What it is not: SOSA publishes no Wi-Fi, no voice assistant, no hub, no Matter, no KNX, no proprietary control protocol, no relay input and no API. There is no way to put it in a scene, and I would rather you heard that from me than from a client.
The real integration point is mechanical, not digital: Vaayu can be mounted into an HVAC return, which is how one unit serves a whole floor evenly. That is a genuine, published, drawable integration — it just happens in the ductwork rather than on the bus.
The specification line: up to 1000 m³ of connected volume per unit (roughly 2,000–3,000 sq ft at standard ceiling height), DC 12V / 1A and 5W at the mounting position, under 38 dB, 400ml sealed tank lasting about 90+ days, freestanding, wall-mounted or HVAC-return mounted, CE / RoHS / SGS, black or white.
2. There is no protocol, and I will not leave that ambiguous. SOSA publishes no Wi-Fi, no Alexa, no Google Assistant, no Matter, no Zigbee, no Z-Wave, no KNX, no Crestron, no Control4, no RS-232, no dry contact and no API. The complete control story is a Bluetooth app plus onboard buttons, with auto-stop and a key-lock. If a page anywhere tells you a scent machine at this price joins your bus, ask it which protocol and which certification, and read the answer carefully.
3. The mechanical integration is real, and it is the one worth designing around. Vaayu can be mounted into an HVAC return. That is a published mounting option, not a workaround, and it is what turns a single unit into an even distribution across a whole floor instead of a strong point near a shelf. Coordinate it with the mechanical drawings the way you would coordinate any in-duct component. Distinguish it clearly, in your own head and in the client's, from digital integration — which does not exist.
4. Plan the supply, because it is small enough to forget. DC 12V / 1A, 5W. Trivial as a load and easy to omit from a drawing, and an omitted socket at a wall-mounted or return-mounted position is a first-fix problem, not a snag. Put the outlet on the electrical layout at the mounting height you actually intend to use.
5. Set it lower than instinct suggests and lock it. The commonest fault on a commissioned system is not that fragrance is absent but that it is too strong, because whoever set it stood in the room for ten minutes and stopped smelling it. Receptors adapt to a constant stimulus within minutes; the client entering from outside does not. Dose for the arriving nose, then apply the key-lock so the setting survives contact with staff, cleaners and the client's own curiosity.
Vaayu is ₹11,999, covers up to 1000 m³ of connected volume, runs under 38 dB, holds 400ml for about 90+ days, and is CE, RoHS and SGS certified. Use alcohol-free, water-free oils formulated for cold-air diffusion, such as the SOSA Hotel Collection. Free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
The architecture, drawn in words
Picture the system you already build. At the top there is a controller. Below it there is a bus, and on that bus there are addressed devices: dimmers, drive units, thermostats, valve actuators, keypads. A scene is a stored set of target states, and when it is called the controller writes those states to those addresses. Feedback comes back up the same path, which is why a keypad LED can tell a client the curtains are closed even when the client is in another room. Everything in that description depends on one thing: a single owner of state.
Now add fragrance to the drawing, and put it in the correct place. Vaayu is not a leaf on that tree. It is a second, much smaller tree standing next to it, with its own root: a schedule held in the unit's own memory, written to it once over Bluetooth from a phone standing in the room. The two trees never touch. There is no wire between them, no gateway, no bridge and no address. What synchronises them is not a protocol but a decision — you set the fragrance window to match the hours the client actually occupies the space, and from then on the two systems agree because they were told the same thing, not because one is talking to the other.
That is a less impressive diagram and a more honest one, and in my experience integrators are relieved rather than disappointed by it, because it maps onto something they already own. Every project has a handful of elements that behave correctly without being on the bus — and the professional question is never whether they are addressed, it is whether their behaviour is documented, commissioned and locked. Fragrance belongs in that category. The failure mode you are avoiding is not a client saying why isn’t the diffuser in my Good Night scene. It is a client discovering, six months after handover, that they were allowed to believe it would be.
Vaayu₹11,999When a scene dims the lights, draws the curtains and drops the setpoint, it will not touch the diffuser, because there is nothing there for it to touch. The design move is to stop thinking of fragrance as a participant in the scene and start thinking of it as a background condition the scene happens inside. If the evening scene is called at around seven most nights, the fragrance window should already have been running for an hour by then, because scent needs time to reach a room and no time at all to be noticed once it has. In practice that means fewer, longer windows rather than many short ones: a morning window that covers arrival and the first working hours, an evening window that covers the hours before and after the client comes home, and nothing at all through the night unless the client has specifically asked for it.
