★ SOSA Vaayu · the full range compared
Every number on a diffuser box measures something different, and buying the biggest number is how people end up with less coverage than they started with
★ ★ ★ ★ ★
★★★★★
"I bought the 6L machine assuming six litres meant a bigger room. It does not. The Sukoon I already owned covered more."
Learned the Megh lesson late
★★★★★
"Having all five products in one table with what each number actually means is the page I wanted two purchases ago."
Villa owner · comparison table
★★★★★
"Reeds upstairs, Sukoon in the study, Vaayu for the open ground floor. Three formats, three jobs, no overlap."
All three formats
★★★★★
"Nobody had told me the Vaayu oil and the Hotel Collection are different products. Glad I read it before pouring anything."
Vaayu ₹11,999
★★★★★
"Runtime and coverage are not the same number. That sentence saved me from a ₹3,499 mistake for my banquet hall anteroom."
Business owner · avoided the Megh
★★★★★
"Six reed bottles across the homestay, one machine downstairs. The article laid out exactly that split before I asked."
Homestay owner
★★★★★
"I bought the 6L machine assuming six litres meant a bigger room. It does not. The Sukoon I already owned covered more."
Learned the Megh lesson late
★★★★★
"Having all five products in one table with what each number actually means is the page I wanted two purchases ago."
Villa owner · comparison table
★★★★★
"Reeds upstairs, Sukoon in the study, Vaayu for the open ground floor. Three formats, three jobs, no overlap."
All three formats
★★★★★
"Nobody had told me the Vaayu oil and the Hotel Collection are different products. Glad I read it before pouring anything."
Vaayu ₹11,999
★★★★★
"Runtime and coverage are not the same number. That sentence saved me from a ₹3,499 mistake for my banquet hall anteroom."
Business owner · avoided the Megh
★★★★★
"Six reed bottles across the homestay, one machine downstairs. The article laid out exactly that split before I asked."
Homestay owner
✓ Reeds from ₹749 (one closed room) · Boond ₹899 (~150 sq ft) · Sukoon ₹1,899 (270–320 sq ft) ✓ Megh ₹3,499 covers about 215 sq ft — a runtime and humidity machine, never a coverage upgrade ✓ Vaayu ₹11,999 up to 1000m³ · 400ml in the box · no separate refill oil is sold at the time of writing
Founder Diaries · Large-Space Scenting · The Complete Comparison
The coverage ladder: reeds to about 250–300 sq ft of connected space · Boond ~150 sq ft · Sukoon 270–320 sq ft · Megh ~215 sq ft · Vaayu up to 1000m³.
The myth this page exists to kill: the 6L Megh at ₹3,499 is not a coverage upgrade. It covers about 215 sq ft — less than the ₹1,899 Sukoon's 270–320. It buys runtime and humidity, nothing else.
The two honest gaps: replacement reeds are not sold separately, and no separate Vaayu refill oil is sold today — the 400ml in the box is the whole cold-air supply.
Megh · 6L₹3,499 · ~215 sq ftA plate vibrates water into a cool mist and the fragrance rides on it, diluted, with a small fan to move it out. Two numbers matter and they are not the same one. Coverage is how much room the machine can hold: Boond about 150 sq ft, Sukoon 270–320, Megh about 215. Runtime is how long a fill lasts: Boond about 6 hours from 300ml, Sukoon 16–18 hours from 500ml, Megh about 100 hours from 6 litres. Notice that the machine with by far the longest runtime has the middling coverage figure — tank size and reach are unrelated, because a bigger reservoir does not make the mist travel further. All three take the water-based Hotel Collection at ₹299 / ₹999 / ₹1,799, and all three add moisture to the room, which is the format working as designed.
Fresh Brew · one closed roomfrom ₹849Shop → Sukoon · 270–320 sq ft₹1,899Shop → 
Vaayu · up to 1000m³₹11,999Shop →
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.
