★ SOSA on One Machine Versus Many
One machine wins on connected air. Several small ones win on doors that stay shut
★ ★ ★ ★ ★
★★★★★
"Six small diffusers were costing more over a year than one machine and I still had six things to refill. The maths made the decision, not the marketing."
SOSA Vaayu · instead of six units
★★★★★
"The difference is not that it is stronger. It is that the smell is the same in the hall as it is in the passage. That is what I was actually chasing."
SOSA Vaayu · even coverage
★★★★★
"Five bottles on five surfaces, all slightly different ages, none of them enough. Replacing them with one small unit tidied the house as much as it scented it."
SOSA Vaayu · instead of scattered bottles
★★★★★
"Ground floor open plan plus the stairwell. One unit near the return, doors open, and the whole level holds it. I had budgeted for three."
SOSA Vaayu · villa ground floor
★★★★★
"We kept the reeds. They are in both bathrooms and on the bedside, which is where they were always good. The machine holds the rest of the floor."
Morning Freshness reed · bathrooms
★★★★★
"A tank lasts us about two and a half months on a moderate setting with a ten-hour schedule. That was the number I wanted before buying and they gave it straight."
SOSA Vaayu · 400ml tank
★★★★★
"Six small diffusers were costing more over a year than one machine and I still had six things to refill. The maths made the decision, not the marketing."
SOSA Vaayu · instead of six units
★★★★★
"The difference is not that it is stronger. It is that the smell is the same in the hall as it is in the passage. That is what I was actually chasing."
SOSA Vaayu · even coverage
★★★★★
"Five bottles on five surfaces, all slightly different ages, none of them enough. Replacing them with one small unit tidied the house as much as it scented it."
SOSA Vaayu · instead of scattered bottles
★★★★★
"Ground floor open plan plus the stairwell. One unit near the return, doors open, and the whole level holds it. I had budgeted for three."
SOSA Vaayu · villa ground floor
★★★★★
"We kept the reeds. They are in both bathrooms and on the bedside, which is where they were always good. The machine holds the rest of the floor."
Morning Freshness reed · bathrooms
★★★★★
"A tank lasts us about two and a half months on a moderate setting with a ten-hour schedule. That was the number I wanted before buying and they gave it straight."
SOSA Vaayu · 400ml tank
★ What we would actually put in a large home
SOSA VaayuOne machine, a whole floor, on a scheduleView ₹11,999
SOSA VaayuWaterless, under 38dB, 400ml tankView ₹11,999
Morning Freshness reedStill the right answer in a small roomView ₹749
✓ One Vaayu covers up to 1000m³ - about 2,000-3,000 sq ft - which is a whole floor, not a room ✓ And if your space is small, we will tell you to buy the ₹749 reed instead ✓ Made in India · independent, not affiliated with any hotel · a portion funds girl-child education
Founder Diaries · Home Problems · When Home Fragrance Is Not Enough
Is one big diffuser cheaper than five small ones? In a large home over two or three years, usually yes. Five or six reeds at ₹749 is roughly ₹4,500 every time the bottles run dry and you repeat it indefinitely. A SOSA Vaayu is ₹11,999 once, holds 400ml for up to about 75 days, and uses 5W - roughly 1.5 units of electricity a month on a ten-hour daily schedule. In a small home the arithmetic reverses completely and reeds are the cheaper and better answer.
Should I put a small diffuser in every room instead of one machine? Only for the rooms whose doors stay shut. Air carries fragrance, so a machine on the main floor cannot reach a closed bedroom, a bathroom or a separate level, and those rooms need their own source - a reed at ₹749, or a small ultrasonic unit such as the SOSA Sukoon (₹1,899) if you want a machine in one dry room. Rooms whose doors stay open should not have their own unit; they are part of the same body of air and one correctly sized machine holds them all.
