Placement is the decision that quietly determines whether your scenting works, and it is almost always made by accident. Somebody unpacks the machine on the day it arrives, looks for a socket, finds the only free one behind the plant by the corridor, and that is where it lives for the next four years. The register was chosen over three weeks. The position was chosen in forty seconds, by the electrician's original plan, and it will do more damage or more good than the register ever could.
In a hospital there are two additional constraints that do not exist in a showroom or a restaurant, and both are non-negotiable. The first is the boundary: the unit must be kept away from the doorway or corridor that leads to the clinical zone, and it must never be placed in or ducted into air handling that serves clinical areas. The second is physical safety. The SOSA Vaayu is mains powered at DC 12V / 1A, 5W, so it needs a live socket - and in a hospital lobby a trailing cable across a route used by wheelchairs, trolleys, walking frames and people who have just been discharged is not acceptable at any level of design elegance. Placement here is partly an electrical question and partly a safety question before it is ever an aesthetic one.
And the sentence that governs the entire page: your own facilities engineers approve the position, not this page. Where a unit may stand, what it may be fixed to, which socket it may use and how close it may be to any particular door are questions for the people who run your building and your clinical zone. This page can tell you what to consider. It cannot tell you what is permissible in your facility, and it does not pretend to.
The boundary as always: 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 at all, not a lower setting, nothing.
Why does placing a scent machine near an air conditioning vent matter? Because the room's air will decide where the fragrance goes, not the machine. A unit sitting in a supply airstream has its output taken and distributed by the air handling rather than by the room, which can carry it much further than intended, including towards doors it should be nowhere near. A unit next to a return grille has its output drawn straight out of the room you were trying to scent, so the lobby reads as nothing while the plant room gets the benefit. Both are placement problems and neither is fixed by raising the level.
Who decides where the machine may go in a hospital? The facility's own facilities engineers, together with its clinical and infection-control leadership. They decide which volumes may be scented at all, how far a unit must be from a particular door, what may be fixed to a wall, and which socket may be used. A scenting unit is never ducted into air handling that serves a clinical zone, and where ducting is a question at all it is answered by your own HVAC consultant. No page, and no supplier, can approve a position in a building they have not seen.
One: is it inside the volume you mean to scent? This sounds trivial and it is the most commonly broken rule in commercial scenting. Machines end up in corridors, in lift lobbies, in service passages and behind counters facing a wall, because those are the places with a spare socket and no furniture. If the unit is in the corridor, the corridor is what you are dosing, reception gets whatever leaks through, and the doors at the far end of that corridor get tested every time somebody walks through them. Put it in the room, facing into the room, not at a wall two feet away.
Two: is it out of a supply airstream? If the unit sits directly under or in front of a supply diffuser, the air handling takes the output and distributes it on its own terms rather than the room's. That can carry fragrance much further than you intended, and in a hospital "further than intended" has a specific and unacceptable destination. Move it out of the throw.
Three: is it away from a return grille? The mirror image, and the reason for the most common complaint I hear: "it smells right at the desk and of nothing in the seating area". A unit near a return has its output pulled straight out of the room. Nobody looks up at the ceiling when this happens; they turn the level up, which makes the immediate area too much and the far corner still nothing. Find the return before you find a socket.
Four: is it out of a dead corner? Behind a pillar, inside a planter, tucked into an alcove with no air moving through it. A machine needs the room's circulation to distribute what it produces, and a pocket of still air behind a column gives it nothing to work with. The output accumulates locally and the room stays unscented, which again gets misdiagnosed as a level problem.
Five: is it off the sightline and out of reach? Off the sightline because the arrival should not be a diffuser - in a hospital lobby the first thing a visitor sees should be the desk and the signage, and a machine on a plinth in the middle of the floor is both a statement you did not intend and an obstacle. Out of reach because a bottle of fragrance oil at a height a child can reach, or on a surface that gets knocked, is a spill and a mess in a building where the floor is walked by people on crutches. Behind the counter, on a shelf, or wall-mounted at a sensible height are all better than a side table.
