★ SOSA Vaayu · the size threshold
Coverage in this category is a volume figure wearing a square-footage costume — measure in cubic metres and the decision makes itself
★ ★ ★ ★ ★
★★★★★
"Paced the ground floor, multiplied by the ceiling, and got 190 cubic metres. That one number ended a month of arguing with my husband about it."
Villa owner · measured first
★★★★★
"Our hall is double height so the floor plan lied to us by nearly half. The height section explains why our old machine kept failing."
Double-height hall
★★★★★
"Two Sukoons at ₹3,798 against one big machine at ₹11,999 — I had the numbers in front of me and chose the two."
Two machines, two floors
★★★★★
"Honest that the published square footage is a derived figure and not a promise. Rare thing to read on a product's own blog."
Airbnb host · 3BHK
★★★★★
"Our farmhouse common area came to 410 cubic metres. That is when the expensive machine stopped looking expensive."
Vaayu ₹11,999
★★★★★
"The bit about closed doors not counting toward your volume saved me buying twice what I needed."
Villa owner · door audit
★★★★★
"Paced the ground floor, multiplied by the ceiling, and got 190 cubic metres. That one number ended a month of arguing with my husband about it."
Villa owner · measured first
★★★★★
"Our hall is double height so the floor plan lied to us by nearly half. The height section explains why our old machine kept failing."
Double-height hall
★★★★★
"Two Sukoons at ₹3,798 against one big machine at ₹11,999 — I had the numbers in front of me and chose the two."
Two machines, two floors
★★★★★
"Honest that the published square footage is a derived figure and not a promise. Rare thing to read on a product's own blog."
Airbnb host · 3BHK
★★★★★
"Our farmhouse common area came to 410 cubic metres. That is when the expensive machine stopped looking expensive."
Vaayu ₹11,999
★★★★★
"The bit about closed doors not counting toward your volume saved me buying twice what I needed."
Villa owner · door audit
✓ Vaayu · up to 1000m³ · 400ml tank · 90+ days a fill · under 38 dB · 5W · CE, RoHS, SGS ✓ Sukoon ₹1,899 covers 270–320 sq ft ≈ 75–90m³ at a 3m ceiling · Boond ₹899 · ~150 sq ft ✓ No separate Vaayu refill oil is sold today — confirm availability with SOSA before buying
Founder Diaries · Large-Space Scenting · The Size Threshold
The band: under about 150m³, buy a Sukoon at ₹1,899 or reeds from ₹749. Above about 250m³, a cold-air machine is the honest answer. Between the two, it depends on doors, labour and control.
Why the published figure is a range: 1000m³ ÷ a 3m ceiling ≈ 333m² ≈ 3,585 sq ft, but 1000m³ ÷ a 4.5m ceiling ≈ 222m² ≈ 2,390 sq ft. Same machine, same volume, a 1,200 sq ft difference.
Closed doors do not count. Only measure what is genuinely open to the machine's position.
Mountain Breeze₹849 · 50mlHeight is the multiplier nobody prices. A 40m² hall under a standard 3m ceiling is 120m³; the same 40m² under a 6m double-height void is 240m³ — the floor plan is identical and the scenting problem has doubled. Scented air is warm air and it rises, so a void does not merely add volume, it adds volume in the part of the room where nobody is standing. An open stairwell behaves the same way, drawing air upward like a chimney and quietly exporting your fragrance to the landing. Measure the true height at its highest point in any double-height space and include it, then place the machine low and aimed into where people walk rather than up into the void. This is also the honest reason our published figure is 2,000–3,000 sq ft rather than a single number: the same 1000m³ becomes very different floor areas at 3m, 4m and 5m.