See the SOSA Vaayu Book a scenting plan
Facts verified 24 August 2026 against the live SOSA product pages: The SOSA Vaayu (₹11,999) is a waterless cold-air nebuliser rated to 1000m³, described by the manufacturer as approximately 2,000-3,000 sq ft, with a 400ml refillable tank lasting up to about 75 days depending on intensity and run hours, Bluetooth app and onboard button control, 1h/4h/8h/24h timers with adjustable intensity, operation under 38dB, DC 12V/1A at 5W, dimensions 165 x 80.5 x 215mm at 0.9kg, freestanding or wall and HVAC mounting, auto-stop and key-lock, and CE, RoHS and SGS certification. It uses no water and no heat, so it adds no dampness and leaves no residue. The SOSA Morning Freshness reed diffuser (₹749) is a passive reed diffuser: oil rises through the reeds by capillary action and evaporates from the exposed reed and the bottle neck, with no power, no flame, no noise and no schedule. Its output is set by the reeds, the oil and the room rather than by a control, which is what makes it right for a small room and unable to hold a large open volume. The SOSA Sukoon (₹1,899) is a 500ml ultrasonic cool-mist diffuser with a timer, sized for a single room. It is a different system from the Vaayu: it mists water plus a water-based fragrance made for ultrasonic diffusers, from ₹299, and because it mists water it adds a little humidity to the room it is in. The two machines do not share fragrance. Scent enhances the ambience and perceived quality of a space; it works alongside proper ventilation and cleaning and is not a substitute for either, and SOSA makes no claim that fragrance alone influences a purchase decision. The hotel-inspired scents are SOSA's own original interpretations; SOSA is an independent brand and is not affiliated with, or endorsed by, any hotel named for reference. Coverage, fragrance usage and running cost depend on the space, settings and hours of use, and are confirmed on a consultation. Prices and availability are subject to change - see the live product pages.
This is the decision most people in a large home are actually making: one machine, or another two or three small units to go with the ones already on the shelves. It deserves a straight answer rather than a sales pitch, so here is the comparison on the four axes that differ, and the four situations where the small units are genuinely the better purchase and we would tell you to buy them instead.
Quick answers — read this first
Is the SOSA Vaayu better than several small diffusers for a large home? For a large connected space, yes. The Vaayu (₹11,999) is rated to 1000m³, about 2,000-3,000 sq ft, and releases continuously into moving air, so one unit on the air path holds a whole floor at one level. Several small diffusers each scent a radius around themselves, which produces pockets with unscented space in between, plus several bottles at different ages and several refills to remember. Where the small units win is on doors: scent cannot travel into a closed room, so a shut guest room, a bathroom or a separate floor genuinely needs its own source.Is one big diffuser cheaper than five small ones? In a large home over two or three years, usually yes. Five or six reeds at ₹749 is roughly ₹4,500 every time the bottles run dry and you repeat it indefinitely. A SOSA Vaayu is ₹11,999 once, holds 400ml for up to about 75 days, and uses 5W - roughly 1.5 units of electricity a month on a ten-hour daily schedule. In a small home the arithmetic reverses completely and reeds are the cheaper and better answer.
Should I put a small diffuser in every room instead of one machine? Only for the rooms whose doors stay shut. Air carries fragrance, so a machine on the main floor cannot reach a closed bedroom, a bathroom or a separate level, and those rooms need their own source - a reed at ₹749, or a small ultrasonic unit such as the SOSA Sukoon (₹1,899) if you want a machine in one dry room. Rooms whose doors stay open should not have their own unit; they are part of the same body of air and one correctly sized machine holds them all.
The short answer
Short answer: for a large connected space, yes. One SOSA Vaayu (₹11,999) rated to 1000m³ releases continuously into moving air and holds a whole floor at one level, while several small units each scent a radius and leave unscented gaps, with several bottles and refill dates to manage. Where several small units genuinely win is on closed doors: scent cannot reach a room the air cannot reach, so shut rooms need their own source.
The pick: one SOSA Vaayu (₹11,999) for the connected floor, plus a reed (₹749) in each room that stays shut - or a SOSA Sukoon (₹1,899) if you want a small machine in one dry room you open regularly.
Next step: send us a rough floor plan marked with the doors you keep shut, and we will tell you the honest count - ask us what fits your home.
In this guide
The comparison is decided by whether the air connects. Where it does, one correctly sized machine beats several small units on every axis that matters. Where it does not - a shut guest room, a bathroom, a separate floor - a small unit in that room is not a compromise, it is the only thing that can work.
The two formats worth owning - tap either
One machine for the floor
SOSA Vaayu · ₹11,999
Why the scatter approach fails
Pockets instead of coverage
Send us the floor plan
Free home scenting advice
Straight answer
One SOSA Vaayu or five small diffusers - which is actually better for a large home?
