The schedule for a 4pm viewing: the day before, open the property, cross-ventilate, water down every drain trap and identify anything that is a defect rather than a smell. 11am, close up and let the flat come to temperature, air conditioning on if it is hot. 2pm, machine on low at the entrance, 4h timer. 3.30pm, walk in from the lift as a buyer would and adjust downwards. 4pm, arrival, machine still on low.
What changes it: property size, whether it is occupied, whether it has been shut for weeks, monsoon against dry season, and whether the air conditioning is running.
Back-to-back viewings: set it once in the morning and leave it. A level held all day beats repeated intervention and uses less fragrance than three restarts.
2. The day before, not the same morning: open the property. Windows on opposite walls, internal doors wedged, cupboards and wardrobes open, bins gone, a mug of water down every drain trap in the flat, and a proper look for anything that is a defect rather than a smell.
3. At about 11am, close it up and let it come to temperature. Air conditioning on if it is hot, so the flat is settled at 24 or 25 degrees rather than working towards it when the buyer arrives. Windows shut from this point, or the two hours of scenting is going out of them.
4. At 2pm, machine on, low, in the entrance zone, 4h timer. Waist height, back from the door, out of the draught. It will be at its level long before the buyer is in the lift.
5. At 3.30pm, walk in from the lift exactly as the buyer will, and adjust downwards. This is the only quality check that works, because you cannot judge a flat you have been standing in. Upwards is not an available direction at this point.
6. At 4pm the machine is still running on low. Not switched off for the arrival, not turned up for it. The timer takes it to six, which covers a late buyer and a second look without anybody thinking about it.
A portion of every order supports girl-child education through Nanhi Kali.
A 4pm viewing, hour by hour
Take the ordinary case and put real times against it: an empty 2,000 sq ft apartment on the eleventh floor, a serious buyer at four o'clock on a Saturday, and one machine. The schedule that follows is not a suggestion about how much effort to make. It is an ordering problem, and the order matters because the jobs run at different speeds — ventilation takes a day, temperature takes three hours, fragrance takes two, and the quality check takes ten minutes and has to be last. Get the sequence right and the property is finished before anybody arrives, which is the entire objective.
The timetable
The whole schedule for a four o'clock viewing in an empty 2,000 sq ft flat, with the clock time against each job and the reason it sits where it does. The third column is the useful one, because it says what happens if the job moves — and almost every one of these fails by being done too late rather than too early.
| Time | The job | Why it is at this hour | Cost |
|---|---|---|---|
| 2:00pm ★ | Vaayu on, lowest usable setting, entrance zone, 4h timer | Working output in minutes and a settled viewing level well inside two hours. Started later, the room is still climbing at four | ₹11,999 once |
| Day before, morning | Open the property, cross-ventilate on opposite walls, doors and cupboards open | Air exchange is a day-long job. Two hours will not clear a flat that has been shut | ₹0 |
| Day before, same visit | Water down every drain trap, bins out and washed, soft furnishings aired | A dry trap is an open pipe to the stack and the commonest smell in a vacant flat. Ten minutes, holds a fortnight | ₹0 |
| Day before, same visit | Identify anything that is a defect rather than a smell | If it needs a contractor, you need the vendor on the phone today rather than a machine on Saturday | ₹0 |
| 11:00am | Close up. Air conditioning on if hot, to reach and hold 24–25°C | Temperature must be settled, not starting. Windows must be shut before the machine goes on or the fragrance leaves with the air | ₹0 |
| 3:30pm | Go down, come up in the lift, walk the corridor, unlock and take the reading | You cannot judge a flat from inside it. The only permitted adjustment at this point is downwards | ₹0 |
| 4:00pm | Arrival. Machine still on low, timer running to six | Switching it off produces a falling level through the viewing; turning it up produces a rising one. Neither is what you want | ₹0 |
2pm · 4h timer · low₹11,999Shop → 
One scent, every listingfrom ₹299Shop → 
Sales gallery · 3,000 m³₹25,999Shop →
The five variables, and a Saturday of viewings
Now the things that move the schedule, in the order they are likely to apply to you. Size first: two hours is calibrated for a normally sealed flat of up to about 2,000 sq ft with one machine at the entrance. At 3,000 sq ft and above, the constraint stops being time and becomes distribution — a bigger machine in the same hall reaches the same rooms — so add an hour and, above roughly 3,000 sq ft of connected volume, add a second Vaayu rather than more intensity. The Aangan at ₹25,999 covers up to 3,000 m³ and is for a sales gallery, a clubhouse or an 8,000 to 10,000 sq ft villa, not for a large apartment. Occupancy second: an occupied property needs less of everything. It has been lived in that morning, its traps are wet, its air has been moving, and it already has a character of its own — ninety minutes on the lowest setting is plenty, and the household instructions matter more than the machine does. A property shut for weeks is the opposite case and the timing advice barely applies: it needs a full day of airing, possibly two, before the two-hour rule means anything at all. Scenting a flat that has been closed since June without airing it first produces a property that smells of both things, which is worse than either. Season fourth: monsoon changes the machine rather than the clock. A water-based ultrasonic adds 30 to 50 millilitres of water an hour to air that is already at ninety per cent humidity in a flat with no air conditioning running, which is the wrong direction in a property with stone floors and closed windows — the waterless Vaayu exists precisely for this. And air conditioning fifth, which cuts both ways: it distributes fragrance around a flat far better than still air does, and it also removes it faster, so a heavily air-conditioned property may want the full two hours where a still one is settled in ninety minutes. Keep the machine out of the direct path of a vent either way.