SOSA Vaayu specifications (verified from the live product page, August 2026): ₹11,999 (the product page displays a rounded ₹12,000). Waterless cold-air nebulisation — pressurised air atomises undiluted fragrance oil into a dry nano-mist; no water, no heat, residue-free. Coverage up to 1000m³, about 2,000–3,000 sq ft. 400ml refillable tank, 90+ days per fill at a mid intensity setting. Bluetooth app plus onboard buttons, 1h / 4h / 8h / 24h timers, adjustable mist intensity, auto-stop and key-lock. Under 38 dB. DC 12V / 1A, 5W. 165 × 80.5 × 215 mm, 0.9 kg, black or white. Freestanding or wall / HVAC mount. CE, RoHS and SGS certified. Ships with four SOSA Hotel Collection fragrances at 100ml each (400ml in total) in one of three combos chosen at checkout. SOSA does not currently sell a separate Vaayu refill oil; the 400ml supplied in the box is the fragrance available at the time of writing, and buyers who need long-term supply should confirm current refill availability with SOSA before purchasing. The cold-air oil supplied with the Vaayu is a different product from the water-based Hotel Collection sold for ultrasonic machines (15ml ₹299 · 100ml ₹999 · 300ml ₹1,799), which must not be used in a Vaayu despite sharing scent names. Other SOSA machines: Boond 300ml ₹899 (~150 sq ft) · Sukoon 500ml ₹1,899 (270–320 sq ft) · Megh 6L ₹3,499 (~215 sq ft — a runtime and humidity machine, not a coverage upgrade) · Aangan ₹25,999 (~8,000–10,000 sq ft) · Meenar ₹38,500 (12,000–18,000 sq ft) · Safar car diffuser ₹3,999. Reed diffusers 50ml ₹749–₹849 (6–8 weeks) · 130ml ₹1,249–₹1,349 (14–18 weeks) · duo sets ₹1,498–₹1,598 · oil-only refills 300ml ₹2,399 / 500ml ₹3,499. Runtime, consumption and coverage figures are manufacturer specifications and vary with intensity setting, run hours, ceiling height, ventilation and season; any per-month or per-day figure in this guide is arithmetic on those specifications, not a measurement. Electricity costs vary by state tariff. No claim is made that scenting affects ratings, reviews, bookings, occupancy, revenue, health, mood or air quality. Free shipping above ₹499. A portion of every order supports girl-child education through Nanhi Kali. Prices subject to change — see the live product pages.
Every coverage number in this industry is a volume figure wearing a square-footage costume. The Vaayu is specified at up to 1000m³ and that specification is then translated, honestly enough, as about 2,000 to 3,000 square feet — a range rather than a figure, because the translation depends entirely on your ceiling. So the question "what size space makes a cold-air machine worth buying" cannot be answered in square feet at all. It has to be answered in cubic metres, and the answer is a band rather than a line: roughly 150 to 250m³ of genuinely connected air. Below that band there is a cheaper right answer. Above it there is not. Inside it, three tiebreakers decide, and none of them is about strength.
Quick answers — read this first
Measure it yourself in two minutes: pace the length and width of every space that shares air, multiply each by its true ceiling height, and add them up. That total in cubic metres is the only number that matters.The band: under about 150m³, buy a Sukoon at ₹1,899 or reeds from ₹749. Above about 250m³, a cold-air machine is the honest answer. Between the two, it depends on doors, labour and control.
Why the published figure is a range: 1000m³ ÷ a 3m ceiling ≈ 333m² ≈ 3,585 sq ft, but 1000m³ ÷ a 4.5m ceiling ≈ 222m² ≈ 2,390 sq ft. Same machine, same volume, a 1,200 sq ft difference.
Closed doors do not count. Only measure what is genuinely open to the machine's position.
The short answer
Short answer: a cold-air nebuliser starts being worth its price at roughly 150 to 250 cubic metres of connected volume — for most Indian homes that means a ground floor of about 550 to 900 square feet where the living, dining, kitchen and hall are genuinely open to one another, or rather less than that if the ceilings are high. Under 150m³, a Sukoon at ₹1,899 or two of them at ₹1,899 × 2 = ₹3,798 will do it for a fraction of the money.
The method: length in metres × width in metres × ceiling height in metres = cubic metres, room by room, then add only the rooms that share air with the spot where the machine will stand. Use 1 square metre ≈ 10.76 square feet and 1 cubic metre ≈ 35.3 cubic feet if you want to convert. Measure the real height, including any double-height void — that is where most people's arithmetic goes wrong by a third or more.