SOSA sells fragrance in three fundamentally different ways, and the prices run from ₹749 to ₹11,999 with three more machines scattered in between. The confusion in this range is not caused by the products; it is caused by the numbers on them, because each product's headline figure measures something different. A reed diffuser's number is duration. A Boond's and a Sukoon's is coverage. A Megh's is runtime — six litres and about 100 hours, from a machine that covers less ground than the Sukoon costing ₹1,600 less. A Vaayu's is volume, in cubic metres. Line them up wrongly and you will buy the biggest figure on the shelf and end up with a smaller room scented than before.
Quick answers — read this first
The three-way in one line each: a reed diffuser is a passive point source for one closed room. A Sukoon is a water-carried mist for one normal room, on demand. A Vaayu is undiluted oil under pressurised air, for a whole connected floor.The coverage ladder: reeds to about 250–300 sq ft of connected space · Boond ~150 sq ft · Sukoon 270–320 sq ft · Megh ~215 sq ft · Vaayu up to 1000m³.
The myth this page exists to kill: the 6L Megh at ₹3,499 is not a coverage upgrade. It covers about 215 sq ft — less than the ₹1,899 Sukoon's 270–320. It buys runtime and humidity, nothing else.
The two honest gaps: replacement reeds are not sold separately, and no separate Vaayu refill oil is sold today — the 400ml in the box is the whole cold-air supply.
The short answer
Short answer: buy a reed diffuser (from ₹749) for any single closed room, anywhere without a socket, and anywhere nobody will operate a machine. Buy the Sukoon (₹1,899) for one normal-to-large room you want scented on demand, up to 270–320 sq ft. Buy the Vaayu (₹11,999) only when the connected volume is genuinely large — above roughly 800 to 1,000 sq ft — or when you need a schedule and a lock in a property you are not standing in.
Where the other three sit: the Boond at ₹899 is a bedroom-scale ultrasonic at about 150 sq ft. The Megh at ₹3,499 is a 6L, ~100-hour runtime and humidity machine covering about 215 sq ft — buy it for the runtime, never for reach. Above the Vaayu sit the commercial machines, the Aangan at ₹25,999 for roughly 8,000–10,000 sq ft and the Meenar at ₹38,500 for 12,000–18,000 sq ft, which are ducted, commercial products and not a home purchase.
In this guide
One closed room, no socket
Reed diffusers · from ₹749
One normal room, on demand
Sukoon · 270–320 sq ft · ₹1,899
A whole connected floor
Vaayu · up to 1000m³ · ₹11,999
Straight answer
Reed diffuser, Sukoon or Vaayu — what is the actual difference?
1. They differ by how fragrance leaves the product, and everything else follows from that. A reed diffuser has no propulsion at all — oil climbs six fibre reeds and evaporates, and the room's own air movement carries it or fails to. A Sukoon vibrates water into a cool mist with the fragrance diluted into it and a small fan behind it. A Vaayu uses no water: pressurised air atomises the oil neat into a dry nano-mist under its own pressure. Passive, water-carried, and undiluted-with-propulsion. Three categories, not three price points.
2. Read each headline number for what it is. "130ml, 14–18 weeks" is duration. "270–320 sq ft" is coverage. "6 litres, ~100 hours" is runtime. "1000m³" is volume. Only the coverage and volume numbers tell you how much room gets scented, and mixing them up is how the 6L machine gets bought as a big-room solution.
3. The Megh is the trap, and I would rather say so on our own page. The Megh is ₹3,499 for a 6-litre tank and about 100 hours of runtime, and it covers roughly 215 sq ft. The ₹1,899 Sukoon covers 270–320. You would be paying ₹1,600 more for about a third less ground (arithmetic on the published figures) and getting long unattended runtime and added humidity in exchange. That is a real thing to want. It is not more room.
4. Buy by the room's doors, not by the flat's size. A closed door is a wall to fragrance. A 1,400 sq ft flat with five closed doors is five separate problems, and five reed diffusers at ₹749–₹849 solve them for well under ₹4,500. A 1,000 sq ft open ground floor is one problem, and only the Vaayu solves it.