Hotel Collection₹1,799 / 300mlYour system cannot display whether the unit is running, and this matters less than it sounds and more than you expect. Less, because a nebuliser either runs or does not and the failure is audible at close range. More, because the commonest call you will receive is the fragrance has stopped working — and it almost never has. Olfactory receptors adapt to a constant stimulus within minutes, so a resident sitting in a room stops registering a scent that a visitor walking in still finds obvious. The honest diagnostic is to leave the space for fifteen minutes and come back, or to ask somebody who has just arrived. A visitor is a better instrument than an occupant. Tell the client that at handover and you will convert a support call into a moment of expertise.
Ask before you specifyContactBluetooth is a proximity technology. Changing the run window means standing near the unit with the app, which has one obvious drawback and one underrated advantage. The drawback is that you cannot adjust it from your office the way you would adjust a schedule in a controller, so a client request becomes a site visit unless you have handed the app to somebody on site. The advantage is that nobody can change it remotely either, and that the key-lock holds the setting against staff, housekeepers and clients who decide the fragrance would be better at maximum. On a residence, decide at handover who holds the app and who holds the key-lock, and write it down. On a showroom, the answer should almost always be the manager and nobody else.
Why scent has stayed outside the stack, and why that is not a defect
It is worth saying plainly why there is no fragrance object in your product library. Three reasons, none of them about ambition. There is no standard. Lighting, blinds and climate converged on shared control models because thousands of manufacturers needed to interoperate; scenting is a small category with no equivalent pressure, so every machine holds its own logic. There is a consumable. A luminaire does not run out. A fragrance machine holds 400ml and empties over about 90 or more days depending on intensity and scheduled hours, which means the real maintenance event is a refill visit, and no protocol solves that. And the useful control surface is smaller than it looks — hours, days and intensity is very nearly the whole of it, because the one thing you must not do is vary fragrance dynamically and constantly. A scent that changes is a scent people notice as a mechanism rather than as an atmosphere.
That last point deserves more weight than it usually gets. In lighting we prize responsiveness; a room that adjusts to occupancy and daylight feels intelligent. Fragrance behaves in the opposite direction. The luxury signal in scent is constancy at a low level, not variation at a high one. A client who can detect the machine switching states is a client who has been over-dosed, and the fix is always downward. So the absence of triggers, sensors and dynamic control is, for this particular subsystem, a considerably smaller loss than it would be anywhere else on your drawing. The schedule is not a reduced version of integration. For this application it is close to the whole of what integration would have been used for.
The one place I would genuinely like more control is diagnostics — a way for a facilities manager to see remaining oil across six units in a large villa without walking to each one. That does not exist in this product, and I am not going to imply it does. What exists instead is a refill cadence you can plan: a 400ml fill runs about 90 or more days at moderate settings, so a quarterly service visit covers it, and on a multi-unit project the sensible move is to refill every unit on the same day whether or not each one needs it, because a synchronised cadence is easier to hold than an accurate one.
Bus device versus scheduled appliance, line by line
This is the comparison I would want if somebody handed me a scent machine and asked whether it belonged on my drawing. The left-hand column is any addressed device on your system. The right-hand column is Vaayu. The last two rows are the ones that decide whether you are comfortable specifying it.