In this guide
Under ~90m³
Sukoon · ₹1,899 · 270–320 sq ft
Above ~250m³
Vaayu · ₹11,999 · up to 1000m³
Under ~40m³
Boond · ₹899 · ~150 sq ft
Straight answer
How big does a space have to be before a cold-air diffuser is worth it?
1. Measure in cubic metres, not square feet. Length × width × ceiling height, per space, in metres. Add only the spaces that share air. Everything below follows from that one number.
2. Under about 90m³ — say a 320 sq ft room at a 3m ceiling — it is definitely not worth it. That is Sukoon territory at ₹1,899, with a remote and steady, 2H and 4H timers.
3. Between about 90 and 150m³, it is still usually not worth it. Two Sukoons at ₹1,899 × 2 = ₹3,798 placed at opposite ends of the volume will do more for a third of the money than one machine trying to cross it.
4. Between about 150 and 250m³ is the honest grey band. Both answers work. Choose by how many closed doors there are, how much attention you are prepared to give the setup, and whether you want scheduled control.
5. Above about 250m³ of connected volume, the cold-air machine is the answer and the alternatives stop being credible — you would need four or five ultrasonics, four or five tanks and four or five sets of timers.
6. The ceiling changes everything. 1000m³ ÷ 3m ≈ 333m² ≈ 3,585 sq ft; 1000m³ ÷ 4.5m ≈ 222m² ≈ 2,390 sq ft. That is the arithmetic behind the published "2,000–3,000 sq ft" band, and it is why a double-height room eats capacity you did not know you were spending.
7. Above 1000m³ you are out of this machine's range entirely and into commercial equipment — the Aangan at ₹25,999 for roughly 8,000–10,000 sq ft, or the Meenar at ₹38,500 for 12,000–18,000 sq ft.
8. Whatever your number, ask about supply before you spend. SOSA does not currently sell a separate Vaayu refill oil; the 400ml in the box, specified at 90+ days a fill, is today's whole supply. Confirm current availability with SOSA before purchasing.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
2. Under about 90m³ — say a 320 sq ft room at a 3m ceiling — it is definitely not worth it. That is Sukoon territory at ₹1,899, with a remote and steady, 2H and 4H timers.
3. Between about 90 and 150m³, it is still usually not worth it. Two Sukoons at ₹1,899 × 2 = ₹3,798 placed at opposite ends of the volume will do more for a third of the money than one machine trying to cross it.
4. Between about 150 and 250m³ is the honest grey band. Both answers work. Choose by how many closed doors there are, how much attention you are prepared to give the setup, and whether you want scheduled control.
5. Above about 250m³ of connected volume, the cold-air machine is the answer and the alternatives stop being credible — you would need four or five ultrasonics, four or five tanks and four or five sets of timers.
6. The ceiling changes everything. 1000m³ ÷ 3m ≈ 333m² ≈ 3,585 sq ft; 1000m³ ÷ 4.5m ≈ 222m² ≈ 2,390 sq ft. That is the arithmetic behind the published "2,000–3,000 sq ft" band, and it is why a double-height room eats capacity you did not know you were spending.
7. Above 1000m³ you are out of this machine's range entirely and into commercial equipment — the Aangan at ₹25,999 for roughly 8,000–10,000 sq ft, or the Meenar at ₹38,500 for 12,000–18,000 sq ft.
8. Whatever your number, ask about supply before you spend. SOSA does not currently sell a separate Vaayu refill oil; the 400ml in the box, specified at 90+ days a fill, is today's whole supply. Confirm current availability with SOSA before purchasing.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
TL;DR: measure length × width × height in metres for every connected space and add them. Under ~90m³ buy a ₹1,899 Sukoon. Between ~90 and ~150m³ buy two, at ₹3,798. Between ~150 and ~250m³ it is a genuine toss-up decided by doors and labour. Above ~250m³ the ₹11,999 cold-air machine is the honest answer, up to its 1000m³ ceiling.