Six, and this one exists only in this kind of building: how far is it from the clinical boundary? Keep the unit away from the doorway or corridor that leads to the clinical zone, and put more distance in than feels necessary. Not because a few metres is a magic number, but because doors get propped, trolleys hold them open, and a unit near that threshold is a unit whose output is being offered to the boundary every time somebody walks through. And the absolute rule underneath it: a scenting unit is never placed in, or ducted into, air handling that serves a clinical zone. Not at a low setting, not on a timer, not ever. Where ducting is a question at all - for the Aangan at ₹25,999 or the Meenar at ₹38,500 - it is an engineering decision taken by your own HVAC consultant for the public-side air handling only.
Then the practical constraint that decides most of it in reality: the socket. The Vaayu is DC 12V / 1A, 5W and mains powered, so the position has to be somewhere with a live outlet. Do not solve that with an extension lead across a lobby floor. A cable on a route used by wheelchairs, trolleys, walking frames, drip stands and people who have just been discharged is not acceptable, and no amount of tape over it makes it acceptable. If the right position has no socket, the honest options are to have one added properly by your own electrician, to wall-mount the unit near an existing outlet, or to choose a different position. Those are the three options. A trailing cable is not a fourth.
And the last word belongs to the people who run the building. Your facilities engineers approve the position, alongside your clinical and infection-control leadership, and their answer overrides everything above. A portion of every SOSA order supports girl-child education through Nanhi Kali.
Here is the test that exposes a bad position faster than anything else. Stand where the machine is going to go and ask: where does the air here come from, and where does it go? If you cannot answer, you are not ready to place it. Look up. Find the supply diffusers and find the returns; they are usually both in the ceiling and both easy to miss because nobody in a lobby ever looks at the ceiling. In an older converted building, find the split units and note which way they throw. Then place the machine where the room's own movement will carry the output across the space you care about, rather than where it will be taken away or driven somewhere you do not want it.
The second test is about the boundary and it takes two minutes. Walk from the machine's proposed position to the door of the clinical zone, counting your paces, then stand at that door and look back. Is there anything between the two - a wall, a turn, a set of doors, a change of level? A straight open run of twenty paces is worse than a dog-leg of twelve, because the geometry matters more than the distance. And watch that door through a busy morning: if it is propped open for deliveries or held by a trolley at nine every day, the plan you drew on paper is not the building you have.
The third is the one that gets forgotten entirely: housekeeping. Wherever the unit goes, somebody with a mop and a trolley has to work around it twice a day, and somebody has to be able to reach it to refill it and to switch it off. Place it where the cleaning round will not knock it, where a refill does not require moving furniture, and where the off switch is genuinely accessible - because an accommodation arrangement that requires a stepladder is not an arrangement. If a visitor reports a sensitivity at four on a Saturday afternoon, the person on the desk must be able to switch that named unit off without finding a manager or a ladder.
And one aesthetic note for a premium facility, because it does matter. A visible diffuser on a plinth reads as a device. A unit behind the counter, on a shelf among other things, or wall-mounted discreetly reads as part of the building. The second is what you want here - the same logic that governs the level governs the object. The room should not announce that a decision was made.
Six placement rules, one of which exists only in a hospital
Placement decides three things that most facilities believe are decided by the machine or the register. It decides coverage - whether the room you meant to scent is actually the room that gets scented. It decides containment - whether the fragrance stays in the public half or offers itself to the clinical boundary. And it decides drift over time, because a badly placed machine produces an uneven result, an uneven result gets misdiagnosed as a level problem, and the dial goes up. Almost every over-scented commercial building I have walked into was a placement failure being treated as a level failure.
The physical principle behind all of it is the one that carries this whole bank: a coverage rating assumes one connected body of air. The Vaayu at ₹11,999 is rated for approximately 1000 cubic metres of connected air, and SOSA's own copy also states 2,000 to 3,000 sq ft scented evenly. Both of those numbers describe air that is joined together. A machine cannot push scent through a closed door, and it has no particular appetite for pushing against a pressure difference either. So placement is not "where does it look good" - it is "which connected volume does this unit belong to, and is that the volume on my plan".
Work out that volume by hand before you choose a position. Floor area multiplied by ceiling height gives cubic feet, and cubic feet divided by 35.3 gives cubic metres. A 600 sq ft reception at 12 ft is 7,200 cubic feet, about 204 cubic metres. An 800 sq ft connected front of house at 12 ft is 9,600 cubic feet, about 272 cubic metres. A 1,000 sq ft lobby at 14 ft is 14,000 cubic feet, about 397 cubic metres, and at a double-height 18 ft it is 18,000 cubic feet, about 510 cubic metres. A 2,000 sq ft connected public floor at 12 ft is 24,000 cubic feet, about 680 cubic metres. If your front of house is one open volume of 680 cubic metres, one well-placed unit is a sensible plan; if it is three rooms with doors that stay shut, one unit scents one of them however well you place it.