5. Check the consumable before the machine. Reed oil refills are stocked at ₹2,399 for 300ml and ₹3,499 for 500ml, though replacement reeds are not sold separately. The water-based Hotel Collection for ultrasonic machines is stocked at ₹299, ₹999 and ₹1,799. SOSA does not currently sell a separate Vaayu refill oil: the 400ml supplied in the box is the cold-air supply available today, and the Hotel Collection is a different product that must not go in a Vaayu despite sharing scent names. Reed oil goes in no machine at all.
6. None of the three cleans anything. No purification, no odour removal, no effect on health or mood. Ventilate first, then scent.
Reeds are composed and handmade in small batches in Pune, the machines are made in India, free shipping applies above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
2. Read each headline number for what it is. "130ml, 14–18 weeks" is duration. "270–320 sq ft" is coverage. "6 litres, ~100 hours" is runtime. "1000m³" is volume. Only the coverage and volume numbers tell you how much room gets scented, and mixing them up is how the 6L machine gets bought as a big-room solution.
3. The Megh is the trap, and I would rather say so on our own page. The Megh is ₹3,499 for a 6-litre tank and about 100 hours of runtime, and it covers roughly 215 sq ft. The ₹1,899 Sukoon covers 270–320. You would be paying ₹1,600 more for about a third less ground (arithmetic on the published figures) and getting long unattended runtime and added humidity in exchange. That is a real thing to want. It is not more room.
4. Buy by the room's doors, not by the flat's size. A closed door is a wall to fragrance. A 1,400 sq ft flat with five closed doors is five separate problems, and five reed diffusers at ₹749–₹849 solve them for well under ₹4,500. A 1,000 sq ft open ground floor is one problem, and only the Vaayu solves it.
5. Check the consumable before the machine. Reed oil refills are stocked at ₹2,399 for 300ml and ₹3,499 for 500ml, though replacement reeds are not sold separately. The water-based Hotel Collection for ultrasonic machines is stocked at ₹299, ₹999 and ₹1,799. SOSA does not currently sell a separate Vaayu refill oil: the 400ml supplied in the box is the cold-air supply available today, and the Hotel Collection is a different product that must not go in a Vaayu despite sharing scent names. Reed oil goes in no machine at all.
6. None of the three cleans anything. No purification, no odour removal, no effect on health or mood. Ventilate first, then scent.
Reeds are composed and handmade in small batches in Pune, the machines are made in India, free shipping applies above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
TL;DR: reed diffuser for one closed room from ₹749; Sukoon for one normal room on demand at ₹1,899 covering 270–320 sq ft; Vaayu at ₹11,999 for a connected volume up to 1000m³. Boond ₹899 is the small ultrasonic. Megh ₹3,499 is runtime and humidity at about 215 sq ft, never a coverage upgrade. Aangan and Meenar are commercial. Reed refills and Hotel Collection are stocked; a separate Vaayu refill is not.
The middle rung, and the one most homes land on
SOSA Sukoon · 500ml ultrasonic ₹1,899
270–320 sq ft of coverage — more ground than the 6-litre Megh at ₹3,499, which is the fact that surprises people most in this range. The 500ml tank runs 16 to 18 hours on low, and the remote gives steady, 2H and 4H modes so a room can be scented before people arrive rather than during. Three 15ml Hotel Collection fragrances in the box, restocking at ₹299 for 15ml, ₹999 for 100ml or ₹1,799 for 300ml — a consumable you can reorder for as long as you own it.
Part one — three formats, three completely different numbers
If you take nothing else from this comparison, take this: the three products answer three different questions, and none of them is "how strong is it". A reed diffuser answers "how long will this last". An ultrasonic answers "how much room, and for how many hours per fill". A cold-air nebuliser answers "how much air, in cubic metres". Reading one product's number against another's is the mechanism by which almost every wrong purchase in this category happens, and the three cards below are the correction.
