★ SOSA for Fine-Dining Restaurants and Restaurant Groups
In a semi-open restaurant the boundary is not where the architect drew it but where the air actually stops, and finding that line is the whole job
★ ★ ★ ★ ★
★★★★★
"My reception now smells like a five-star lobby. Guests comment on it before they even reach the desk."
SOSA Vaayu · lobby scenting
★★★★★
"Zero dampness, which was my worry in monsoon. The mist is completely dry and the scent carries across the whole salon."
SOSA Vaayu · spa & salon
★★★★★
"Set the timer once and forgot about it. Runs only during store hours, refills last weeks. Exactly what I wanted."
SOSA Vaayu · showroom
★★★★★
"Our old water diffuser couldn't fill the living-dining. This one does the whole floor and you can't hear it running."
SOSA Vaayu · large home
★★★★★
"The app scheduling is the best part - strong in the mornings, gentle in the evening. Clinic feels calm all day."
SOSA Vaayu · wellness studio
★★★★★
"Paired it with the SOSA hotel oils. The projection is genuinely lobby-strength - nothing like a plug-in."
SOSA Vaayu · workspace
★★★★★
"My reception now smells like a five-star lobby. Guests comment on it before they even reach the desk."
SOSA Vaayu · lobby scenting
★★★★★
"Zero dampness, which was my worry in monsoon. The mist is completely dry and the scent carries across the whole salon."
SOSA Vaayu · spa & salon
★★★★★
"Set the timer once and forgot about it. Runs only during store hours, refills last weeks. Exactly what I wanted."
SOSA Vaayu · showroom
★★★★★
"Our old water diffuser couldn't fill the living-dining. This one does the whole floor and you can't hear it running."
SOSA Vaayu · large home
★★★★★
"The app scheduling is the best part - strong in the mornings, gentle in the evening. Clinic feels calm all day."
SOSA Vaayu · wellness studio
★★★★★
"Paired it with the SOSA hotel oils. The projection is genuinely lobby-strength - nothing like a plug-in."
SOSA Vaayu · workspace
★ The machine for the enclosed part, once you have found where the enclosed part ends
SOSA SukoonOne small bounded volume, set once and lockedView ₹1,899SOSA SukoonA level you can switch off for a private lunchView ₹1,899SOSA Sukoon270-320 sq ft - which is most of these envelopesView ₹1,899
✓ Ultrasonic cool-mist diffuser covering roughly 270-320 sq ft, supplied with three 15ml fragrances, with a level you can set and a source you can switch off ✓ Sized to the enclosed non-dining envelope rather than to the restaurant, which in a semi-open building is usually a vestibule, a corridor and a washroom lobby ✓ Made in India · independent, not affiliated with any hotel · a portion funds girl-child education
Founder Diaries · Commercial Scenting Guides · Fine-Dining Restaurants
How do I find the boundary? Three checks, all free. Walk the opening with the back of your hand and feel where the cool air gives out - that is the real edge, not the door track. Hold a strip of tissue at nose height in the opening during service and watch which way it leans, then repeat it two hours later, because it changes. Finally, stand a fragrance blotter at your proposed machine position and walk outwards until you cannot smell it; that distance is your gradient, and it is usually two to three metres wide.
What does it cost once I have the line? Less than operators expect, because the subtraction is brutal. A 3,600 sq ft semi-open restaurant can be 1,500 sq ft of courtyard that contributes nothing, 1,300 sq ft of enclosed dining that stays unscented, and then a 150 sq ft entrance vestibule, a 90 sq ft corridor and an 80 sq ft washroom lobby. That is about 320 sq ft. Under about 750 sq ft the answer is a Sukoon at ₹1,899 or a ₹849 reed, and a Vaayu would be the wrong buy.
See the SOSA Sukoon Book a scenting plan
Facts verified 5 September 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 adjustable intensity, a 400ml refillable tank lasting 90+ days a fill depending on intensity and run hours, Bluetooth app and button control, 1h/4h/8h/24h timers, operation under 38dB at 5W, freestanding or wall and HVAC mounting, auto-stop and key-lock, and CE, RoHS and SGS certification, which are electrical and compliance marks and not medical approvals. Being waterless, it adds no moisture and leaves no residue on surfaces or equipment. The SOSA Sukoon (₹1,899) is an ultrasonic cool-mist diffuser covering roughly 270-320 sq ft and is supplied with three 15ml fragrances; the water-based Hotel Collection (₹299 / ₹999 / ₹1,799) is an ultrasonic fragrance and is not a refill for a waterless cold-air machine. SOSA reed diffusers are alcohol-free and phthalate-free, with 50ml lasting about 6-8 weeks and 130ml about 14-18 weeks. Cold-air refill oil for the Vaayu is not currently sold separately - the machine ships with 400ml included and further refills should be confirmed with SOSA. Warranty, annual maintenance, installation and bulk terms are not published and should be confirmed before ordering. Ambient scent is an interior and hospitality decision: it makes no clinical, therapeutic or wellbeing claim, it works alongside proper extraction, grease management, drainage, cleaning and air change and is never a substitute for any of them, it is never used to mask or remove another smell, and no claim is made that fragrance influences a guest's decision or any commercial outcome. Dining rooms, chef's tables, tasting-menu rooms and food-preparation areas are left unscented, no machine is placed where its output can reach a table or a pass, no fragrance is described as food-safe or safe for use around food, and the operator's own kitchen consultant and local food-safety and fire authority govern anything sited near a kitchen. Fragrance oil is flammable and is kept away from open flame and heat. The chef's judgement overrides any scenting plan in their own room. 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.