Then the hospital-specific layer, which is the reason this page is not simply a reprint of a retail placement guide. A day-care hospital has a boundary running through it, and the corridor that crosses that boundary is exactly where free sockets and spare floor space tend to be. The machine wants to go there for entirely practical reasons and it must not. That tension - between where it is convenient to put a unit and where it is appropriate - is the whole of this page, and it is resolved in favour of appropriateness every time, with an electrician called in if necessary.
Finally, one thing that placement can never do, so that nobody spends money in the wrong direction. Placement does not fix a smell. Fragrance adds scent and does not remove odour, so a unit positioned brilliantly in a lobby that smells of the housekeeping round or of a building shut since Saturday evening still produces two smells rather than one. Source, then ventilation, then cleaning, then fragrance. And never, in any phrasing, adjust ventilation, close a vent or reduce extraction so that a badly placed machine performs better. Move the machine.
Out of the supply airstream. A unit placed directly under or in front of a supply diffuser hands its output to the air handling, which then distributes it on the building's terms rather than the room's. In a showroom that produces an oddly uneven result. In a hospital it produces something worse: fragrance travelling much further than you planned, along paths you did not choose, potentially towards doors it should be nowhere near. Find the supply diffusers - they are in the ceiling and nobody ever looks at the ceiling - and keep the unit out of their throw.
Away from the return grille. The commonest complaint in this category is "it smells right at the desk and of nothing where people sit", and the commonest cause is a unit within a few feet of a return. Everything it produces is pulled straight out of the room. The wrong response is to raise the level, which makes the immediate vicinity too much and leaves the far corner unchanged. The right response is to move the unit to the other side of the room, and it costs nothing. Locate the returns before you locate a socket.
Out of a dead corner. Behind a pillar, inside a planter box, in an alcove with no circulation. A machine depends on the room's own air movement to distribute what it produces, and a pocket of still air gives it nothing to work with, so the output accumulates locally and the room stays unscented. This one is particularly common because a dead corner is exactly where an interior designer wants to hide a device.
Off the main sightline. In a premium facility the first things a visitor should see through the door are the desk and the signage. A diffuser on a plinth in the middle of the floor is a statement you did not intend to make, an obstacle on a route walked by people with mobility aids, and a thing that draws attention to a decision that works best unannounced. Behind the counter, on a shelf, or wall-mounted discreetly all read as part of the building rather than as a device.
Out of reach. Not at a height a child can reach, not on a surface that gets knocked, not on a low table in a route used by trolleys. A bottle of fragrance oil going over in a hospital lobby is a slip hazard on a floor walked by people on crutches, and it is entirely avoidable with a shelf. "Out of reach" has one important exception, which is the off switch: that must stay accessible to whoever is on the desk, because an accommodation that requires a ladder is not an accommodation.
Two smaller points that belong with these five. Height: a unit placed very low tends to scent the floor and a unit placed very high tends to hand its output to the ceiling layer and the returns, so somewhere around counter or shoulder height in the room, facing into the space, is the usual sensible answer in a lobby with a normal ceiling. And housekeeping: whatever position you choose, somebody with a mop and a trolley works around it twice a day and somebody has to reach it to refill it. A position that is elegant and impossible to clean around will be moved within a month by somebody who was not in the meeting.
The absolute half first. A scenting unit is never placed in, or ducted into, air handling that serves a clinical zone. Not at a low setting, not on a timer, not as a temporary arrangement while something else is being built. Where ducted scenting is a question at all - the Aangan at ₹25,999 for approximately 8,000 to 10,000 sq ft, the Meenar at ₹38,500 for approximately 12,000 to 18,000 sq ft - it applies to public-side air handling only, and whether your public side and your clinical side are genuinely separate systems is a question for your own HVAC consultant and your facilities engineers rather than for a supplier or a page. Where they are not separate, the answer is a freestanding unit in a public room, or nothing.