It comes down to whether the air connects. Coverage. A SOSA Vaayu is rated to 1000m³ - about 2,000-3,000 sq ft - and releases continuously into moving air, so one unit placed on the air path holds an entire connected floor. Small units are not rated in volume for a reason: each one perfumes a radius around itself. Five of them in one open floor give you five radiuses, not one scented home. Evenness. This is the difference people describe after switching, more often than strength. Walking through a house held by one source is a single continuous impression; walking through five is a sequence of arrivals and departures, made worse by the fact that the five bottles are at different ages and therefore different strengths. Upkeep and cost. One 400ml tank lasting up to about 75 days and 5W of power - roughly 1.5 units of electricity a month on a ten-hour daily schedule - against five bottles to buy, refill, dust and remember. Six reeds at ₹749 is about ₹4,500 each time they run dry, repeated indefinitely, so over two or three years in a large home the single machine usually costs less as well as working better. Moisture. If the small units you are considering are ultrasonic mist diffusers such as the SOSA Sukoon (₹1,899), there is a technical difference worth knowing: they mist water plus a water-based fragrance, so they add humidity to the room. That is pleasant in a dry Delhi winter and wrong in a Mumbai monsoon or any room that already smells musty. The Vaayu is waterless and nebulises pure oil, so it adds no moisture at all and leaves no residue on wood, books or textiles. The two are different systems and they do not share fragrance. Now the honest other side. Where several small units win. Closed doors, first and foremost: fragrance travels with air, so a shut guest room, a bathroom or a separate floor cannot be reached by any machine elsewhere in the house, however large. Different fragrances in different zones, if that is what you want - one machine means one scent at a time. A staggered budget, since ₹749 or ₹1,899 at a time is easier than ₹11,999 in one go. And a rented flat where the socket is not where the fragrance needs to be. In all four cases, buy the small units. One check before you spend anything, because it is the most common reason an upgrade disappoints. Fragrance does not remove odour molecules. It adds fragrance on top of them. If what you are actually fighting is damp, a bin, a dried-out drain trap, a shoe cabinet, a fridge or a pet bed, then a bigger fragrance machine simply gives you a bigger version of both smells at once. No diffuser of any kind is an air purifier: it does not disinfect, dehumidify, remove off-gassing or make any health claim. Find the source, deal with it, open the windows and move some air through the house - and scent a home that is already clean. And a limit at the other end, so nobody buys the wrong thing in the other direction. One machine rated to 1000m³ genuinely covers most Indian homes, including large 3BHK and 4BHK flats and most villas, when the internal doors are open and it sits on the main air path. If your home is genuinely 8,000-10,000 sq ft, spread over three floors, or built around a double-height volume, one machine of this size is not the honest answer either, and we would rather size it with you than sell you something that will underperform. A portion of every order supports girl-child education through Nanhi Kali.
For connected air, one machine wins on coverage, evenness, upkeep and usually cost. For closed rooms, separate floors, different scents per zone or a staggered budget, several small units are genuinely the better buy.
For the connected part of a large home, one machine replaces the collection. The SOSA Vaayu at ₹11,999 is rated to 1000m³ - about 2,000-3,000 sq ft - waterless, under 38dB, 400ml tank up to about 75 days, 1h/4h/8h/24h timers. Rooms that stay shut still want a ₹749 reed, and one dry room you open daily can take a ₹1,899 Sukoon.
See the SOSA Vaayu ₹11,999 Ask what fits your home
Where one machine wins
Connected air: coverage, evenness, upkeep and usually cost
One machine, or several small ones
Three products, and the floor plan decides which combination you need. In most large homes it is one machine plus one or two reeds, and in a small home it is reeds alone.
The connected floor of a large home
SOSA Vaayu
Waterless cold-air nebuliser rated to 1000m³ - about 2,000-3,000 sq ft. One position on the air path holds the whole connected volume at one level, on a 1h/4h/8h/24h schedule with adjustable intensity. 400ml tank up to about 75 days, under 38dB, 5W, auto-stop and key-lock.
From ₹11,999
Every room whose door stays shut
SOSA Morning Freshness reed
Scent cannot travel through a closed door, so a shut guest room, a bathroom or a study needs its own source. A passive reed is the cheapest correct answer: no power point, no noise, nothing to switch on, and weeks of quiet output.
₹749
One dry room you open every day
SOSA Sukoon
A 500ml ultrasonic cool-mist diffuser with a timer, for a single room. It is a different system from the Vaayu: it mists water plus a water-based fragrance, so it adds a little humidity - welcome in a dry winter, wrong in a monsoon or a room that already smells musty.