1
FORMAT ONE · PASSIVE
The reed diffuser — duration, and a hard low ceiling
Six fibre reeds, no electricity, no switch, no schedule. Oil wicks up and evaporates, and the room distributes it or does not — which is why placement in gentle passing air matters more than anything you can buy. A 50ml at ₹749–₹849 lasts 6–8 weeks and a 130ml at ₹1,249–₹1,349 lasts 14–18 weeks; the larger bottle buys duration, never a louder room, because at the same six reeds it projects the same. Strength lives in the composition — Fresh Brew at 9.5 and Mountain Breeze at 9.4 against Evening Calm at 8.9, all positions on SOSA's own internal scale at six reeds rather than an industry standard — and in reed count, which raises output and shortens the bottle roughly in proportion. The honest ceiling is around 250–300 sq ft of connected space, and no combination of reeds or bottles exceeds it, because the format has no propulsion.
The number to read: weeks, not square feet. Buy a bigger bottle for fewer reorders, not for a bigger room.
2
FORMAT TWO · WATER-CARRIED
The ultrasonic — coverage and runtime, which are separate figures
Megh · 6L₹3,499 · ~215 sq ftA plate vibrates water into a cool mist and the fragrance rides on it, diluted, with a small fan to move it out. Two numbers matter and they are not the same one. Coverage is how much room the machine can hold: Boond about 150 sq ft, Sukoon 270–320, Megh about 215. Runtime is how long a fill lasts: Boond about 6 hours from 300ml, Sukoon 16–18 hours from 500ml, Megh about 100 hours from 6 litres. Notice that the machine with by far the longest runtime has the middling coverage figure — tank size and reach are unrelated, because a bigger reservoir does not make the mist travel further. All three take the water-based Hotel Collection at ₹299 / ₹999 / ₹1,799, and all three add moisture to the room, which is the format working as designed.
The number to read: square feet for reach, hours for how often you refill. Litres tell you neither on their own.
3
FORMAT THREE · UNDILUTED COLD-AIR
The Vaayu — volume, in cubic metres, with its own propulsion
No water and no heat. Pressurised air atomises undiluted oil into a dry nano-mist fine enough to stay suspended, and pushes it out under pressure so the room's currents carry it. That is the reason the specification jumps by an order of magnitude rather than a notch: up to 1000m³, which the product page translates as about 2,000 to 3,000 sq ft — a range rather than a figure, because the rating is cubic and your ceiling height decides which end applies. A 400ml tank runs 90+ days per fill, roughly 4.4ml a day (arithmetic: 400 ÷ 90). Control is the second argument and for some buyers the first: Bluetooth app plus onboard buttons, 1h / 4h / 8h / 24h timers, adjustable intensity, auto-stop and a key-lock, under 38 dB on 5W, freestanding or wall and HVAC mounted at 0.9 kg, CE / RoHS / SGS certified. The honest gap: no separate Vaayu refill oil is sold at the time of writing. Four 100ml cold-air fragrances come in the box and that is the supply available today; ask SOSA before buying if long-term supply matters.
Part two — the whole range in one table
Every SOSA fragrance product that scents a room, with the four figures that actually decide a purchase, and the consumable question stated for each. The commercial pair sit at the bottom for scale rather than as a home recommendation.