The machine the threshold refers to
SOSA Vaayu · waterless cold-air nebuliser ₹11,999
Pressurised air atomises undiluted fragrance oil into a dry nano-mist — no water, no heat, no residue — which is why its rating is a volume figure of up to 1000m³ rather than a room size. 400ml refillable tank specified at 90+ days a fill at a mid intensity setting, 1h/4h/8h/24h timers with adjustable intensity, auto-stop and key-lock, Bluetooth app plus onboard buttons, under 38 dB, DC 12V/1A at 5W, 165 × 80.5 × 215 mm and 0.9 kg, freestanding or wall and HVAC mounted, CE, RoHS and SGS certified. Ships with four Hotel Collection fragrances at 100ml each in one of three combos chosen at checkout. Note before buying: no separate refill oil is sold today.
Part one — how to measure the number this whole decision turns on
You need a tape or a phone, five minutes, and a willingness to be unsentimental about which parts of your home are actually one space. The number you are after is connected volume in cubic metres: how much air a source standing at one point can plausibly reach without passing through a closed door. It is not the property's built-up area, it is not the figure on the sale deed, and it is not the sum of the rooms you would like to smell nice. Almost every over-purchase in this category — ours included — begins with somebody comparing a builder's square-footage figure against a coverage rating, which compares two things that were never measuring the same quantity.
1
STEP ONE · THE SUM
Length × width × height, in metres, per space
Pace it if you have no tape — an adult stride is close enough to a metre for this purpose, and the decision is not sensitive to ten per cent. A living area of 7m × 5m under a 3m slab is 7 × 5 × 3 = 105m³. A dining area of 4m × 4m at the same height is 4 × 4 × 3 = 48m³. An entrance hall of 3m × 2.5m is 3 × 2.5 × 3 = 22.5m³. Added together that is 105 + 48 + 22.5 = 175.5m³, which lands inside the grey band. Do this for every space, write the numbers down, and resist rounding upward — inflating your own volume is how people talk themselves into a machine. If you prefer imperial, 1 square metre ≈ 10.76 square feet and 1 cubic metre ≈ 35.3 cubic feet, but do the multiplication in metres first and convert afterwards.
The rule: a number you paced yourself beats a number from a brochure, because only one of them describes your ceiling.
2
STEP TWO · THE HEIGHT NOBODY COUNTS
Voids, mezzanines and stairwells are volume too
Mountain Breeze₹849 · 50mlHeight is the multiplier nobody prices. A 40m² hall under a standard 3m ceiling is 120m³; the same 40m² under a 6m double-height void is 240m³ — the floor plan is identical and the scenting problem has doubled. Scented air is warm air and it rises, so a void does not merely add volume, it adds volume in the part of the room where nobody is standing. An open stairwell behaves the same way, drawing air upward like a chimney and quietly exporting your fragrance to the landing. Measure the true height at its highest point in any double-height space and include it, then place the machine low and aimed into where people walk rather than up into the void. This is also the honest reason our published figure is 2,000–3,000 sq ft rather than a single number: the same 1000m³ becomes very different floor areas at 3m, 4m and 5m.
The tell: a room that smells fine on the mezzanine and of nothing on the sofa is a stratification problem, not a capacity one.
3
STEP THREE · THE SUBTRACTIONS
Take out everything behind a door
Now walk the property as you actually use it and strike out every space whose door is shut for most of the day. Bedrooms, the study, bathrooms, the utility, the guest suite. A closed door is a wall, and it stays a wall no matter what the machine cost. Those rooms are a separate problem with a separate, cheaper solution: a 50ml reed diffuser at ₹749–₹849 lasting 6–8 weeks at six fibre reeds, or a 130ml at ₹1,249–₹1,349 for 14–18 weeks. What remains after the subtraction — the hall, the living and dining, the passage, the kitchen if it is open — is your real connected volume, and it is often half of what people first estimate. That halving is the difference between a ₹11,999 decision and a ₹1,899 one, so it is worth ten careful minutes.
Part two — the volume bands, with what each one takes
Read down to your measured figure. Floor-area equivalents assume an ordinary 3m ceiling and are conversions rather than separate specifications — divide by your own height if yours differs. Coverage figures are manufacturer specifications and vary with ventilation, furnishing, intensity setting and season.