Then the case that changes the arithmetic completely, which is a day of appointments rather than one. For a Saturday with viewings at eleven, one, three and half past four, do not run the schedule four times. Set the machine once at nine in the morning, on low, and leave it running all day. The reasoning is the same physics as the two-hour rule, simply applied for longer: the property arrives at a level in the first hour or two and then holds it, and every buyer through the door meets the same settled condition rather than whatever stage of a restart they happen to coincide with. Intervening between appointments is actively worse than leaving it alone — turning it up for the important buyer at three produces a climb precisely when you least want one, and switching it off between viewings produces a flat that is falling away at one and climbing again at three. It is also cheaper. A day on the low setting uses less fragrance than three separate high-setting catch-ups, and the 400ml tank is rated for about 75 days of ordinary running, so a full Saturday costs you a fraction of a fill. Use the 8h or 24h timer for this rather than the 4h, set it to stop after the last appointment, and leave the machine in the flat behind its key-lock. At 0.9 kg and smaller than a shoebox it is easier to leave than to carry away, and the whole point of a portable machine is that one of them can serve a portfolio rather than one listing. Between the appointments themselves, open the front door and let the hall breathe for five minutes after each departure and change nothing else.
Then the constraints and the honest edges of the schedule. None of these timings helps a property with a fault, and a timetable is a particularly easy place to hide one, so I will say it in the middle of the operational section rather than at the end: if the smell returns after a full day of proper airing, it has a physical cause. Damp, a leak, a chronic drain, smoke damage. That is a material fact about the property — find it, fix it or disclose it, and scent a building that is genuinely sound. On the other machines: the Sukoon at ₹1,899 is a sound choice for a single occupied room of 270 to 320 sq ft, and it takes the water-based Hotel Collection bottles at three to six drops per tank, but it is ultrasonic and belongs where somebody lives rather than in a sealed listing. The Boond at ₹899 and Megh at ₹3,499 are the same argument at other sizes. A reed diffuser from ₹749 has no schedule at all — 24 to 72 hours to establish, then it holds — which suits a property shown over months and cannot be aimed at Saturday at four. A candle from ₹379 scents a room in fifteen or twenty minutes and must be attended and put out, so it belongs only where somebody is present, and an unattended flame in a vacant flat is an insurance problem rather than a styling decision. And a schedule executed perfectly still only buys presentation. It changes how the property feels and how the visit is remembered. It does not move a price or an offer, and I have no number to offer you for either.
The SOSA edit
Ordered as a purchase list rather than as a timetable, for a realtor setting this up for the first time. The first row is the day-before work and it is free. The fifth row is the machine I would talk most readers out of, and the last row is the honest absence.