Reed diffuser · Boond · Sukoon · Megh · Vaayu · Aangan
Mechanism, reach, life per fill, and whether you can buy more fragrance
| Product and price | How fragrance leaves it | Honest reach | Life per fill or bottle | Can you restock the fragrance? |
|---|---|---|---|---|
| Sukoon · ₹1,899 ★ | Ultrasonic mist, water-carried, small fan | 270–320 sq ft — the most ground per rupee in the range | 16–18 hrs on low from 500ml | Yes — Hotel Collection ₹299 / ₹999 / ₹1,799 |
| Reed diffuser 50ml · ₹749–₹849 | Passive wicking up six fibre reeds, no propulsion | One closed room, to about 250–300 sq ft connected | 6–8 weeks | Yes — oil refill 300ml ₹2,399, but reeds are not sold separately |
| Reed diffuser 130ml · ₹1,249–₹1,349 | The same — larger bottle, identical projection at six reeds | Same as the 50ml; size buys weeks, not reach | 14–18 weeks | Yes — 500ml refill ₹3,499 runs roughly 14–18 months |
| Boond · ₹899 | Ultrasonic mist, USB powered, colour night light | About 150 sq ft — a bedroom or study | About 6 hrs from 300ml | Yes — Hotel Collection, same as the Sukoon |
| Megh · ₹3,499 | Ultrasonic mist from a 6-litre reservoir | About 215 sq ft — less than the ₹1,899 Sukoon | About 100 hrs — the longest in the range | Yes — Hotel Collection |
| Vaayu · ₹11,999 | Undiluted oil atomised by pressurised air, dry, no water | Up to 1000m³ — about 2,000–3,000 sq ft | 90+ days from 400ml | No separate refill oil is sold today — ask SOSA |
| Aangan · ₹25,999 · Meenar · ₹38,500 | HVAC-mounted commercial nebulising, ducted | 8,000–10,000 and 12,000–18,000 sq ft | Commercial specification | Commercial supply — not a home purchase; ask SOSA |
| The honest caveat: read the third column before any other, and read it against your own doors. Reach figures assume connected space, so a flat with five closed doors does not get to add its rooms together — and equally, a villa with no internal doors does not get to subtract them. Two rows deserve a second look. The Megh's reach is genuinely lower than the Sukoon's despite costing ₹1,600 more; buy it for 100 hours of unattended runtime, or do not buy it. And the Vaayu's last column is the only "no" in the table, which at ₹11,999 is a thing to weigh rather than skim. | ||||
Shop this guide
One product from each of the three categories
Fresh Brew · one closed roomfrom ₹849Shop → Sukoon · 270–320 sq ft₹1,899Shop → Vaayu · up to 1000m³₹11,999Shop →
The SOSA principle
Litres are runtime. Millilitres are duration. Only propulsion is reach.
Six litres in a tank is six litres of water waiting its turn. It does not travel further than half a litre does, and the price difference between those two machines buys you time, not territory.
Part three — the Megh myth, and where the Boond and Aangan sit
I want to spend a proper section on the Megh, because it is the most misunderstood product we sell and the misunderstanding is entirely intuitive. Six litres sounds enormous. It is enormous — against a 300ml Boond it is twenty times the reservoir, and against the Sukoon's 500ml it is twelve times. The mistake is assuming any of that translates into distance. It does not, because the size of a tank has no relationship whatsoever to how far a mist travels. Reach in an ultrasonic is decided by how much fragrance the mist can carry, which is capped by dilution in water, and by how hard the little fan can push it. The Megh's published coverage is about 215 sq ft. The Sukoon's is 270–320. So a buyer moving from a ₹1,899 Sukoon to a ₹3,499 Megh in search of a bigger room is paying ₹1,600 more — 84% more, arithmetic on the two prices — for roughly a third less ground.
Which is not to say the Megh is a bad product; it is a specific one. What six litres buys is about 100 hours of runtime, against 16 to 18 hours on the Sukoon. That is the difference between a machine you fill most days and one you fill once a week and forget, and for a yoga studio, a clinic waiting room, a shop floor or a home where nobody wants a daily task, that is genuinely valuable. It is also a humidity machine by consequence — six litres of water has to go somewhere, and in a dry Delhi or Jaipur winter some people want exactly that. So the Megh's honest sentence is: buy it for unattended runtime, or for the humidity, and never for the room size. If reach is the problem, the answer is a Sukoon at ₹1,899, or two of them, or a change of category altogether.
The other two products in the range are easier to place. The Boond at ₹899 is the small ultrasonic — 300ml, about six hours a fill, USB powered with a colour night light, and about 150 sq ft of coverage. That is a bedroom, a study or a nursery, and for those rooms it is the right machine rather than a cheap version of a better one; buying a Sukoon for a 120 sq ft bedroom is the same error as buying a Vaayu for a living room, one rung down. At the top, the Aangan at ₹25,999 covers roughly 8,000 to 10,000 sq ft and the Meenar at ₹38,500 covers 12,000 to 18,000, both HVAC-mounted commercial nebulisers for hotels, showrooms and corporate floors. I mention them only for scale, and to make the point that the Vaayu is not the top of a domestic ladder that keeps climbing — it is the largest sensible home machine, and the two above it belong to buildings with duct runs and a maintenance contract. If you are scenting a lobby rather than a living room, that is a conversation to have with SOSA directly rather than a purchase to make from a blog page.