₹1,899 · fragrance from ₹299
One machine against five: coverage, cost and upkeep
Three axes where the two approaches genuinely differ, and a fourth that most comparisons leave out entirely.
1
Coverage and evenness
A radius each, or one level across the volume
A small diffuser releases into the air immediately around itself, so the fragrance is strong at the unit and thin two or three metres away. Put five in an open floor and you have five of those, with gaps between them, and because the bottles are at different ages the five pockets are at different strengths as well. A machine rated by volume works the other way round: it releases continuously into air that is already moving, so the whole connected space settles at one level. This is the difference readers describe after switching, and they rarely describe it as stronger. They describe it as the same in the passage as in the living room, which is precisely what they were trying to buy in the first place.
Tip: if you can tell where the fragrance is coming from, you have a radius, not coverage.
2
Cost and upkeep over a year
Do the arithmetic on the whole year, not at the till
Six reeds at Rs 749 is roughly Rs 4,500 every time the bottles run dry, and you repeat that for as long as you own the house, plus six things to dust around and six refill dates you will not remember. Several ultrasonic units mean several tanks to fill, empty and clean, and none of them should be left standing with water in a room nobody opens. One machine is Rs 11,999 once, a 400ml tank lasting up to about 75 days, and about 1.5 units of electricity a month on a ten-hour daily schedule. In a large home that is usually cheaper within two or three years and immediately simpler. In a small home it is straightforwardly worse value, which is why we keep saying it: the arithmetic follows the size of the house.
3
Where multiple units genuinely win
Closed doors, separate floors, different scents, a staggered budget
Four honest cases. Rooms that stay shut cannot be reached by air from anywhere else, so a machine on the main floor will never scent a closed guest room or a bathroom, and a reed at Rs 749 in each of those is the correct purchase. Separate levels behave the same way unless a stairwell genuinely connects them. If you want different fragrances in different zones, a single machine cannot do it, because one tank means one scent at a time. And if the budget is easier in steps, buying a small unit now and a machine later is entirely sensible - we would rather you did that than stretch. There is also a small seasonal case for an ultrasonic unit: in a dry north Indian winter the humidity it adds is genuinely pleasant in a bedroom, which is an argument for it in that one room and never for a damp one.
Tip: buy per room only where a door stays shut. Everywhere else, buy per body of air.
A Sukoon at ₹1,899 is the small-machine answer for one dry room you open regularly, running on a water-based fragrance from ₹299.
See SOSA Sukoon →
The SOSA principle
One machine is not better than five small diffusers. It is better than five small diffusers in one body of air, which is a completely different claim and the only one worth making.
Where the air stops, the machine stops, and that is where a small unit earns its place.
Where the small units genuinely win
Four situations, and the answer changes completely between them. Two of these rows recommend against the machine.
The SOSA plan
One machine or several small units?
| Your situation | What it actually needs |
|---|---|
|
A large open floor, doors normally open
|
One SOSA Vaayu (₹11,999) on the air path. Rated to 1000m³, one level everywhere, one tank to refill. View → |
|
A guest room, bathroom or study whose door stays shut
|
A reed at ₹749 in that room. No machine elsewhere in the house can reach air behind a closed door. View → |
|
One dry bedroom you open daily and want a machine in
|
A SOSA Sukoon (₹1,899) with a water-based fragrance from ₹299. It adds humidity, so keep it out of damp or musty rooms. View → |
|
A small flat, or a budget better spent elsewhere
|
Neither. Reeds in the two rooms that matter, ventilation, and the money saved. We would rather you did that. |
If you are still working out whether an upgrade is justified at all, when you should upgrade to a whole-home scent machine gives the thresholds and the four reasons not to, and is the SOSA Vaayu worth it if regular home fragrance isn't strong enough takes the value question head on. The arithmetic behind the scatter problem is in why you need multiple diffusers to make your house smell good, and the wider diagnosis in why your house doesn't smell fresh even after cleaning.
One body of air, one machine
SOSA Vaayu ₹11,999 - waterless, 1000m³ (about 2,000-3,000 sq ft), 400ml tank up to about 75 days, 1h/4h/8h/24h timers, under 38dB.
One machine does not beat five diffusers. It beats five diffusers standing in the same body of air, which is where almost everybody has put them.
— Sonal Sahani, SOSA
Where several small units win
Closed doors, separate floors, different scents, a staggered budget
The SOSA specification for a large home
Three products, one question: does the air connect? Where it does, one machine is better on every axis that matters. Where it does not, a small unit in that room is the only thing that can work at all. All three are made in India, and a portion of every order supports girl-child education through Nanhi Kali.
