Then check whether you are inside the rating at all. Ten thousand square feet under a plain ten-foot ceiling is 100,000 cubic feet, which is a little over 2,800 m³ — just inside up to 3,000 m³. Raise the ceilings to twelve feet and the same plan holds roughly 3,400 m³, which is outside it. At this size the ceiling height decides the answer more than the floor area does, and a double-height lobby decides it faster still.
What the integrator needs at the mounting position: a DC 12V supply at 14W, a bracket that will carry a 3.9 kg metal body measuring 284 × 125 × 246 mm with clearance to open it, service access to an 800ml reservoir without a ladder over a members’ lounge, and an injection point on the supply side of the air handling unit that can be reached without shutting the plant down. It runs under 42 dB, which matters if the position ends up in a ceiling void rather than a plant room.
The schedule is the part people forget: a duct only distributes while the fan is running, so the fragrance schedule has to sit inside the plant schedule. Aangan carries programmable work and pause cycles and daily schedules on a board to make that easy — but there is no digital link of any kind, so the two schedules are aligned by hand and re-checked whenever plant hours change.
The honest gaps, both of them. First: if your arithmetic lands above the published rating, or the ductwork does not reach the rooms you want, no page should give you a machine count — send the plan and the index schedule to the contact page. Second: SOSA lists no purchasable refill oil for the waterless commercial machines and publishes no leather, tobacco or smoky fragrance for any diffuser; that fragrance is specified and quoted per property.
2. Do the volume arithmetic before you assume 10,000 sq ft is inside the rating. Ten thousand square feet at a plain ten-foot ceiling is 100,000 cubic feet, a little over 2,800 m³ — just inside up to 3,000 m³ and therefore a single-machine proposition. The same plan at twelve feet is roughly 3,400 m³, which is outside it. Put a double-height entrance hall into the drawing and you cross the line sooner again. At this size the section is not a detail, it is the deciding document, and the honest answer where the arithmetic lands above the rating is that a page cannot give you a number. Send the plan and the ceiling heights to the contact page. Meenar at ₹38,500 is the larger-property option, specified on enquiry rather than sized from a web page.
3. The duct decides the reach, not the floor plan. Even comfortably inside the rating, what actually gets scented is whatever that air system serves. If a third of your 10,000 sq ft sits behind doors the duct does not reach — a card room on its own split unit, a library with the door shut, a suite of meeting rooms — those rooms are outside the scheme whatever the coverage figure says, and in most cases they should be. The converse is the disqualifier: if the same supply also feeds the dining room or the bar counter, you cannot switch that off room by room, and dining stays neutral, so the duct becomes the wrong delivery route regardless of budget.
4. The schedule is part of the specification, and it has no automation behind it. A duct distributes only while the fan runs, so the fragrance schedule has to be a subset of the plant schedule — start after the fan starts, stop before it stops, and allow the morning fresh-air purge to do its work first. Aangan’s intelligent board carries programmable work and pause cycles and daily schedules, which makes that arrangement straightforward. What it does not carry is any digital connection: no building-management interface, no automation protocol, no smart-home link. The connection to the air handling unit is a genuine mechanical integration and the two schedules are aligned by hand.
5. Whichever route you take, the result you want is a fragrance nobody can locate. The reason a member can never find the diffuser in a well-scented building is that there is nothing to find: the fragrance is introduced into moving air upstream, so there is no source to walk towards and no gradient to climb. Waterless cold-air nebulising shatters undiluted oil into a dry nano-mist with no water, no dilution, no added humidity and no residue, and a sealed residue-free tank is what makes a machine safe to mount near joinery, electronics and a return grille. Alcohol-free, phthalate-free, paraben-free, IFRA-compliant, 0 ppm formaldehyde, composed in Pune. A portion of every order supports girl-child education through Nanhi Kali.
The precondition, the arithmetic, and the fallback
Three things have to be established in order, and each one can send the scheme somewhere different. None of them involves choosing a fragrance, which is why a good specification meeting for a club of this size spends its first half hour with a plant schedule on the table and the perfumer largely silent.
Aangan₹25,999Read the coverage claim carefully, because the qualifying clause is the most important part of it: up to 3,000 m³, roughly 8,000–10,000 sq ft, when connected to HVAC. A nebuliser does not project a fragrance across a floor. It introduces an extremely fine dry mist into air that is already moving, and the moving air does the distribution. Remove the moving air and you have a very good machine sitting in a room, covering that room. So establish this before anything else, and establish it with the person who services the plant rather than with the person who drew the interiors: is there an air handling unit, does it have ductwork, and which rooms does that ductwork actually reach. If a club of 10,000 sq ft is conditioned by a dozen wall-mounted indoor units, the elegant single-machine answer is not expensive, it is unavailable — and a supplier who quotes it anyway has not asked.