The threshold table
Connected volume, and what it honestly takes
| Connected volume | ≈ floor area at a 3m ceiling | Typical Indian property | What it takes | Price |
|---|---|---|---|---|
| Under ~25m³ | Under ~90 sq ft | Bathroom, entrance lobby, small study | One 50ml reed diffuser, six fibre reeds | ₹749–₹849 |
| ~25–45m³ | ~90–160 sq ft | A bedroom with the door usually shut | One 130ml reed, or a Boond at ~150 sq ft | ₹1,249–₹1,349 · or ₹899 |
| ~45–90m³ ★ | ~160–320 sq ft | A normal living room or living-dining in a flat | Sukoon — 270–320 sq ft, timers, remote | ₹1,899 |
| ~90–150m³ | ~320–540 sq ft | Open living-dining-kitchen in a newer 3BHK | Two Sukoons at opposite ends, or one plus reeds | ₹1,899 × 2 = ₹3,798 |
| ~150–250m³ | ~540–900 sq ft | Villa ground floor; large open-plan apartment | The grey band — three Sukoons or one Vaayu | ₹5,697 · or ₹11,999 |
| ~250–600m³ | ~900–2,150 sq ft | Large villa floor, farmhouse common area, duplex | One Vaayu, placed at the junction | ₹11,999 |
| ~600–1000m³ | ~2,150–3,585 sq ft | Whole-floor property, big double-height hall | One Vaayu at the top of its rating, HVAC-mounted | ₹11,999 |
| Above 1000m³ | Above ~3,585 sq ft | Hotel lobby, showroom, banquet floor | Commercial: Aangan ~8,000–10,000 sq ft, Meenar 12,000–18,000 | ₹25,999 · ₹38,500 |
| The honest caveat: the floor-area column is a conversion, not a second specification — it exists because most readers think in square feet, and it assumes a 3m ceiling throughout. Divide the volume by your own ceiling height for a truer figure: 1000m³ ÷ 3m ≈ 333m² ≈ 3,585 sq ft, but 1000m³ ÷ 4.5m ≈ 222m² ≈ 2,390 sq ft, which is why the Vaayu's published range is 2,000–3,000 sq ft rather than a single number. Note also that the 6L Megh at ₹3,499 appears nowhere in this table as a coverage answer: it covers around 215 sq ft, less than the ₹1,899 Sukoon. It buys about 100 hours of runtime a fill and some humidity, never reach. | ||||
Shop this guide
Three machines, three bands
The SOSA principle
Square feet is what a builder sells you. Cubic metres is what you are scenting.
The two agree only under a standard ceiling. Every double-height hall, mezzanine and open stairwell widens the gap — and the gap is paid for in capacity you assumed you had.
Part three — why the answer is a band and not a line
I would love to publish a single number. It would make this page shorter and our product pages easier to write. The reason I will not is that two properties with identical volume can want different machines, and the difference lies in three things the tape measure cannot see. The first is doors. A 200m³ ground floor that is one continuous space is a genuine cold-air case; the same 200m³ divided into a hall, a sitting room and a dining room with doors between them is three ordinary rooms, and three ordinary rooms are three Sukoons at ₹1,899 × 3 = ₹5,697 — cheaper, and each independently controllable. The volume figure is the same. The right purchase is not.
The second is labour, and it is the one that moves people up the band earlier than arithmetic alone would. Several small machines mean several tanks, several refill routines and several sets of settings; one machine means one. If you are running a home, that difference is mildly annoying. If you are turning over a property between guests, or managing a house you do not live in, it is the whole argument — and it is why a host at 180m³ may reasonably buy what a resident at 220m³ reasonably declines. The third is control: reeds cannot be switched on, ultrasonics can be timed within a day, and the Vaayu's 1h/4h/8h/24h scheduling with a key-lock is a different order of governance over when a building smells of something. If scheduling is what you actually want, the threshold drops.