The SOSA specification
One machine for the volume, one reed for the small room
| Machine | Best for | Why it works | Price |
|---|---|---|---|
|
SOSA Vaayu
|
A whole floor, an open plan, a large 3BHK or 4BHK, a villa level | Waterless nebuliser, 1000m³ (about 2,000-3,000 sq ft), 400ml tank up to about 75 days, 1h/4h/8h/24h app timers, adjustable intensity, under 38dB, 5W, auto-stop and key-lock | ₹11,999 View → |
|
Morning Freshness reed
|
A bathroom, a bedside, a study, an entrance console, a small cabin | Passive capillary reed at ₹749. No power, no flame, no noise, nothing to switch on, and genuinely the better product in a small space | ₹749 View → |
One technical distinction to keep straight, because it decides which small unit to buy. The Vaayu is waterless: it nebulises pure fragrance oil from a 400ml tank and adds no moisture. The Sukoon is ultrasonic: it mists water plus a water-based fragrance from ₹299 and adds humidity to the room, which is useful in a dry winter and wrong in a monsoon or a musty room. They are different systems and do not share fragrance. And a limit at the other end, so nobody buys the wrong thing in the other direction. One machine rated to 1000m³ genuinely covers most Indian homes, including large 3BHK and 4BHK flats and most villas, when the internal doors are open and it sits on the main air path. If your home is genuinely 8,000-10,000 sq ft, spread over three floors, or built around a double-height volume, one machine of this size is not the honest answer either, and we would rather size it with you than sell you something that will underperform. One check before you spend anything, because it is the most common reason an upgrade disappoints. Fragrance does not remove odour molecules. It adds fragrance on top of them. If what you are actually fighting is damp, a bin, a dried-out drain trap, a shoe cabinet, a fridge or a pet bed, then a bigger fragrance machine simply gives you a bigger version of both smells at once. No diffuser of any kind is an air purifier: it does not disinfect, dehumidify, remove off-gassing or make any health claim. Find the source, deal with it, open the windows and move some air through the house - and scent a home that is already clean. Ask us what fits your home and we will give you the honest count.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
The comparison people set up is one expensive machine against several cheap ones, and that is not the real comparison. The real one is whether the air in your home connects. Fragrance travels with air and stops where the air stops, so five small units standing in one open floor are five sources doing a fraction of one machine's job, while one machine cannot do anything at all for a bedroom with the door shut.
So for a large home my answer is usually the same: one Vaayu at ₹11,999 for the connected floor, rated to 1000m³, waterless so a monsoon does not become a problem, and a reed at ₹749 in each room whose door stays shut. If you want a small machine in one dry bedroom you open daily, the Sukoon at ₹1,899 is the honest size for that, provided you remember it mists water and adds humidity.
And the reasons to buy the small ones instead, which I put in writing because they are real: a shut door, a separate floor, a wish for different scents in different zones, or a budget that is easier in steps. One check before you spend anything, because it is the most common reason an upgrade disappoints. Fragrance does not remove odour molecules. It adds fragrance on top of them. If what you are actually fighting is damp, a bin, a dried-out drain trap, a shoe cabinet, a fridge or a pet bed, then a bigger fragrance machine simply gives you a bigger version of both smells at once. No diffuser of any kind is an air purifier: it does not disinfect, dehumidify, remove off-gassing or make any health claim. Find the source, deal with it, open the windows and move some air through the house - and scent a home that is already clean. SOSA's hotel-inspired fragrances are our own original interpretations of a style of scenting, composed in our own studio. SOSA is an independent Indian brand and is not affiliated with, or endorsed by, any hotel or hotel group. A portion of every order supports girl-child education through Nanhi Kali.
Frequently asked questions
Is the SOSA Vaayu better than several small diffusers for a large home?
For a large connected space, yes. The Vaayu at Rs 11,999 is rated to 1000 cubic metres, about 2,000 to 3,000 sq ft, and releases continuously into moving air, so one unit on the air path holds a whole floor at one level. Several small units each scent a radius, which gives you pockets with unscented gaps, several bottles at different ages and several refills to remember. Where small units win is on closed doors, separate floors, different scents per zone, and a budget that is easier in steps.
Is one big diffuser cheaper than five small ones?