Vaayu₹11,999Coverage is published in cubic metres for a reason, and at this size the reason becomes arithmetic rather than principle. Ten thousand square feet under a plain ten-foot ceiling is 100,000 cubic feet, a little over 2,800 m³, which sits just inside a published rating of up to 3,000 m³ with very little to spare. Take the ceilings to twelve feet — not an unusual height in a club with any ambition — and the same floor plate holds roughly 3,400 m³, which is outside the rating altogether. Add a double-height entrance hall or a galleried stair over part of the plan and the figure moves again. This is the point at which a floor area stops being a specification and starts being a misleading summary. Write the ceiling height beside every room name, do the multiplication room by room rather than as one average, and you will know within an afternoon whether your club is a single-machine building, a single-machine building with nothing in hand, or a property that needs sizing properly on enquiry.
Mountain Breeze₹849A club that fails the precondition has not lost anything worth mourning. It has simply been told that its scheme is zoned, and a zoned scheme is what most of this cluster argues for in any case, because it lets arrival read clearly while a lounge sits deliberately below the level anyone would name. Mark the doors that stay shut in opening hours, draw a line round each connected area, and the 10,000 sq ft resolves itself into a handful of volumes of very unequal value. The entrance and the circulation spine earn the most, because every member passes through them with a nose that has been outside and nobody stands in them for hours. The lounge earns a setting of its own, chosen for the fourth hour. Meeting rooms, the boardroom, the library, the gym floor, the treatment rooms and the dining room earn nothing at all, and saying so is what makes the rest of the scheme believable to a chef and a long-standing member.
What the integrator actually needs at the mounting position
This is the part that is missing from almost every conversation about HVAC scenting, and it is the part that determines whether a commissioning visit takes an hour or a Saturday. The machine is small and light — 3.9 kg, 284 × 125 × 246 mm — which is exactly why it gets treated as a decision that can be left to site. It cannot. Four things have to exist at the chosen position before anyone arrives with a box. A DC 12V supply at 14W, which is a trivial load and a real low-voltage point that an electrical drawing has to show. A fixing that will carry a metal body of that weight with enough clearance around it to open the unit. An injection route into the supply side of the air handling unit — and here the questions to put to your HVAC contractor are specific: is there a spare spigot or does the duct need a boss made, where does that point sit relative to the filter bank, and can it be reached without taking the plant out of service on a weekday. And service access to an 800ml reservoir that a house engineer can reach standing up, rather than from a ladder through a ceiling grid above the members’ lounge.
Two smaller details save more trouble than their size suggests. The unit runs under 42 dB, which is inaudible in a plant room and entirely audible in a ceiling void over a quiet reading area at nine in the morning — so the acoustic question is about the position, not about the machine. And the tank is sealed and residue free, which in a commercial installation matters more than it sounds: it is what makes the unit safe to mount near joinery, near electronics, and next to a return grille, because there is no water, no dilution and nothing to deposit on a surface. That is a property of waterless nebulising rather than a feature, and it is the practical reason clubs stopped using water-based machines in plant positions. An ultrasonic machine throws a wet mist and adds humidity, which in an Indian club is very often the enemy rather than the tool.
Then there is the schedule, which belongs in the specification and not in a handover conversation. A duct distributes only while the fan is running; when the plant stops, the distribution stops with it and whatever is in the air leaves with the next air change. So the fragrance schedule is a subset of the plant schedule — starting after the fan, finishing before it, and staying out of the way of the morning fresh-air purge that a well-run club does before opening. Aangan’s intelligent PCB holds programmable work and pause cycles and daily schedules, which makes that easy to set and impossible to automate. There is no digital integration on any SOSA machine — no building-management interface, no automation protocol, no smart-home connection, no control-system driver — so nobody should design an interlock into a drawing. The connection into the air handling unit is a mechanical integration and a real one; it is simply not a data connection, and the two schedules are kept in step by a person with a written procedure.
The mounting-position checklist
Take this table to the meeting where the mechanical contractor, the electrical contractor and the house engineer are all in the room, which is the only meeting at which it can be settled cheaply. Every line in it costs nothing at drawing stage and something real once ceilings are closed.
