What you cannot do: schedule it from a controller, start it from a scene, trigger it from an occupancy sensor, edit it from another building, or read its state on a panel. 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. Bluetooth is a proximity technology — changing the hours means standing next to the machine.
The single most useful setting: the days. A house empty from Monday to Friday does not need fragrance from Monday to Friday, and oil evaporating into a room nobody is in is the only genuine waste in this category.
The honest gap: there is no low-tank alert and no remote status. A 400ml fill runs up to about 90 or more days depending on intensity and scheduled hours, so the refill is planned on a calendar, not prompted by a notification.
2. The schedule belongs to the machine, not to the house. There is no protocol here to schedule against. SOSA publishes no Wi-Fi, Alexa, Google Assistant, Matter, Zigbee, Z-Wave, KNX, Crestron, Control4, RS-232, dry contact or API, so a controller cannot hold these hours, a scene cannot start the unit, and a sensor cannot trigger it. It runs alongside the automation on the same timetable, not inside it. The client sitting in the room cannot tell the difference; the person designing the scenes must.
3. Design the window around occupancy, not around the clock. The useful principle is that a window should open before the space is used and close when it empties. Fragrance takes time to fill a volume and is registered the instant somebody crosses into it, so a window timed to the moment of arrival is always slightly late, and a window running through an empty house is the one true waste in this product category.
4. Use the day selection harder than you think you should. It is the setting people leave alone and the one that changes the most. A weekend house scented seven days a week spends five of them fragrancing nobody. A guest wing does not need a schedule at all until somebody is coming. Because a 400ml fill runs up to about 90 or more days depending on intensity and scheduled hours, trimming days directly lengthens the interval between service visits — though SOSA publishes no millilitres-per-hour rate and I am not going to invent one.
5. Commission at the lowest useful intensity, then key-lock it. Almost every complaint about a scented interior is a dosing complaint, and almost every dosing error is upward. Set it low, judge it from the doorway the following morning rather than from the sofa, and lock it so that neither staff nor a curious client can drift it higher over a fortnight.
Vaayu is ₹11,999, covers up to 1000 m³ of connected volume, runs under 38 dB, draws 5W at DC 12V / 1A, holds a 400ml sealed residue-free tank, and is CE, RoHS and SGS certified. Free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
A real domestic week, window by window
Scheduling reads as an abstract feature until you sit down with a household’s actual week, at which point it becomes a series of small, concrete decisions. Take an ordinary large residence: a family that leaves in the morning, returns in the evening, is at home properly at weekends, and travels for a fortnight twice a year. Four different situations, and the settings for each are genuinely different. What follows is how I would commission that house, and the reasoning holds whether the space is a villa, a penthouse or an experience centre with trading hours instead of a family.
Vaayu₹11,999The commonest domestic case is one long occupied stretch a day — the evening, in most households. A 4h window covers it comfortably, and the useful discipline is to open it around an hour before the household arrives rather than as they arrive. A nebuliser puts dry mist into the air and the room’s own air movement carries it; that takes time in a large connected volume, and the whole return on the purchase is collected in the two seconds somebody crosses the threshold. A window that begins at the moment of arrival gives them an empty hall and a nicely scented one twenty minutes later, when they have stopped paying attention. The same logic applies to a morning-occupied house: open it before the household is up, not when it is.
Cold-air oils₹1,799A Saturday is a different building from a Tuesday. The volume is occupied for most of the daylight hours, people move between spaces continuously, doors that are shut on a weekday stand open, and the connected volume is therefore larger. That is the case for the 8h window, and it is the same setting a home office or a showroom’s trading hours wants. Two things follow. First, at eight hours you should be at a lower intensity than at four, not the same one, because the volume has longer to reach a steady level. Second, this is where the refill cadence is actually decided: hours run and intensity together are what empty a 400ml tank, and SOSA’s published figure is up to about 90 or more days at moderate settings.
Ask before specifyingContactThis is the setting that separates a commissioned installation from a switched-on one. Fragrance released into a room with nobody in it is the only real waste in this product category — every millilitre leaves the tank either way, so the question is never whether the oil is used but whether anybody was there to receive it. So: deselect the weekdays in a house occupied at weekends. Deselect the weekend in a showroom that closes on Sundays. Leave a guest wing switched off entirely and turn it on the week before somebody arrives, which takes thirty seconds standing next to the unit. And when the family travels, the honest instruction in the handover note is to switch the units off rather than let a fortnight of oil go into empty rooms. Nothing is lost by stopping; the schedule is still there when it is switched back on.