In a large home over two or three years, usually yes. Six reeds at Rs 749 is about Rs 4,500 every time the bottles run dry, repeated indefinitely, plus six things to maintain. One Vaayu is Rs 11,999 once, with a 400ml tank lasting up to about 75 days and roughly 1.5 units of electricity a month on a ten-hour daily schedule. In a small home the arithmetic reverses and reeds are clearly better value.
What is the difference between the SOSA Vaayu and the SOSA Sukoon?
They are two different systems. The Vaayu at Rs 11,999 is waterless: it nebulises pure fragrance oil from a 400ml tank, adds no moisture and is rated for 1000 cubic metres, about 2,000 to 3,000 sq ft. The Sukoon at Rs 1,899 is ultrasonic: it mists water plus a water-based fragrance from Rs 299, suits a single room, and adds a little humidity to that room. The fragrances are not interchangeable between them, and in a damp or monsoon-affected room the waterless machine is the right choice.
Should I put a diffuser in every room?
Only in the rooms whose doors stay shut, because scent cannot travel into air that is cut off. Rooms whose doors stay open are part of one body of air and one correctly sized machine holds them all, so a unit in each of those is money spent twice. Walk the house with the doors as you actually keep them and count bodies of air rather than rooms.
Will one machine make a smell in a closed room go away?
No. Fragrance does not remove odour molecules, it adds fragrance on top of them, so a stronger machine over a damp cupboard, a bin, a dry drain trap or a pet bed gives you a stronger version of both smells at once. A diffuser is not an air purifier and does not disinfect, dehumidify or remove off-gassing. Find and fix the source first, ventilate properly, then scent a clean house. If a smell survives cleaning and airing, look for a leak or a drain before you buy any fragrance product.
Does the air connect? That is the whole question
SOSA — Home Fragrance Upgrades for large homes, open plans and floors that reeds cannot hold
The SOSA Vaayu (₹11,999) is a waterless cold-air nebuliser rated to 1000m³, about 2,000-3,000 sq ft, with a 400ml tank lasting up to about 75 days and 1h/4h/8h/24h timers. The SOSA Morning Freshness reed (₹749) is the right answer for every room whose door stays shut, and the SOSA Sukoon (₹1,899) is a single-room ultrasonic machine that mists water plus a water-based fragrance from ₹299 and adds humidity to that room. All made in India, and a portion of every order supports girl-child education through Nanhi Kali.
Ask us what fits your home → SOSA Vaayu · ₹11,999
One more look at both
Continue the read
More from SOSA
Editorial standards & sources
About this guide: Written by Sonal Sahani, ISIPCA Versailles-trained founder and perfumer at SOSA Home & Body. Product recommendations reflect the SOSA range; the planning advice applies to any brand.Facts verified 24 August 2026 against the live SOSA product pages: The SOSA Vaayu (₹11,999) is a waterless cold-air nebuliser rated to 1000m³, described by the manufacturer as approximately 2,000-3,000 sq ft, with a 400ml refillable tank lasting up to about 75 days depending on intensity and run hours, Bluetooth app and onboard button control, 1h/4h/8h/24h timers with adjustable intensity, operation under 38dB, DC 12V/1A at 5W, dimensions 165 x 80.5 x 215mm at 0.9kg, freestanding or wall and HVAC mounting, auto-stop and key-lock, and CE, RoHS and SGS certification. It uses no water and no heat, so it adds no dampness and leaves no residue. The SOSA Morning Freshness reed diffuser (₹749) is a passive reed diffuser: oil rises through the reeds by capillary action and evaporates from the exposed reed and the bottle neck, with no power, no flame, no noise and no schedule. Its output is set by the reeds, the oil and the room rather than by a control, which is what makes it right for a small room and unable to hold a large open volume. The SOSA Sukoon (₹1,899) is a 500ml ultrasonic cool-mist diffuser with a timer, sized for a single room. It is a different system from the Vaayu: it mists water plus a water-based fragrance made for ultrasonic diffusers, from ₹299, and because it mists water it adds a little humidity to the room it is in. The two machines do not share fragrance. Scent enhances the ambience and perceived quality of a space; it works alongside proper ventilation and cleaning and is not a substitute for either, and SOSA makes no claim that fragrance alone influences a purchase decision. The hotel-inspired scents are SOSA's own original interpretations; SOSA is an independent brand and is not affiliated with, or endorsed by, any hotel named for reference. Coverage, fragrance usage and running cost depend on the space, settings and hours of use, and are confirmed on a consultation. Prices and availability are subject to change - see the live product pages.