And one factor pushes in the other direction for everybody, regardless of volume. SOSA does not currently sell a separate Vaayu refill oil. The machine arrives with four Hotel Collection fragrances at 100ml each — 400ml, specified at 90+ days per fill at a mid intensity setting — and that is the whole cold-air supply available from us at the time of writing. The water-based Hotel Collection at 15ml ₹299, 100ml ₹999 and 300ml ₹1,799 is a different product for ultrasonic tanks and is not a refill for it, despite the shared scent names. If you measure 300m³ and the machine is clearly right for your building, ask SOSA about current refill availability before you order. A correct machine with an open supply question is still a question worth asking out loud.
Two properties can measure the same and want different machines. The tape measures volume; it cannot measure doors, labour or intent.
— Sonal Sahani, SOSA
Part four — four real properties, measured and decided
Four shapes of home that arrive in our inbox constantly, with the sums written out. Dimensions are typical rather than yours; the point is the method, so run it on your own paces.
Worked examples
The arithmetic, then the verdict
| The property | Connected spaces | The sum | Volume | Verdict and price |
|---|---|---|---|---|
| 2BHK flat, doors shut ★ | Living-dining and passage only | (6 × 4 × 3) + (2 × 4 × 3) = 72 + 24 | 96m³ | One Sukoon ₹1,899, reeds in the bedrooms from ₹749 |
| 3BHK, open kitchen | Living, dining, kitchen, hall — one volume | (7 × 5 × 3) + (4 × 4 × 3) + (3 × 3 × 3) | 105 + 48 + 27 = 180m³ | Grey band — two Sukoons ₹3,798, or a Vaayu if scheduling matters |
| Villa ground floor | Hall, living, dining, family room, stair void | (10 × 7 × 3.2) + (5 × 5 × 3.2) + stair void ~40 | 224 + 80 + 40 = 344m³ | One Vaayu ₹11,999, placed at the junction |
| Double-height living room | One room, 40m² floor, 6m to the highest point | 40 × 6 = 240 — twice the 3m figure of 120 | 240m³ | Vaayu ₹11,999, mounted low and aimed into the seating |
| Farmhouse common floor | Great room, dining, veranda open to it | (12 × 9 × 3.5) + (6 × 5 × 3.5) | 378 + 105 = 483m³ | Vaayu ₹11,999 — comfortably inside the 1000m³ rating |
| Studio Airbnb | One room, kitchenette, bath behind a door | 5 × 4 × 3 = 60, minus the bath | ~60m³ | Boond ₹899 or Sukoon ₹1,899 — never the big machine |
| Showroom or lobby | Trading floor plus mezzanine, no internal doors | Anything above 1000m³ | 1000m³+ | Past the Vaayu — Aangan ₹25,999, Meenar ₹38,500 |
Honest notes for buyers: every figure in this article is arithmetic on stated dimensions and manufacturer specifications, shown as sums (7 × 5 × 3 = 105m³; 105 + 48 + 27 = 180m³; 1000 ÷ 3 ≈ 333m² ≈ 3,585 sq ft; 1000 ÷ 4.5 ≈ 222m² ≈ 2,390 sq ft; ₹1,899 × 2 = ₹3,798; ₹1,899 × 3 = ₹5,697), using 1m² ≈ 10.76 sq ft and 1m³ ≈ 35.3 cu ft. They are not measurements taken in any particular home, and real behaviour varies with ventilation rate, furnishing and soft absorption, air-conditioning type, intensity setting, temperature and season. The volume bands are SOSA's working guidance, not an industry standard. The 6L Megh at ₹3,499 covers around 215 sq ft — less than the ₹1,899 Sukoon — and is a runtime and humidity machine, never a coverage upgrade. SOSA does not currently sell a separate Vaayu refill oil; the 400ml in the box is today's whole supply and long-term availability should be confirmed with SOSA before purchase. The cold-air oil is not the water-based Hotel Collection and the two are not interchangeable. Warranty length, spare parts, installation service and bulk terms are not published figures we can quote — ask SOSA. No health, air-purification or odour-removal claim is made. Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
The machine most measured spaces land on
SOSA Sukoon · 500ml ultrasonic cool-mist diffuser ₹1,899
270–320 sq ft of specified coverage, which is roughly 75–90m³ at a 3m ceiling — and that band is where the great majority of measured Indian living rooms actually land. 16–18 hours a fill on low, a remote with steady, 2H and 4H timers, and three 15ml Hotel Collection fragrances in the box. Where a volume comes out between about 90 and 150m³, two of these at ₹1,899 × 2 = ₹3,798, placed at opposite ends rather than one in the middle, beat a single machine trying to cross the space — and they cost about a third of the cold-air option while giving you two independent schedules.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
The first time somebody asked me for the cut-off in square feet, I gave them one, and I was wrong within a week. They had a double-height living room, the number I had given assumed a standard slab, and the machine they bought on my figure was working perfectly while scenting a volume of air above their heads that I had not counted. That is when we started answering this question in cubic metres and refusing to answer it any other way.