Choosing the length before choosing the hour
Most people approach the app the wrong way round. They decide the time they want the fragrance to appear, then look for a window to fit it. The better order is to decide how long the space is continuously occupied, choose the window length that covers that stretch, and only then decide where in the day it sits. The reason is that the four lengths are not four degrees of the same thing; they are four different intentions. One hour is an event. Four hours is an occupied part of a day. Eight hours is a working day or a weekend. Twenty-four hours is a building that never empties, and in a private residence it very rarely is the right answer.
The one-hour window deserves more attention than it gets, because it is the setting an integrator will use most and a homeowner least. It is the arrival burst before people are expected. It is the demonstration tool during a walkthrough, where you switch the unit on from the app, continue the tour, and bring the client back through a hall that has quietly changed — a real and honest demonstrable moment, and a manual or scheduled one rather than a scene trigger. And it is the commissioning instrument: run an hour at the setting you think is right, leave the building, come back in and judge it at the door. You cannot assess a fragrance level from inside the room you set it in, because your own receptors stop reporting a constant stimulus within a few minutes. The person who has just walked in is a better instrument than the person who installed it.
One practical caution about how many windows a day you plan for. SOSA publishes four window lengths and a day selection; that is the published control surface, and I would design on the basis of a single continuous window per day per unit, because that is what is documented. If your scheme genuinely depends on two separated bursts in one day — a morning arrival and an evening return, with the middle of the day dark — settle that with the unit in your hand at commissioning before you promise it to a client, or ask us first through the contact page. I would rather you designed around the published capability than discovered its shape on site. In most houses the answer is simpler than the question anyway: pick the part of the day that matters most, cover it properly, and let the rest of the day be unscented, which is not a failure but a rest.
The four windows, and what each is actually for
The same four settings, read as design intentions rather than as durations, with the mistake each one invites. The last column is the one specifiers care about, because hours run and intensity together are what determine how often somebody has to visit the property with a bottle of oil.
| Window | The intention | Where it belongs | The mistake it invites | Effect on refill cadence |
|---|---|---|---|---|
| 1h | An event — an arrival, a viewing, a demonstration | Entrance halls before guests; a walkthrough; commissioning checks | Being run at high intensity to compensate for its brevity | The lightest of the four |
| 4h | One occupied part of the day | The commonest domestic setting — an evening, or a morning | Starting it at the moment of arrival rather than ahead of it | Moderate |
| 8h | A long occupied stretch | Weekends, home offices, a showroom’s trading hours | Keeping the same intensity used for a 4h window | Heavier; lower the intensity to compensate |
| 24h | A space that genuinely never empties | Rare in a residence; a continuously occupied commercial volume | Being chosen as a default because it needs no thought | The heaviest; shortens the interval most |
| Day selection | The setting that decides whether any of the above is wasted | Weekend houses, closed days, guest wings, absences | Being left on all seven days out of habit | The single largest lever you have |
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Intensity is the second dial, and it is the first one to move
Once the hours are right, the intensity is the only remaining adjustment, and it is the one most often set wrongly and in the same direction. Almost nobody under-doses a scented interior. Everybody over-doses one, and the mechanism is not carelessness but physiology: the person doing the setting has been in the room for twenty minutes, their receptors have already adapted to whatever is in the air, and so the level that reads as correct to them is the level that reads as too much to the next person through the door. You are supposed to notice a scented room on arrival and at transitions, not continuously. A fragrance you can smell every minute of an evening is set too strong for the volume, and the fix costs nothing.
So the commissioning rule is to begin at the lowest useful setting and move up only if a genuinely fresh nose reports nothing. Set it, leave for a quarter of an hour, walk back in through the front door at normal pace and make the judgement in the first three seconds. If the household includes someone who arrives home later, ask them the next day before touching anything. And then key-lock it. The key-lock is not a security feature so much as a stability feature: a setting that anybody can nudge will be nudged upward over a fortnight by people who have stopped smelling it, and a locked machine is how a considered level survives contact with the people who live or work around it.
Ceiling height belongs in this decision as well, because intensity is being spent into a volume rather than across a floor. Coverage is stated as up to 1000 m³ per unit, which corresponds to roughly 2,000 to 3,000 sq ft at an ordinary ceiling height — and in the houses this page is written for, the ceiling is frequently not ordinary. A double-height living room, a void over the dining table or an open stair consumes volume that the floor plan does not show, so the same intensity setting reads quieter there than it does in a standard-height room of the same footprint. Reason from the connected volume with the doors in their normal position, and remember that a closed door is a boundary while an open plan is one body of air. And use only alcohol-free, water-free oils formulated for cold-air diffusion, such as the SOSA Hotel Collection; thick undiluted essential oils are not recommended in this machine, because they clog the fine nozzle over time.