A bigger tank is a longer nap between refills. It is not a bigger room.
— Sonal Sahani, SOSA
Part four — six beliefs worth correcting before you spend
Every one of these arrives in my inbox weekly, and every one of them has cost somebody money.
The corrections
What people believe, and the verified position
| The belief | Why it is believed | The verified position | What to do instead |
|---|---|---|---|
| "The 6L Megh must cover the biggest room" ★ | Six litres is by far the biggest number in the range | ~215 sq ft — less than the ₹1,899 Sukoon's 270–320 | Buy the Megh for ~100 hrs of runtime; buy reach elsewhere |
| "A 130ml reed diffuser is stronger than a 50ml" | More oil ought to mean more fragrance | 14–18 weeks against 6–8; identical projection at six reeds | Buy 130ml for fewer reorders; change composition for presence |
| "The Hotel Collection is the Vaayu's refill" | It shares scent names and is sold alongside it | It is water-based, for ultrasonics. It does not go in a Vaayu | Ask SOSA about cold-air supply; do not substitute |
| "Reed oil can top up a machine" | It is the same brand and smells the same | Reed oil belongs in no machine, ultrasonic or cold-air | Use reed refills in reed bottles only |
| "One machine will scent the whole flat" | The flat's total square footage is on the sale deed | A closed door is a wall; only connected space counts | One source per closed room — reeds from ₹749 |
| "The Aangan is just a bigger Vaayu for a big house" | It is the next machine up the list | ₹25,999, 8,000–10,000 sq ft, HVAC-mounted and commercial | For a home, the Vaayu is the top of the sensible ladder |
Honest notes for buyers: coverage, runtime and tank figures are manufacturer specifications from the live SOSA product pages as at August 2026, and every ratio or percentage on this page is arithmetic on those published figures rather than a measurement; real behaviour varies with connected volume, ceiling height, furnishing, ventilation, intensity setting and season. Reed strength ratings are positions on SOSA's own internal scale at six reeds, not an industry standard, and the reed range has no oud, no musk-forward scent and no aquatic. Reed refills are oil only — replacement reeds are not sold separately, and SOSA guidance is to refresh them every few months. SOSA does not currently sell a separate Vaayu refill oil; the four 100ml cold-air fragrances in the box, 400ml in total, are the supply available at the time of writing, and buyers who need long-term supply should confirm the position with SOSA before purchasing. The water-based Hotel Collection is for ultrasonic machines only. Warranty, service, spares, installation and app platform details are not stated here — ask SOSA. No health, wellness, mood, air-purification or odour-removal claim is made or implied. Free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
Buy it for the hundred hours, not for the room
SOSA Megh · 6L ultrasonic ₹3,499
Six litres and about 100 hours of runtime, which is the longest unattended stretch anything in the range offers — fill it once and leave it for the best part of a week. Its coverage is about 215 sq ft, which is less than the ₹1,899 Sukoon's 270–320, so it is never the answer to a room that feels too big. It takes the same water-based Hotel Collection fragrances at ₹299, ₹999 and ₹1,799, and like every ultrasonic it adds moisture to the room — which is a drawback on a humid coast and something people actively want in a dry northern winter.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
A range this wide is a liability as much as an asset. When there are six ways to scent a room and they run from ₹749 to ₹38,500, a customer's most likely mistake is not buying the wrong brand — it is buying the wrong rung from the right brand, which is worse, because we took the money and they still have the problem.
The Megh is the one that keeps me awake. It is an excellent machine doing an unusual job, and its headline number is the biggest in the catalogue, so people reach for it when a room feels too large. Six litres of water is six litres of water; it does not travel one inch further than half a litre does. We say ~215 sq ft on the product page and I will keep saying it in every article where the machine appears, because I would rather lose the sale than take ₹3,499 for a coverage upgrade that is not one.