What surprised me since is how often the measurement talks people out of a purchase rather than into one. A ground floor that feels enormous when you are cleaning it turns out to be 140 cubic metres, and 140 cubic metres is two ₹1,899 machines rather than one at ₹11,999. I would guess three quarters of the people who write to us about a large space and then measure it end up spending less than they had planned to.
So please pace it before you buy anything from us. Length, width, height, in metres, in every space that shares air, minus everything behind a shut door. If the number comes out over about two hundred and fifty and the space is genuinely open, the cold-air machine is an honest purchase and I will say so — and I will also tell you to ask us about refill supply first, because that answer is not yet where I want it to be. Everything is composed and handmade in small batches in Pune, and a part of every order funds a girl's classroom through Nanhi Kali.
Frequently asked questions
What size space is a cold-air diffuser worth buying for?
Roughly 150 to 250 cubic metres of connected air is the grey band; above about 250m³ it is clearly the right tool, and below about 150m³ it is clearly not. At a standard 3m ceiling that band is around 540 to 900 square feet of genuinely open, door-free space. Under it, a Sukoon at ₹1,899 or two at ₹3,798 does the job for a fraction of ₹11,999.
How do I measure my space in cubic metres?
Length in metres × width in metres × ceiling height in metres, for each space, then add only the spaces that share air with where the machine will stand. A 7m × 5m room at 3m is 7 × 5 × 3 = 105m³. Include the full height of any double-height void — that is where most estimates go wrong. Convert with 1m² ≈ 10.76 sq ft and 1m³ ≈ 35.3 cu ft if you prefer imperial.
Why is the Vaayu listed as 2,000–3,000 sq ft rather than one figure?
Because the real specification is up to 1000m³ and square footage depends on your ceiling. 1000m³ ÷ 3m ≈ 333m² ≈ 3,585 sq ft; 1000m³ ÷ 4.5m ≈ 222m² ≈ 2,390 sq ft. The published band is a conservative translation across the ceiling heights we see in Indian homes. Measure your own volume and compare against 1000m³ rather than against a square-footage figure.
Do closed rooms count toward the volume?
No. A closed door is a wall to fragrance and no coverage rating crosses it. Measure only what is genuinely open to the machine's position, and treat every closed room as its own small problem — a 50ml reed diffuser at ₹749–₹849 for 6–8 weeks, or a 130ml at ₹1,249–₹1,349 for 14–18 weeks. Subtracting closed rooms typically halves the figure people first estimate.
What if my space is bigger than 1000m³?
Then you are past this machine and into commercial equipment: the Aangan at ₹25,999 covers roughly 8,000–10,000 sq ft on an HVAC nebulising principle, and the Meenar at ₹38,500 covers 12,000–18,000 sq ft. Two Vaayus in one very large volume is possible but is usually the wrong shape of answer — a single unit sized to the space, or a ducted one, gives you one consistent smell rather than two overlapping ones.