Now the half about distance. Keep the machine away from the doorway or corridor that leads to the clinical zone, and put in more distance than feels necessary. There is no magic number and this page will not invent one, because the right distance depends on your geometry, your air handling and your own engineers' view. What there is instead is a set of things to look at.
Geometry beats distance. A straight open run of twenty paces from the unit to the clinical door is worse than a dog-leg of twelve with a wall in between. Air moves along routes, and a turn, a lobby, a change of level or an intervening set of doors is worth more than raw metres.
Watch the door in real life, not on the plan. A door that is shut on the drawing is frequently propped open for the delivery at nine, held by a trolley at eleven and wedged for the cleaning round at two. If the boundary door is open for twenty minutes of every hour, the two volumes are one volume for those twenty minutes, and the position you chose on paper is not the position you have. Stand and watch it for a morning. It is the most useful hour anybody spends on this.
Look for the ways air gets across without the door opening. A door undercut, a shared return serving both sides, a corridor acting as a plenum between two zones that look separate on a drawing, a transfer grille somebody installed years ago for airflow balance. None of these are fragrance problems and none of them have fragrance answers - they are engineering questions answered by your own HVAC consultant, and this page raises them only so that you know to ask.
Never solve any of it by reducing air exchange. If somebody suggests damping a supply, closing a vent or turning down extraction so that fragrance behaves better or lingers longer, the answer is no, in a healthcare building especially. A well-ventilated lobby is genuinely harder to scent than a sealed room and that is a fact to design around rather than to negotiate with. Ventilation wins. Move the machine, lower the level, or do not scent that room.
And the corridor itself deserves a paragraph, because it is where plans break. A corridor is a fifteen-second space that is connected to everything, and it is where machines physically end up because that is where the free socket is and where there is no furniture. If the unit is in the corridor, the corridor is what you are dosing, the public rooms get the leak, and the clinical doors are tested all day. My default in a day-care hospital is simple and it has never let me down: corridors get nothing, and the machine goes in a room.
One more point that belongs here rather than in a footnote. The list of rooms that receive nothing - pre-operative areas, procedure and operating rooms, post-procedure and post-anaesthesia recovery, sterile and decontamination areas, clinical and drug storage, clinical waste - should be written as named rooms on the same drawing that carries the machine position, so that the two decisions live in one place. A principle in somebody's head gets reinterpreted in month seven by a new supervisor who thought the recovery bay looked bare. A list on a drawing does not.
The socket. The SOSA Vaayu at ₹11,999 runs on DC 12V / 1A at 5W and is mains powered: it needs a live outlet, and so does every ultrasonic in the range - the Boond at ₹899, the Sukoon at ₹1,899 and the Megh at ₹3,499. This constraint decides more installations than any principle on this page, because the ideal position and the nearest socket are very rarely the same place. Survey the sockets before you choose the position, not after, and include that survey in the same walk where you find the supply diffusers and the returns.
The cable. Here is the rule that is specific to this building and it does not bend. A cable running across a floor used by wheelchairs, trolleys, walking frames, drip stands and patients who have just been discharged is not acceptable, and taping it down does not make it acceptable. Nor does a cable cover strip on a route where somebody with reduced mobility has to step over it. If the position you want has no socket, there are exactly three honest options: have an outlet added properly by your own electrician, move the unit to a wall-mounted position near an existing outlet, or choose a different position within the same volume. A trailing lead is not a fourth option and a facility that installs one has converted a fragrance decision into a fall risk.
Mounting. The Vaayu is freestanding - it lays flat - or wall or HVAC mounted, and in a hospital the wall mount is very often the right choice for exactly the reasons above: it takes the unit off the floor, off the counter, out of reach, out of the cleaning round's way, and lets the cable run vertically to a socket rather than horizontally across a route. Anything fixed to a wall in your building is your facilities team's decision: what it is fixed to, at what height, with what fixings, and whether that wall has services in it.
Water, and why it matters here. The ultrasonics are water-based cool-mist machines with a tank, and they put moisture into the air. That is a perfectly good system in the right room and it is a conversation to have with your own engineers in a building with a surgical zone. The Vaayu and the ducted machines are waterless cold-air nebulising: undiluted oil, no water, no humidity, no wet residue. That is the single reason most facilities with a clinical half will consider a machine at all, and it is also a placement advantage - there is no tank to fill in a public lobby and nothing wet near a floor people walk on. And the two systems are not interchangeable: the ₹299 water-based Hotel Collection bottle never goes into a Vaayu or an HVAC machine.