The same instinct is why I keep repeating the Vaayu's refill gap. It is a fine machine and I stand behind it entirely, and we do not sell a separate cold-air refill yet — the 400ml in the box is what exists. It sits next to the other gap I have been stating on reed pages for two years, which is that we do not sell replacement reeds either. Naming both keeps me honest and, I hope, saves someone a purchase they would have resented. Everything is made in India, and a part of every order funds a girl's classroom through Nanhi Kali.
Frequently asked questions
Is the 6L Megh better than the Sukoon for a large room?
What is the actual difference between the Sukoon and the Vaayu?
Water. The Sukoon carries diluted fragrance on a water mist with a small fan; the Vaayu atomises undiluted oil with pressurised air and no water at all. That difference is why one is rated at 270–320 sq ft and the other at up to 1000m³, and why the Vaayu adds no moisture to a room. The prices are ₹1,899 and ₹11,999 — a ratio of 6.3, arithmetic on list prices.
Can I use the same fragrance in all three?
No — three products, three oils. Reed diffuser oil wicks up fibre reeds and goes in no machine. The water-based Hotel Collection at ₹299 / ₹999 / ₹1,799 is for ultrasonic machines only. The 400ml supplied with the Vaayu is a cold-air oil for undiluted nebulisation, and no separate refill of it is sold at the time of writing.
If I can only buy one thing, what should it be?
For most homes, the Sukoon at ₹1,899 — it covers the largest room most people actually have, runs 16–18 hours a fill, can be timed, and comes with three fragrances. If the room in question is small or has no free socket, buy a reed diffuser from ₹749 instead and spend the difference on a second one.
Where do the Aangan and Meenar fit?
Above the Vaayu and outside the home entirely. The Aangan at ₹25,999 covers roughly 8,000–10,000 sq ft and the Meenar at ₹38,500 covers 12,000–18,000, both HVAC-mounted commercial machines for hotels, showrooms and corporate floors. For a house, the Vaayu is the top of the sensible ladder.
The complete SOSA comparison · 2026
Read the right number on the box — litres are runtime, millilitres are weeks, and only propulsion is reach
Reed diffusers ₹749–₹849 for 50ml (6–8 weeks) and ₹1,249–₹1,349 for 130ml (14–18 weeks), six fibre reeds, oil-only refills from ₹2,399. Boond ₹899, about 150 sq ft. Sukoon ₹1,899, 270–320 sq ft, 16–18 hours on low, three 15ml scents included. Megh ₹3,499, about 215 sq ft and roughly 100 hours — runtime and humidity, never coverage. Vaayu ₹11,999, waterless cold-air up to 1000m³ (about 2,000–3,000 sq ft), 400ml tank at 90+ days a fill, timers, intensity and key-lock, with no separate refill oil on sale today. Free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
Shop the Sukoon ₹1,899 → Vaayu ₹11,999
Continue the read
More on comparing SOSA diffusers
- Sukoon vs Vaayu and reed diffuser vs Vaayu — the two head-to-heads in full.
- Nebulising vs ultrasonic for large homes — what the word "nebulising" actually means on a spec sheet.
- Scent machine vs reed diffusers for a villa — the same choice costed in labour rather than rupees.
- Which SOSA system is right for your room size? — the complete room-size 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, as a complete comparison of SOSA's reed diffusers, ultrasonic machines and cold-air Vaayu. Every price, coverage, runtime and tank figure is taken from the live SOSA product pages as at August 2026; percentages and ratios shown are arithmetic on those published figures and are labelled as such rather than presented as measurements. Coverage varies with connected volume, ceiling height, furnishing, ventilation, intensity setting and season. Reed strength ratings are positions on SOSA's own internal scale at six reeds and are not an industry standard. No health, wellness, mood, air-purification or odour-removal claim is made or implied — a diffuser adds fragrance and does nothing else.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.