| Aspect | Lighting, curtains, HVAC on a bus | SOSA Vaayu ₹11,999 | What it means on site |
|---|---|---|---|
| Where the logic lives | In the controller | In the unit itself | The machine automates itself; the system does not automate it |
| Control interface | Keypads, app, touch panel, third-party integrations | Bluetooth app plus onboard buttons | Adjustments are made in the room, not remotely |
| Programmable behaviour | Scenes, schedules, conditions, sensor logic | 1h / 4h / 8h / 24h windows, day selection, mist intensity, auto-stop | Enough for a fragrance strategy, and deliberately not more |
| Scene participation | Yes, as a target state | No, and there is no protocol by which it could be | Design fragrance as the background the scene happens inside |
| Status feedback | Reported to the system | None — check at the unit or in the app | Brief the client on adaptation to pre-empt the false alarm |
| Protection from tampering | User permissions in software | Physical key-lock on the unit | The commissioned dose actually survives occupancy |
| Mechanical integration | Not applicable | Freestanding, wall-mounted or HVAC-return mounted | The return mount is the real integration — in the ductwork, not the bus |
| Services requirement | Mains, bus cable, backbox | DC 12V / 1A, 5W at the mounting position | Small, and small is exactly what gets left off a drawing |
Cold-air nebulising · Vaayu₹11,999See it → 
Ultrasonic water mist · Sukoon₹1,899See it → 
Passive capillary · reed₹849See it →
What you can actually put on a drawing
Here is the part that earns the specification, because it is all verifiable and all of it belongs in a coordinated set. Coverage is stated in volume, not floor area: up to 1000 m³ per unit, which at an ordinary ceiling height works out at roughly 2,000 to 3,000 sq ft. Reason in volume, always, and particularly on the projects this cluster is written for. A double-height living room or a stairwell open to a landing consumes coverage that a square-foot figure conceals, and a house full of closed bedroom doors is not one zone of 3,000 sq ft — it is a set of small separate volumes, because a closed door is a boundary and an open plan is one volume. I am not going to give you a machines-per-square-foot rule, because there is not an honest one. Establish the connected volume with the doors in their normal position, note the ceiling heights, look at where the air actually moves, and the number will present itself.
On the electrical layout, show DC 12V / 1A, 5W at the intended mounting position. Five watts is a rounding error against the rest of the project and that is precisely why it gets missed: nobody coordinates a load they can ignore, and then the wall-mounted unit at 1.8 metres has no supply behind it. On the mechanical layout, if you are taking the HVAC-return option, coordinate the position with whoever owns the ductwork exactly as you would for any in-duct component, and note access for refilling — a 400ml tank filled about four times a year still has to be reachable by somebody standing on the floor or on a step, not on a ladder in a plant space. Under 38 dB is the acoustic figure, which is why the unit is acceptable in a bedroom or a consulting room, though I would still keep it off a bedhead wall on principle.
Finally, specify the consumable, because this is where good projects go wrong at the two-year mark. Vaayu takes alcohol-free, water-free fragrance oils formulated for cold-air diffusion, such as the SOSA Hotel Collection at ₹1,799 for 300ml. Thick undiluted essential oils are not recommended — they are viscous, they load the fine nozzle and over time they will clog it. This matters because it is exactly the mistake a well-meaning person makes: a client returns from a holiday with a bottle of neat oil, or a designer specifies something aromatic and natural-sounding, and eight months later a unit that was performing correctly is not. Put the oil family in the specification and say so at handover.
What to specify, in order — and the honest gap
The shortlist as I would give it to an integrator standing in front of a client, in the order the decision actually gets made, followed by the thing this product does not do. I would rather lose a specification than win one that unravels at commissioning, so the last row of this table is the limitation stated as plainly as I know how to state it.
| Specify | What it is | When it is the right answer | Price |
|---|---|---|---|
| 1. Vaayu ★ | Waterless cold-air nebuliser, up to 1000 m³, Bluetooth schedule, key-lock, under 38 dB, DC 12V/1A 5W | One per connected volume in a villa, penthouse or experience centre | ₹11,999 |
| 2. Hotel Collection 300ml | Alcohol-free, water-free oils formulated for cold-air diffusion | Always — the oil family belongs in the specification, not in the client's hands | ₹1,799 |
| 3. HVAC-return mounting | The published mechanical mounting option, coordinated with the ductwork | Where one unit must serve a whole floor evenly rather than a room strongly | Coordination, not cost |
| 4. Sukoon | Ultrasonic water mist, 500ml, 270–320 sq ft — a different mechanism entirely | A single small room where Vaayu would be over-specified | ₹1,899 |
| 5. Aangan | HVAC nebulising, approximately 8,000–10,000 sq ft | Above Vaayu's sensible ceiling, where several Vaayu zones would be unwieldy | ₹25,999 |
| No protocol, no scene, no API: the honest gap | SOSA publishes no Wi-Fi, voice assistant, hub, Matter, KNX, RS-232, dry contact or API. There is no way to address Vaayu from a control system | Disclose it to the client in writing before you specify, not after | Stated, not stretched |
Versailles
I have had this conversation enough times to know how it usually goes wrong, and it is never at the sale. It goes wrong at commissioning, when somebody who was allowed to assume too much discovers the assumption. So I have decided to be the person who says the awkward thing first: Vaayu automates itself, and it does not join your system. Bluetooth app, onboard buttons, run windows, days, intensity, auto-stop, key-lock. That is the complete list, and there is nothing behind it.