Timers as a placement tool. The Vaayu's Bluetooth app and timer are usually discussed as a level control, and they are also a containment control. A machine that runs only during OPD hours is not producing anything overnight into a closed building where nobody is present, the air handling may be running differently, and doors that are attended during the day may be sitting open for cleaning. Run the hours you are open and nothing more.
And who signs it off. Not this page and not the supplier. Your facilities engineers approve the position, together with your clinical and infection-control leadership, and they may reasonably refuse a position that looks obvious from the outside - a wall that carries services, a distance from a particular door that their own policy sets, a socket that belongs to a circuit they do not want anything added to, a room they have decided is out of scope. Take a drawing with the proposed position, the connected volume, the ceiling height, the supply and return locations and the fragrance-free zone list marked on it, and get the answer in writing. A supplier who tells you their machine is approved for, safe for or suitable for a healthcare environment is making a claim about your building that they are not in a position to make. 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.
- Walk the lobby and find the supply diffusers, the returns and the live sockets.
- Mark the connected volume you mean to scent, and place the unit inside it.
- Measure to the clinical doorway and add more distance than feels necessary.
- Have your own facilities engineer approve the position before anything is fixed.
Placement decides more than register, and the socket decides placement
Placement interacts with register in one way that is worth knowing, and in no other way that anybody can measure. The way it does interact is evenness: a register that is easy to keep under the naming line is more forgiving of an imperfect position, because a slight hot spot near the unit matters less when the register is transparent to begin with. That is a practical observation rather than a measurement, and it points at the same shortlist the rest of this bank keeps arriving at.
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. White Tea Serenity - white tea, aloe, cedar - is clean, weightless and spa-like and the most forgiving choice for a facility that is not going to fuss over the position. Quiet Luxury - white tea, bergamot, cedar - is hushed and polished and behaves almost as forgivingly, with a little more lift at a threshold. Forest Suite - cedarwood, vetiver, green leaves - reads as structural rather than decorative, which means an uneven room reads as a building with character rather than as a device in a corner.
Tea Garden - jasmine, green tea, white tea - is the least risky floral in the collection and a step warmer, so it wants a lower setting and a more careful position, particularly in a small enclosed reception where there is nowhere for it to go. Warm Welcome - citrus, floral, sandalwood - is a genuine hospitality threshold register for a small family-facing facility and should be run at a fraction of hotel level. Old-World Glamour - amber, violet, woods - and Lobby Bar - citrus, pepper, amber - are the wrong shape for a clinical building at any position and any setting, because plush reads as covering and after-dark reads as theatrical at seven in the morning.
The Vaayu and the ducted machines run four hotel-inspired waterless blends instead, supplied with the machine as one of three bundle choices, and those are a different fragrance system rather than the same bottles in another size. If you are choosing a register on an ultrasonic now and expect to move to a Vaayu when the lobby is finished, say so on WhatsApp before you buy so that nobody ends up with a ₹299 water-based bottle and a machine that does not take it.
What this page will not do is rank the registers on measured throw or longevity, or tell you that one of them "reaches further" and therefore forgives a worse position. SOSA does not publish that comparison and no honest supplier can give you one that survives contact with your lobby: connected volume, ceiling height, ventilation rate, automatic-door traffic, soft furnishing and the setting swamp any difference between blends. Where a machine reaches is a question about your room and where you put the unit, not about which bottle is in it.
And the register for every room on the fragrance-free list is not a quiet one. It is none: pre-operative areas, procedure and operating rooms, post-procedure and post-anaesthesia recovery, sterile and decontamination areas, clinical and drug storage and clinical waste. Write that list on the same drawing as the machine position, and let your clinical, infection-control and engineering leads own it.
