write down what they say at each stop, in their words, before you tell them what you are testing.
What you are looking for is not a pass or a fail so much as a map. If the first-floor landing reads of the lobby and the first-floor corridor reads of nothing, you have learned that the stairwell is the route and that a door closer is the fix. If the lift lobby on the second floor reads of the lobby, you have learned that the shaft is the route, which is not something a fragrance decision can solve and is a conversation with your engineers. If nothing above the ground floor reads of anything, you have learned that your setting is low enough and your building behaves - and you should write that down too, with the date and the setting, because it is the evidence that supports your plan.
Repeat the walk seasonally. A building in February and the same building in May are not the same air. Stack effect is stronger when the temperature difference between inside and outside is larger, and the ground floor with automatic doors is the part of the building most affected by what the weather is doing outside. A boundary that held in winter is not automatically a boundary that holds in the monsoon.
Then the operational half of "goes wrong", because in a multi-floor building it is different from a single-floor one. The plan fails floor by floor, over months, through good intentions. A new supervisor on the first floor adds something. A machine on the second floor gets moved to a different socket during a repaint and nobody moves it back. A unit gets turned up on a busy Tuesday and never turned down. The countermeasure is dull and it works: one written document, listing every floor, every room that is scented, the register, the exact setting, the machine's physical position, and - in the same document, with equal weight - the named floors and rooms that are fragrance-free. Tape a card to each machine with the register and the number. Review it when anything is refurbished, because a refurbishment is when scenting plans silently die.
And the last thing, which is why this factor is titled the way it is. In my experience of these buildings, the check almost always leads to the same conclusion, and the conclusion is a relief rather than a restriction: the ground-floor arrival was the whole answer. One volume, one machine, one setting, one register, written down, with deliberate zeroes on every floor above it. It is cheaper, it is easier to hold consistent, it is far easier to explain to a clinical lead, and it produces exactly the impression a multi-floor facility wants - a building that says something at the door and nothing at all where nothing should be said. If your own clinical, infection-control and engineering leadership decide even that much is not appropriate in your building, that is a complete answer and the right one, and no page should be used to argue past it.
- List every floor and mark each public area and each fragrance-free area by name.
- Do the volume arithmetic separately per floor and state the ceiling height each time.
- Scent the ground-floor arrival low, and then change nothing for two weeks.
- Walk the stairwell and every lift lobby with an unadapted nose before adding anything.
Which register, on which floor, and the floors that get nothing at all
Register matters less than placement in any building, and in a multi-floor building it matters less still - but there are two things worth saying about it that are specific to a tall facility.
The first is that one register across the whole public stack is the right call, if you scent more than one floor at all. Not a different character per floor, however tempting that sounds when the first-floor waiting area has different furniture. A building that smells of white tea at the door and of something green one floor up does not read as sophisticated; it reads as uncoordinated, and it draws attention to the fragrance as a decision rather than letting it sit underneath the architecture. Consistency is what turns a register into a house character. One register, different levels per floor according to volume and dwell, is the correct arrangement.
The second is that in a building with vertical connection, you want a register that is happy to be faint - one that still reads as something at a low setting rather than disappearing into nothing, because you will be running it lower here than you would in a single-floor clinic. That points at the same shortlist this bank always arrives at for healthcare, and for the same reason: clean and unsweet reads right in a clinical building, because a sweet or plush character over a warm enclosed room reads as covering something rather than as generosity.
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. In a multi-floor building that is doubly useful, because if a trace of it does find the first-floor landing, a trace of "clean" is a far more forgiving thing to find than a trace of something plush. Quiet Luxury - white tea, bergamot and cedar - is hushed and polished, the same idea with a little more finish at a threshold, and the safest single decision in the collection for a very mixed public. Forest Suite - cedarwood, vetiver and green leaves - is grounding and biophilic green, and it is the right answer where the ground floor has timber, stone or real planting; it reads as structural rather than decorative, which is a genuine advantage in a lobby where thirty strangers are waiting.
Tea Garden - jasmine, green tea and white tea - is the least risky floral in the collection because the jasmine sits inside the tea rather than on top of it, but it is a step warmer than the two white-tea registers and wants a lower setting to match, which makes it a harder choice in a building where the level is already being held down for vertical reasons. Warm Welcome - citrus, floral and sandalwood - is warm and gracious, a genuine threshold register, and it can work in a family-facing neighbourhood facility if it is run at a fraction of what a hotel would use. Old-World Glamour - amber, violet and woods - is plush and evening-elegant, and it is the wrong shape for a clinical building: plush is precisely the character that reads as covering. Lobby Bar - citrus, pepper and amber - is bold, playful and after-dark, and it has no home in a day-care hospital at any setting; turning a theatrical register down makes it quiet, not appropriate.
All seven are SOSA's own hotel-inspired interpretations, and SOSA is independent and not affiliated with, endorsed by or connected to any hotel brand. Those seven are the water-based Hotel Collection for the SOSA ultrasonics; the Vaayu and the ducted machines run four hotel-inspired waterless blends instead, supplied with the machine as one of three bundle choices. Two different fragrance systems, not the same bottle in two sizes. And 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 rate, door traffic and setting swamp any difference between blends in a building nobody has stood in.