What I have also learned is that this is a much smaller problem than it sounds, because of what fragrance actually needs to do. You are not looking for responsiveness. You are looking for a low, steady presence that a person notices when they arrive and stops noticing while they stay — which is not a failure of the product, it is how the nose works. Receptors adapt within minutes. Design for the person coming through the door, not for the person on the sofa, and you will set the intensity lower than your instinct says and be right.
The place I would spend your attention is the mechanical drawing rather than the control schedule. A low-voltage supply at the mounting position, an HVAC return you can actually reach for a refill, a zone boundary drawn where the doors are rather than where the plan looks tidy. Those decisions are made once, at drawing stage, and they determine whether the thing works. The schedule takes four minutes and can be changed for as long as the building stands. Everything we make is composed in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
Frequently asked questions
- What an automated scenting system actually is — reservoir, nebuliser, schedule, intensity, mounting.
- Can a smart home turn fragrance on and off automatically? — yes, but the machine owns the logic.
- Is a waterless machine suitable? — no water, no humidity, no residue near electronics.
- Where it fits in a luxury setup — placement in the project rather than the protocol stack.
- Scheduling to certain hours and different intensities in different areas — the windows and the per-zone rule.
- Planning it during design — the architect's page in this family.
- Light, climate and scent together — a shared timetable, not a shared bus.
- Is fragrance the next layer? — the argument, made honestly.
- Brand: the SOSA founder story.
SOSA Vaayu — facts verified August 2026: ₹11,999. Waterless cold-air nebulising diffuser; pressurised air shatters undiluted oil into a dry nano-mist, with no water, no dilution, no added humidity and no residue. Coverage up to 1000 m³, approximately 2,000–3,000 sq ft at standard ceiling height, measured as connected volume rather than floor area. Control: Bluetooth app plus onboard buttons, run windows of 1h / 4h / 8h / 24h, day selection, adjustable mist intensity, auto-stop and key-lock. SOSA publishes no Wi-Fi, Alexa, Google Assistant, Matter, Zigbee, Z-Wave, KNX, Crestron, Control4, RS-232, dry-contact or API integration of any kind, and Vaayu cannot be addressed by, or included in a scene on, any home-automation control system. Mounting: freestanding, wall-mounted or into an HVAC return. Power DC 12V / 1A, 5W at the mounting position. Under 38 dB. 400ml sealed, residue-free, refillable tank lasting up to about 90+ days depending on intensity and scheduled hours. CE, RoHS and SGS certified. Black and white finishes. Oils must be alcohol-free, water-free fragrance oils formulated for cold-air diffusion, such as the SOSA Hotel Collection (100ml ₹999 · 300ml ₹1,799 · pack of seven ₹1,799); thick undiluted essential oils are not recommended as they clog the fine nozzle. Above Vaayu's range: Aangan ₹25,999 (~8,000–10,000 sq ft) and Meenar ₹38,500 (12,000–18,000 sq ft). Below it, on a different mechanism: Sukoon ₹1,899 ultrasonic (270–320 sq ft) and Boond ₹899 (up to about 150 sq ft); Megh ₹3,499 has a six-litre tank and long runtime but covers only about 215 sq ft and is never a coverage upgrade. SOSA reed diffusers are alcohol-free, phthalate-free, paraben-free, IFRA-compliant and 0 ppm formaldehyde, with six fibre reeds in a refillable glass bottle, composed in Pune. A scent machine adds fragrance; it does not clean, purify or deodorise air, and SOSA makes no health or air-quality claim. SOSA publishes no dealer programme, reseller margin, trade price, territory, minimum order, lead time, installation charge or maintenance contract; commercial enquiries are welcome at https://sosahomeandbody.com/pages/contact. Free shipping above ₹499. A portion of every order supports girl-child education through Nanhi Kali. SOSA is an independent Indian fragrance house; the Hotel Collection scents are SOSA's own interpretations inspired by the world's finest hotels, and SOSA is not affiliated with or endorsed by any hotel brand or any home-automation manufacturer. Prices subject to change — see the live product pages.