| What is needed | The published figure | Who provides it | What happens if it is left to site |
|---|---|---|---|
| Low-voltage supply at the position ★ | DC 12V at 14W for the HVAC machine; DC 12V / 1A at 5W per zone unit | Electrical contractor, shown on the drawing | A visible adaptor on a finished wall, or a machine positioned where the socket happens to be |
| A fixing and clearance | Metal body, 3.9 kg, 284 × 125 × 246 mm | Main contractor or joiner | The unit ends up somewhere it cannot be opened for refilling |
| An injection point on the supply side | Connection to HVAC or AHU; the unit will also wall-mount or lay flat | Mechanical contractor, with the filter position confirmed | A boss cut into a live duct at a weekend, at weekend rates |
| Reservoir access from standing height | 800ml reservoir; weeks between refills on business-hours schedules | Agreed with the house engineer before ceilings close | Refilling becomes a two-person job above a members’ lounge |
| An acoustically sensible position | Under 42 dB on the HVAC machine, under 38 dB on the zone unit | Whoever chooses the void or the plant room | A faint running sound over a quiet reading area in the morning |
| A written schedule inside the plant hours | Programmable work and pause cycles plus daily schedules on the board | The named person who owns the fragrance spec | The machine runs while the fan is off and the fragrance goes nowhere |
| What is not needed, because it does not exist | No building-management interface, automation protocol or smart-home link on any SOSA machine | — | An interlock drawn into a control schematic that can never be commissioned |
Air system · Aangan₹25,999See it → Zone · Vaayu₹11,999See it → Larger property · Meenar₹38,500See it →
If there is no air handling unit: the zoned 10,000 sq ft club
Assume the plant schedule came back as a list of split units. The scheme is now a zoning exercise, and the discipline is to resist the arithmetic that says ten thousand divided by a coverage figure equals a number of machines. That sum is wrong for two reasons. It uses floor area where the rating is a volume, and it assumes the whole property is one connected body of air when a club of this size is never fewer than half a dozen. What you are dividing is not the building. It is the list of volumes that earn a setting.
In practice a 10,000 sq ft club resolves into an arrival volume — the vestibule, the lobby and the reception approach, which behave as one if the doors between them are open in service; a circulation spine of corridors and stair halls, which is usually the best value in the entire scheme because every member passes along it repeatedly and nobody stands in it; a members’ lounge, which takes the same identity at a markedly lower setting; and then a long list of rooms that take nothing. Two or three units serve that, set independently, each key-locked after commissioning. I will not turn it into a formula: the number depends on the connected volume of each of those areas rather than the total, on the ceiling heights, on where the closed doors fall, on whether an open stair joins two floors into one volume, and on how many hours each area is genuinely occupied. A galleried stair or a lift shaft behaves as a chimney, carrying warm air and fragrance to a floor nobody intended to scent, which occasionally means one machine does the work of two and occasionally means a setting has to come down.
One last point about air change, because it cuts both ways and is frequently misread as a fault in the machine. Air that leaves takes the fragrance with it. A busy club lobby with automatic doors and a high air-change rate needs the fragrance replaced continuously, and the same machine on the same setting will behave quite differently in a sealed upstairs room where it accumulates. Air conditioning helps by distributing evenly and hurts by removing faster, and that is not a contradiction to resolve, it is the reason a schedule matters more than an intensity. If the lobby seems thin at six in the evening, the useful question is what changed about the air movement at six, not whether the composition should be stronger. Most complaints of weak fragrance are distribution complaints, and the free test is to stand close to the source: if it is clearly present there, the fragrance is fine and the delivery is not.
The scheme in buying order — and the two gaps
Here is the order I would write a 10,000 sq ft purchase in. The first three lines cost nothing and settle almost everything, and the last line is the pair of things this range does not contain, in the table rather than in a footnote because they come up in the first meeting every time.
| Step | What it is | Why it comes here in the order | Cost |
|---|---|---|---|
| 1. Establish the precondition ★ | Is there an AHU with ductwork, which rooms does it reach, and which rooms does it also reach that you want neutral | Because the published whole-floor coverage belongs to that connection and to nothing else | No purchase |
| 2. Do the volume arithmetic room by room | Ceiling heights written on the plan, a section where there is a mezzanine or a galleried stair | At this size the height decides whether the club is inside the rating at all | No purchase |
| 3. Sort the air and the moisture first | A fresh-air purge before opening, dry carpets, drain traps serviced, humidity brought down | Fragrance laid over a stale building produces a mixture members read as a cover-up | No purchase |
| 4a. Aangan on the air handling, if the precondition passes | Up to 3,000 m³ on that connection, 800ml, under 42 dB, DC 12V at 14W, programmable cycles and daily schedules | One reservoir, one schedule, no equipment in any room and no source a member can locate | ₹25,999 |
| 4b. Vaayu per zone, if it does not | Up to 1000 m³ each, DC 12V / 1A at 5W, under 38 dB, 400ml, 1h to 24h windows, key-locked | Arrival firm, circulation light and continuous, lounge deliberately below naming level | ₹11,999 each |
| 5. Write the spec, lock the settings, name the owner | Fragrance, position, intensity, schedule inside plant hours, refill cadence, the unscented list | A fragrance only becomes a system when it is written down and one person owns it | No purchase |
| No digital integration, and no listed commercial refill: the honest gaps | The AHU connection is mechanical and real; there is no building-management interface, automation protocol, smart-home link or control-system driver on any SOSA machine. And no purchasable refill oil is listed for the waterless machines — that fragrance is specified and quoted per property, and no leather, tobacco or smoky direction is published for any diffuser | Said plainly, because an interlock drawn now can never be commissioned, and because a committee will ask about running cost in the first meeting | Quoted |
Versailles
The first ten thousand square foot club I specified taught me to put the precondition in the first sentence rather than the fourth. The general manager had read the coverage figure, decided one machine would do the building, and put that number in a committee paper. He was not wrong about the figure. He had simply not noticed the words that follow it, and neither had the two suppliers who quoted before me. The club had no air handling unit at all. It had nine split units, a lot of good joinery and a single return grille in the lobby ceiling that went nowhere useful.