Semi-open is an architectural word, not a physical one, and it hides the only fact that matters: somewhere in your restaurant there is a place where conditioned air gives up and outside air takes over. Nobody has drawn that place on your plan. Until you have walked it and marked it, no scenting decision you make is better than a guess.
Quick answers — read this first
Does professional scenting work in a semi-open restaurant? In the genuinely enclosed part, yes. In the open part, no, and no setting changes that. The useful question is not whether your restaurant is semi-open but where the enclosure actually ends - and that is almost never at the line on the drawing. It is wherever the conditioned air stops winning against the outside. Find that place on foot, before you look at a product, and the plan becomes obvious: scent what is behind the line, leave everything in front of it alone.How do I find the boundary? Three checks, all free. Walk the opening with the back of your hand and feel where the cool air gives out - that is the real edge, not the door track. Hold a strip of tissue at nose height in the opening during service and watch which way it leans, then repeat it two hours later, because it changes. Finally, stand a fragrance blotter at your proposed machine position and walk outwards until you cannot smell it; that distance is your gradient, and it is usually two to three metres wide.
What does it cost once I have the line? Less than operators expect, because the subtraction is brutal. A 3,600 sq ft semi-open restaurant can be 1,500 sq ft of courtyard that contributes nothing, 1,300 sq ft of enclosed dining that stays unscented, and then a 150 sq ft entrance vestibule, a 90 sq ft corridor and an 80 sq ft washroom lobby. That is about 320 sq ft. Under about 750 sq ft the answer is a Sukoon at ₹1,899 or a ₹849 reed, and a Vaayu would be the wrong buy.
The short answer
Short answer: yes, but only inside the part that is genuinely enclosed, and that boundary sits where the conditioned air stops rather than where the drawing shows a wall. Scent the enclosed non-dining rooms - the vestibule, the corridor, the washroom lobby - and leave the open seating and the transition alone, accepting a gradient two to three metres wide at the edge instead of a clean line. About 320 sq ft of envelope is a Sukoon at ₹1,899, not a Vaayu.
The pick: one SOSA Sukoon (₹1,899) in the enclosed vestibule or corridor, set low and placed a full volume back from the opening - or a Mountain Breeze reed (₹849) where that envelope is a single room under about 300 sq ft, with a Morning Freshness reed (₹749) in the washrooms.
Next step: walk the opening with a strip of tissue at two different hours, mark on your plan where the cool air actually gives out, and send us that marked plan rather than the architect's - we will tell you which rooms are behind your line and which of them we would still refuse - Ask for a restaurant scenting plan.
In this guide
Everything in this post turns on line two. Operators keep asking me to choose a level, when the decision they have not made yet is where their building actually stops.
The machine for one small enclosed volume - tap to see the specification
For an enclosed vestibule, corridor and washroom lobby of about 300-750 sq ft
SOSA Sukoon ₹1,899
The line this whole post is about
Where should the food aroma end and the signature begin?
Get the zoning confirmed
Free restaurant scenting plan
Straight answer
Does professional scenting work in a semi-open restaurant?