The commissioning sequence — and the honest gap
In the order I would actually do it on site, with the last row stating what this product does not give you. None of these steps takes long, and the whole sequence is finished inside an hour on a single-zone property, but doing them out of order is how an installation ends up either invisible or overwhelming.
| Step | What you do | Why it comes here | Reference |
|---|---|---|---|
| 1. Establish the volume | Walk the space with the doors in their normal position and mark the connected volume, noting where the ceiling is not standard | Everything downstream is a response to this number, and floor area alone will mislead you | Up to 1000 m³ per unit |
| 2. Fix the position and the supply | Freestanding, wall-mounted or into an HVAC return, with a low-voltage point at that position | Because the position cannot be changed later without a visible cable | DC 12V / 1A, 5W |
| 3. Set the days | Deselect every day the space is reliably empty, before you look at hours | It is the largest lever and the one most often skipped | Day selection |
| 4. Set the window | Choose the length that covers the occupied stretch, opening ahead of arrival | Length follows occupancy; the hour follows the length | 1h / 4h / 8h / 24h |
| 5. Dose low and judge from the door | Lowest useful intensity, leave for fifteen minutes, walk back in and decide in three seconds | You cannot judge a level from inside the room you set it in | Adjustable intensity |
| 6. Key-lock and record | Lock the setting, then write down hours, days, intensity, oil and date | Nothing else on the property is storing any of this | Key-lock, auto-stop |
| No alert, no remote, no status: the honest gap | There is no low-tank warning, no notification, no way to change the hours from another building and no panel that shows whether it is running | Diary the refill instead: a 400ml fill runs up to about 90 or more days depending on intensity and scheduled hours, so a quarterly visit covers it at moderate settings | Ask us first |
Versailles
When somebody asks whether fragrance can be scheduled, what they usually mean is whether it can be made to stop bothering them at the wrong times. That is a better question than it sounds, and the answer to it is not a feature list. A scented interior is judged almost entirely at its edges — the moment of walking in, the moment of moving from one room to another — and everything in the middle is a level nobody is consciously reading. So the schedule is not there to give you more fragrance. It is there to make sure the fragrance is at its proper level at the two or three moments in a day when a person is capable of noticing it.
The setting I have to argue for most often is the one that switches things off. It feels counter-intuitive to sell somebody a machine and then spend the commissioning visit deselecting days, but oil evaporating into a house nobody is in is the only genuine waste in this product, and it is invisible — nobody ever complains about it, because nobody is there. A weekend house running seven days a week is spending five-sevenths of its consumable on empty rooms, and no amount of clever hardware will notice.
The other thing I would say to anyone commissioning one of these is to distrust your own nose at the end of the visit. You will have been standing next to the unit for an hour, your receptors will have quietly stopped reporting, and you will reach for a higher intensity. Do not. Set it low, key-lock it, and let the client tell you the next morning what they smelled when they opened the front door. Everything is composed in Pune, and a portion of every order funds a girl’s classroom through Nanhi Kali.
Frequently asked questions
- Can fragrance be automated like lighting, curtains and air conditioning? — scheduled, not integrated, and the architecture drawn in words.
- What an automated scenting system actually is — reservoir, nebuliser, schedule, intensity, mounting.
- Can a smart home turn its fragrance on and off? — yes, but the machine owns the logic, not the house.
- Is a waterless machine suitable for a smart home? — no humidity, no residue, 5W.
- How it fits a luxury setup — placement in the project rather than in the protocol stack.
- Different intensities in different areas — a machine per zone, each set independently.
- Planning it during design — the supply, the return and the zone boundaries.
- Lighting, climate and scenting together — a shared timetable, not a shared bus.
- Is automated fragrance the next layer? — the honest case, and what would have to change.
- 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, read 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; the schedule is stored in the unit. 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; Vaayu cannot be started, stopped, scheduled, triggered or monitored by any home-automation control system, voice assistant, hub or sensor. Mounting: freestanding, wall-mounted or into an HVAC return — a mechanical integration, not a digital one. 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; SOSA publishes no millilitres-per-hour consumption rate and none is estimated here, and no rupees-per-month running figure is published as a specification. 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. Other SOSA machines: Sukoon ₹1,899 ultrasonic (500ml, 270–320 sq ft), Boond ₹899 (up to about 150 sq ft), Megh ₹3,499 (six-litre tank, about 100 hours runtime, only about 215 sq ft — a runtime and humidity machine, never a coverage upgrade), Aangan ₹25,999 (~8,000–10,000 sq ft), Meenar ₹38,500 (12,000–18,000 sq ft). 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.