The size threshold · 2026
Pace it, multiply by the ceiling, and let the number decide — most measured rooms come out under ₹1,899
Vaayu ₹11,999 covers up to 1000m³ — about 2,000–3,000 sq ft depending on ceiling height — with a 400ml tank specified at 90+ days a fill, 1h/4h/8h/24h timers, key-lock, under 38 dB and 5W. Sukoon ₹1,899 covers 270–320 sq ft, roughly 75–90m³ at a 3m ceiling. Boond ₹899 covers about 150 sq ft. Reed diffusers from ₹749 for the rooms behind closed doors. No separate Vaayu refill oil is sold today, so ask SOSA before you commit. Free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
See the Vaayu → Sukoon ₹1,899
Continue the read
More on sizing the decision
- Can the Vaayu scent a large open-plan home? — the same measuring method applied to open plans.
- Who doesn't need a SOSA Vaayu? and who should buy one? — the two halves of the buyer question.
- Fragrancing a villa with high ceilings — where the height multiplier does the most damage.
- Which SOSA system for your room size? — the full room-size-to-product map.
- Brand: the SOSA founder story.
Editorial standards & sources
About this guide: Written by Sonal Sahani, ISIPCA Versailles-trained founder and perfumer at SOSA Home & Body, on the volume threshold at which a cold-air nebuliser becomes a reasonable purchase. All volume figures are arithmetic on stated dimensions and on manufacturer coverage specifications, shown as sums, and use the conversions 1 square metre ≈ 10.76 square feet and 1 cubic metre ≈ 35.3 cubic feet; they are not measurements taken in any particular property. Behaviour in a real building varies with ventilation rate, air-conditioning type, furnishing and soft absorption, ceiling height, intensity setting, temperature and season, so the bands published here are SOSA's working guidance rather than an industry standard. Warranty length, spare-part availability, installation service and bulk terms are not stated because they are not figures we can verify — ask SOSA directly. No health, wellness, air-purification or odour-removal claim is made or implied.SOSA Vaayu specifications (verified from the live product page, August 2026): ₹11,999 (the product page displays a rounded ₹12,000). Waterless cold-air nebulisation — pressurised air atomises undiluted fragrance oil into a dry nano-mist; no water, no heat, residue-free. Coverage up to 1000m³, about 2,000–3,000 sq ft. 400ml refillable tank, 90+ days per fill at a mid intensity setting. Bluetooth app plus onboard buttons, 1h / 4h / 8h / 24h timers, adjustable mist intensity, auto-stop and key-lock. Under 38 dB. DC 12V / 1A, 5W. 165 × 80.5 × 215 mm, 0.9 kg, black or white. Freestanding or wall / HVAC mount. CE, RoHS and SGS certified. Ships with four SOSA Hotel Collection fragrances at 100ml each (400ml in total) in one of three combos chosen at checkout. SOSA does not currently sell a separate Vaayu refill oil; the 400ml supplied in the box is the fragrance available at the time of writing, and buyers who need long-term supply should confirm current refill availability with SOSA before purchasing. The cold-air oil supplied with the Vaayu is a different product from the water-based Hotel Collection sold for ultrasonic machines (15ml ₹299 · 100ml ₹999 · 300ml ₹1,799), which must not be used in a Vaayu despite sharing scent names. Other SOSA machines: Boond 300ml ₹899 (~150 sq ft) · Sukoon 500ml ₹1,899 (270–320 sq ft) · Megh 6L ₹3,499 (~215 sq ft — a runtime and humidity machine, not a coverage upgrade) · Aangan ₹25,999 (~8,000–10,000 sq ft) · Meenar ₹38,500 (12,000–18,000 sq ft) · Safar car diffuser ₹3,999. Reed diffusers 50ml ₹749–₹849 (6–8 weeks) · 130ml ₹1,249–₹1,349 (14–18 weeks) · duo sets ₹1,498–₹1,598 · oil-only refills 300ml ₹2,399 / 500ml ₹3,499. Runtime, consumption and coverage figures are manufacturer specifications and vary with intensity setting, run hours, ceiling height, ventilation and season; any per-month or per-day figure in this guide is arithmetic on those specifications, not a measurement. Electricity costs vary by state tariff. No claim is made that scenting affects ratings, reviews, bookings, occupancy, revenue, health, mood or air quality. Free shipping above ₹499. A portion of every order supports girl-child education through Nanhi Kali. Prices subject to change — see the live product pages.