| Buy | What it is | When it earns its place | Price |
|---|---|---|---|
| 1. The day-before hour ★ | Cross-ventilation, cupboards open, water down every trap, a proper look for defects | Free, slow, and the only part of the schedule that cannot be compressed. Do this even if you buy nothing | ₹0 |
| 2. SOSA Vaayu | Waterless, 1000 m³, 400ml for about 75 days, 1h/4h/8h/24h timers, app, key-lock, under 38 dB, 0.9 kg | The 4h timer for a single viewing, the 8h or 24h for a Saturday of them. On at two, off at six, from a phone | ₹11,999 |
| 3. Quiet Luxury | White tea, bergamot and cedar. Four hotel-inspired scents ship with the machine | The same bottle in every listing, so that two hours means the same thing to you in every building | from ₹299 |
| 4. A second Vaayu | A second identical machine for a separate wing, floor or a property above 3,000 sq ft of connected volume | Distribution rather than intensity is the constraint in a large property. Two at ₹23,998 still cost less than one Aangan | ₹11,999 |
| 5. Aangan | Up to 3,000 m³ or roughly 8,000–10,000 sq ft, HVAC or standalone, 800ml, under 42 dB | Sales galleries, clubhouses and very large villas only. In a 2,000 sq ft flat this is overselling | ₹25,999 |
| Wrong clock: reed diffusers | 24–72 hours to establish, then steady, with no timer and no setting | Right for a listing shown over months, wrong for a viewing at four tomorrow. Printed so you buy it for the correct job | from ₹749 |
Versailles
I like this question because it has a real answer, and because the real answer is duller than the one people want. Two hours. On low. Set the timer and stop thinking about it. What makes it worth a whole page is that the two hours only works if the twenty-four hours in front of it happened, and that is the part that gets skipped — I have lost count of the flats I have been described where the machine was set beautifully at two o'clock into air that nobody had changed since the last viewing three weeks earlier.
The other half of what I would say is about back-to-back Saturdays, because that is where the money and the effort actually go. Set it once in the morning and leave it. Every buyer that day walks into the same settled property, you never once stand in a flat wondering whether to turn something up, and it uses less fragrance than three catch-ups would. A machine that weighs 0.9 kg, locks, stops itself and can be started from a car park is not really a fragrance product on a day like that. It is a way of removing one decision from an afternoon that has quite enough of them, and that is most of what I think professional equipment is for.
Everything is made and supported from Pune, and a part of every order funds girl-child education through Nanhi Kali. You get a space that smells like somewhere considered; a girl gets a classroom. That equation has always felt right to me.
Frequently asked questions
- Should I start scenting a property before the buyer arrives? — why early beats strong.
- Should the entrance have the strongest fragrance impact? — where the machine goes.
- Keeping a property consistently fragranced during back-to-back viewings — a full day of appointments.
- How to scent a 2,000 sq ft luxury apartment before a viewing — the same flat, in detail.
- Brand: the SOSA founder story.
Facts verified August 2026: Product facts used in this guide. SOSA Vaayu ₹11,999: waterless cold-air nebulising diffuser, atomises undiluted fragrance oil to a dry residue-free nano-mist, coverage up to 1000m³ (approximately 2,000–3,000 sq ft), 400ml refillable tank lasting up to about 75 days per fill, Bluetooth app plus onboard control, 1h/4h/8h/24h timer scheduling, adjustable intensity, under 38 dB, DC 12V/1A at 5W, 165 × 80.5 × 215 mm and 0.9 kg, freestanding or wall/HVAC mounted, auto-stop and key-lock, CE, RoHS and SGS certified, supplied with four hotel-inspired fragrances. SOSA Aangan ₹25,999: HVAC-connected or standalone commercial nebulising diffuser, coverage up to 3,000m³ (roughly 8,000–10,000 sq ft), 800ml reservoir, metal body, programmable schedules, under 42 dB. Ultrasonic machines are water-based and consume 30–50 ml of water an hour: Sukoon ₹1,899 (500ml, 270–320 sq ft, 16–18 hours on low, 3–6 drops per tank, steady/2H/4H timers, three 15ml Hotel Collection scents included), Boond ₹899 (300ml), Megh ₹3,499 (6 litres). Hotel Collection water-based fragrance 15ml ₹299, 100ml ₹999, 300ml ₹1,799, Pack of 7 at 15ml ₹1,799 against ₹2,093 bought singly; the Vaayu and Aangan take their own undiluted oil rather than these water-based bottles. Reed diffusers (separate alcohol-free line) from ₹749, requiring 24–72 hours to reach their working level. Scented candles from ₹379, scenting a room in roughly 15–20 minutes but requiring attendance. Free shipping above ₹499. Timings: a nebulising diffuser reaches a working level within minutes and a stated viewing level well inside two hours. This guide makes no claim that fragrance affects a property's price, offer level or time on market; it is presentation, in the same category as photography, styling and lighting. Fragrance must never be used to conceal a material defect. SOSA is not affiliated with or endorsed by any hotel brand. Prices subject to change — see the live product pages.