What we did instead was walk it with the doors closed as they are in service, which took an hour and changed the whole shape of the proposal. The building resolved into an arrival volume, a long corridor that connected almost everything, a members’ room that was genuinely one volume, and about a dozen rooms that we agreed on the spot should be left alone — the two card rooms, the library, the boardroom, the treatment rooms, the gym and the dining room. That left three volumes worth a machine and one of them arguable. The committee paper was rewritten around a corridor, which is not a glamorous line item and was the best money the club spent that year.
The second thing I would pass on is about the mounting position, because it is where the money quietly goes. On the clubs where the HVAC route did apply, the difference between a straightforward install and an awkward one was never the machine. It was whether somebody had drawn a low-voltage point at the position, whether the duct had a spigot or needed a boss cutting into it on a Saturday, and whether the reservoir could be reached standing up. Settle those three with your mechanical and electrical contractors while the ceilings are still open, write the schedule down inside the plant hours, and then set the level once, lock what can be locked, and judge it only by walking in from the car park with a member beside you. Everything we make is composed in Pune, and a part of every order funds a girl’s classroom through Nanhi Kali.
Frequently asked questions
- Scenting 2,000 sq ft — one zone, honestly, and a budget that stays largely unspent.
- The 5,000 sq ft fork — zones or one air system, and how to tell which side you are on.
- Zoning at 20,000 sq ft and the multi-floor club — where zoning replaces sizing altogether.
- How many machines a club needs — why the honest answer is a method rather than a number.
- One large machine or several zones — the closed-door boundary decides it, not the budget.
- Double-height lobbies and central AC, corridors, lifts and stairs — the volume a plan hides, and where air actually goes.
- When reeds stop being enough — the crossover, in connected volume and dwell time.
- Brand: the SOSA founder story.
SOSA commercial scenting — facts verified August 2026: Vaayu ₹11,999, waterless cold-air nebulising, coverage up to 1000 m³ ≈ 2,000–3,000 sq ft, 400ml refillable sealed tank lasting up to about 90+ days depending on intensity and hours, Bluetooth app plus onboard buttons, run windows of 1h / 4h / 8h / 24h, day selection, adjustable intensity, auto-stop and key-lock, under 38 dB, freestanding, wall-mounted or HVAC-return mounting, DC 12V / 1A at 5W, CE, RoHS and SGS, black and white. Aangan ₹25,999, HVAC or AHU connection or standalone wall-mount or lay-flat, coverage up to 3,000 m³ ≈ 8,000–10,000 sq ft, 800ml reservoir, under 42 dB, DC 12V at 14W, intelligent PCB with programmable work and pause cycles and daily schedules, metal body 3.9 kg at 284 × 125 × 246 mm, black or white, one-year warranty, imported; it has no app and no Bluetooth, and no certifications are published for it. Meenar ₹38,500 is the larger-property option and is specified on enquiry; no coverage figure is published for it here. Ultrasonic machines: Sukoon ₹1,899 at 270–320 sq ft, Boond ₹899 at up to about 150 sq ft, Megh ₹3,499 with a six-litre tank and around 100 hours of runtime but only about 215 sq ft of coverage. Reed diffusers ₹749–₹849 for 50ml lasting 6–8 weeks and ₹1,249–₹1,349 for 130ml lasting 14–18 weeks, six fibre reeds, alcohol-free, phthalate-free, paraben-free, IFRA-compliant, 0 ppm formaldehyde, heat-stable CCT carrier, refillable glass bottle, tested at 45°C and 85% RH, composed in Pune. The Hotel Collection fragrance oils are water-based and ultrasonic-only at 15ml ₹299, 100ml ₹999 and 300ml ₹1,799; they are not for reed diffusers and not for the waterless commercial machines. No purchasable refill oil is listed for the waterless commercial machines — that fragrance is specified and quoted per property. SOSA publishes no leather fragrance in any format and no tobacco or smoky fragrance for any diffuser. SOSA sells no air purifier, no dehumidifier and no room spray for interiors, and makes no health, air-quality, VOC or mould claim. No dealer programme, reseller margin, trade price, territory or service contract is published. 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. Prices subject to change — see the live product pages.