The zones that get no register at all, on any floor, at any price: pre-operative areas, procedure and operating rooms, post-procedure and post-anaesthesia recovery, sterile and decontamination areas, clinical and drug storage, and clinical waste. On a floor that is entirely clinical, that means the whole floor, lift lobby and corridor included.
| Scent | Why it suits the mood |
|---|---|
| Ground floor: entrance, lobby, reception · the answer | The arrival volume, and in most multi-floor facilities the only place fragrance belongs. A 1,000 sq ft lobby at 12 ft is 12,000 cubic feet, about 340 cubic metres; a double-height 600 sq ft entrance at 18 ft is 10,800 cubic feet, about 306 cubic metres. Short, unpredictable dwell and constant automatic-door air exchange, so set for the quiet period rather than the morning peak. |
| Upper public floor: consultation waiting, attendant lounge · only after checking | Its own volume and its own longer dwell. A 600 sq ft sub-waiting at 12 ft is 7,200 cubic feet, about 204 cubic metres; 800 sq ft at 12 ft is 9,600 cubic feet, about 272 cubic metres. Smaller, more enclosed and with less air movement than the lobby, so it wants a lower setting, never the same one. Consider it only once the ground floor is stable and the stairwell has been walked. |
| The stairwell, lift shaft and lift lobbies · never a target, always a test | Vertical openings through every slab, with warm air moving upward through all of them. Nothing is ever placed here to be scented. They are where you go to find out whether your boundary is real, on foot, with somebody whose nose has not adapted, in the morning and again in the afternoon, and again in a different season. |
| Any clinical floor · nothing at all | Pre-operative areas, procedure and operating rooms, post-procedure and post-anaesthesia recovery, sterile and decontamination areas, clinical and drug storage, clinical waste. Not a lower setting - nothing. On a wholly clinical floor that includes the corridor and the lift lobby. Write it as named floors and named rooms on the drawing, and treat your clinical and infection-control leads as the owners of that list. |
So the buying answer for a multi-floor facility, which is almost always smaller than the question implies. If the ground-floor public volume is a normal reception and lobby of roughly 340 cubic metres or less, an ultrasonic is usually the whole purchase: the SOSA Boond at ₹899 for a small enclosed front 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 is how you audition registers in your own lobby air rather than choosing from a description. If the ground-floor lounge runs from seven in the morning to eight at night without a break, the SOSA Megh at ₹3,499 and its 6 litre tank saves somebody refilling at lunchtime.
The waterless SOSA Vaayu at ₹11,999 earns its place in a tall building when the ground-floor arrival is genuinely large and open - a double-height entrance running into reception, billing and a seating area as one connected volume, somewhere in the region of 510 to 680 cubic metres rather than 204 - and when you want it to run on a timer with your OPD hours rather than all night into a closed building. It is rated for approximately 1000 cubic metres of connected air, and SOSA's own copy also states 2,000 to 3,000 sq ft scented evenly. It takes a 400ml tank, mounts freestanding, on a wall or into HVAC, runs on DC 12V / 1A at 5W so it needs a live socket, and carries CE, RoHS and SGS. Its strongest argument in a hospital is what it does not do: waterless cold-air nebulising of undiluted oil, so no water, no humidity and no wet residue anywhere in a building that has a surgical zone in it. 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 or into Aangan at ₹25,999 (approximately 8,000 to 10,000 sq ft) or Meenar at ₹38,500 (approximately 12,000 to 18,000 sq ft), which run waterless nebulising oil and are ducted. In a multi-floor healthcare building a ducted machine is an engineering decision taken with your own HVAC consultant and nobody else, because in a tall building the question of which floors a given air handler actually serves is exactly the question you cannot answer from a drawing - and a scenting unit is never placed in or ducted into air handling that serves a clinical zone. If what you want at a small ground-floor desk is no plug, no noise and nothing to switch off, the SOSA reed diffusers are a separate set of registers from ₹749 lasting about 6 to 10 weeks, with Mountain Breeze at ₹849 and Morning Freshness at ₹749 sitting closest to a healthcare counter.
To go further into the questions this page opens: if what you are really weighing is whether to buy one machine or several units across several areas, the costed comparison and the third option that usually wins are in one scent machine or multiple zones for a large private healthcare centre. If your ground-floor lobby is large and your instinct is to solve it with more reed diffusers, the arithmetic that explains why that does not work is in why multiple reed diffusers still struggle to cover a large hospital reception. And the three mechanisms that decide how far anything travels in your lobby - the air conditioning, the automatic doors and the ceiling height - are set out in how central AC, automatic doors and high ceilings affect fragrance distribution in hospital lobbies.
What SOSA does not publish, and what this page will therefore not invent: consumption rate, refill frequency, monthly running cost, machine lifespan, minimum order quantity or installation lead time. Those depend on run hours, connected volume and setting, and they are yours rather than ours. Send your floor plans, the ceiling height of each floor, the position of the staircase and lift, and a marked list of every fragrance-free floor and room to SOSA 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 across the public stack 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.