| Scent | Why it suits the mood |
|---|---|
| Inside the volume, facing into the room · check one | Not in a corridor, not in a lift lobby, not behind a counter facing a wall two feet away. Whatever room the unit stands in is the room being dosed, and everything else gets the leak. In a day-care hospital my default is that corridors get nothing at all and the machine lives in a room, because a corridor is connected to everything including the doors you care most about. |
| Out of the supply throw, away from the return · checks two and three | A unit in a supply airstream has its output distributed by the building rather than the room, which can carry it further than planned. A unit near a return has its output pulled out of the room you were trying to scent, which produces the classic complaint of right at the desk and nothing where people sit. Look at the ceiling and find both before you look for a socket. |
| Distance and geometry to the clinical door · check six, hospital only | Keep the unit away from the doorway or corridor that leads to the clinical zone and add more distance than feels necessary. Geometry beats raw metres: a dog-leg with a wall in it is worth more than a straight open run. And watch that door through a real morning, because a door that is shut on the drawing is often propped for deliveries and held by trolleys. |
| A live socket and no cable across the floor · the constraint that decides it | The Vaayu is DC 12V / 1A, 5W and mains powered. If the right position has no outlet, add one properly, wall-mount near an existing one, or choose another position in the same volume. A lead taped across a route used by wheelchairs, trolleys, walking frames and just-discharged patients is not acceptable, and your facilities engineers approve the final position. |
Sizing and placement are the same conversation, because the number of units and where they go are decided together by the connected volume. Do the arithmetic by hand. A 600 sq ft reception at 12 ft is 7,200 cubic feet, about 204 cubic metres. An 800 sq ft connected front of house at 12 ft is 9,600 cubic feet, about 272 cubic metres. A 1,000 sq ft lobby at 14 ft is 14,000 cubic feet, about 397 cubic metres, and at a double-height 18 ft, 18,000 cubic feet or about 510 cubic metres. A 2,000 sq ft connected public floor at 12 ft is 24,000 cubic feet, about 680 cubic metres; at 14 ft, 28,000 cubic feet or about 793 cubic metres. A 3,000 sq ft public floor at 12 ft is 36,000 cubic feet, about 1,020 cubic metres, which is already at the edge of a single unit.
Against those figures, the waterless SOSA Vaayu at ₹11,999 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. One well-placed unit covers most day-care hospital front-of-house volumes comfortably, which is why the placement question matters more than the quantity question in this vertical. It takes a 400ml tank, mounts freestanding or on a wall or into HVAC, runs on DC 12V / 1A at 5W and needs a live socket, has Bluetooth app and timer so it scents only OPD hours, and carries CE, RoHS and SGS. Waterless cold-air nebulising of undiluted oil means no water, no humidity and no wet residue. 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.
For a single counter and a normal waiting area, an ultrasonic is usually the whole purchase and the placement rules are identical: the SOSA Boond at ₹899 or the SOSA Sukoon at ₹1,899, both running the water-based Hotel Collection from ₹299 with 100ml refills at ₹999, and the SOSA Megh at ₹3,499 with its 6 litre tank where a connected lounge runs all day. These take a socket too, and the cable rule applies to them exactly as it does to a Vaayu. 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 - are engineering decisions taken with your own HVAC consultant for public-side air handling only, never into air handling that serves a clinical zone.
And for any room behind a door that stays shut, the placement question has a different answer entirely, because no machine anywhere else reaches it: a SOSA reed diffuser from ₹749, lasting about 6 to 10 weeks, with no plug and therefore no cable at all. Morning Freshness at ₹749 and Mountain Breeze at ₹849 sit closest to a healthcare setting; the 130ml is from ₹1,249 with 300ml refills at ₹2,399 and 500ml at ₹3,499. Place those out of reach and off the route too - a bottle of oil on a low table in a trolley corridor is the same hazard by a different route.
Where to go next. If your lobby reads right at the counter and as nothing where people sit, that is this page's problem rather than a dose problem, but the tests that tell the two apart are in how strong fragrance should be in a day-care hospital reception. If you are still deciding whether you need a machine at all, the arithmetic is in is a reed diffuser enough for a private hospital reception. And the reason a lobby can be right at the door and nothing ten feet in - which is a placement finding rather than a level one - is explained in should fragrance be noticeable immediately at a healthcare entrance.
What SOSA does not publish and this page will not invent: consumption rate, refill frequency, monthly running cost, machine lifespan, minimum order or installation lead time. Send your floor plan with the ceiling heights, the supply and return positions, the socket locations and the fragrance-free zone list marked on it to WhatsApp at +91 96192 18531 and you will get a sensible steer on position and sizing - which your own engineers then approve or overrule. 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: 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.