In the part that is genuinely enclosed, yes. In the open part, no, and no machine setting changes that, because ambient scenting needs bounded air and open air has none. So the whole decision collapses into one question that nobody has answered for you yet: where does your enclosure actually end? It is not where the drawing shows a wall, and it is not where the floor finish changes from timber to stone. It is wherever the conditioned air stops winning against the air coming in, and in most semi-open restaurants that place is somewhere inside the building rather than at the opening - three metres behind a folding frontage, or halfway along a courtyard-facing gallery. The second thing to accept is that it is not a line. Air does not stop; it thins. What you get at the edge of an enclosure is a gradient, usually two to three metres wide, over which a level falls away to nothing, and that gradient shifts with the hour, the wind and whether the doors happen to be folded back. Any plan that promises you a crisp boundary is describing a drawing rather than a building. Once you hold both of those facts, the plan writes itself. Scent only the rooms that sit comfortably behind your line and contain no tables: an entrance vestibule, an internal corridor, a washroom lobby, a waiting area with a door. Everything in front of the line, and every table on either side of it, stays unscented - not lightly, unscented - and no machine goes anywhere its output can reach a table, which in these buildings usually means a full volume back from the opening rather than a polite two metres. If your enclosed part is itself the dining room, and many semi-open restaurants are exactly that, then the honest answer for your building is a reed in the washroom and nothing else. The register is dry, mineral and deliberately inedible - pine, sage and cedar, cool stone, a dry tea - so nothing at your door is mistaken for something the kitchen is making. Then the arithmetic, which is unkind. A 3,600 sq ft semi-open restaurant is routinely 1,500 sq ft of courtyard that contributes nothing at all, 1,300 sq ft of enclosed dining that stays untouched, and an envelope of a 150 sq ft vestibule, a 90 sq ft corridor and an 80 sq ft washroom lobby: about 320 sq ft, or roughly 30m² at 3m, which is about 90m³. Under about 750 sq ft the answer is a SOSA Sukoon at ₹1,899 or an ₹849 Mountain Breeze reed, and a Vaayu would be the wrong buy. The standing limits, plainly: this is an ambience decision like lighting, it is never a mask for kitchen, drain or bin odour, the dining areas stay unscented on both sides of the line, and your chef's judgement overrides this plan in their own room. Ask for a restaurant scenting plan and send the plan with your own line marked on it.
Find where the conditioned air actually gives out, mark it, and scent only the enclosed non-dining rooms behind it - expecting a two to three metre gradient at the edge rather than a clean boundary. That envelope is usually about 320 sq ft, which is a Sukoon at ₹1,899 or an ₹849 reed rather than a Vaayu.
For one enclosed vestibule or corridor, the machine is a SOSA Sukoon - ultrasonic, roughly 270-320 sq ft, supplied with three 15ml fragrances, with a level you set and a source you can switch off for a private lunch. ₹1,899. For a single room under about 300 sq ft, a Mountain Breeze reed at ₹849 does the same job with no power.
See the SOSA Sukoon ₹1,899 Ask for a restaurant scenting plan
The fact that decides everything else
Air does not stop where a wall does - it thins over two or three metres
The machine for the enclosed part
Two honest answers, and both of them are small, because the enclosed non-dining part of a semi-open restaurant is small. Which one is right depends on whether that part is one room or two or three with doors between them. The images link to the product pages so you can read the specification first.
An enclosed envelope of roughly 300-750 sq ft
SOSA Sukoon
Ultrasonic cool-mist diffuser covering roughly 270-320 sq ft, supplied with three 15ml fragrances. The reason to choose it over a reed in a semi-open building is control: you can set a level low enough to survive the gradient at the opening, and switch it off entirely when the frontage is folded back on a good evening.
From ₹1,899
A single enclosed room under about 300 sq ft
Mountain Breeze reed
Pine, sage and cedar on an alcohol-free, phthalate-free coconut-derived base, 6 fibre reeds flipped weekly. 50ml runs 6-8 weeks at ₹849 and 130ml 14-18 weeks at ₹1,349. Continuous, silent and unpowered, which suits an unstaffed vestibule - and it has no off switch, which is why it never goes near seating.
From ₹849
The three tests that find your boundary
None of these needs a meter, a consultant or a supplier, and all three can be done before dinner tonight. Do them in this order, because each one tells you something the next one needs.
1
Feel for the edge
The boundary is where the conditioned air gives up, not where the glass is
Walk slowly from the deepest enclosed point out towards the opening with the back of your hand held at shoulder height, during service, with the air conditioning running as it normally does. You will feel the cool give way, and it will happen somewhere you did not expect - often several metres inside the frontage, because an air curtain or a split unit only throws so far and a folded-back frontage lets the outside come to meet it. Mark that place on the floor with a piece of tape. Do it again on a still day and on a windy one. The zone between the two marks is the part of your building that is sometimes indoors and sometimes not, and nothing goes in it.
Tip: Mark it in tape on the floor, not in pen on a drawing. The drawing will flatter you.
2
Watch which way the air goes
A tissue at nose height, twice, tells you where your fragrance would end up
Hold a strip of tissue at nose height in the opening and at each internal doorway during service and watch which way it leans. If air is moving from your enclosed vestibule outwards, a source in the vestibule stays in the vestibule and you have a workable plan. If it is moving inwards from the courtyard, that inward flow will carry whatever you release into the enclosed seating instead, and the honest answer is that the vestibule is the wrong room for a machine. Repeat it two hours later, because a restaurant's air changes direction when the kitchen extraction ramps up - the extract is usually the strongest air mover in the building and it pulls towards itself.
Tip: Check it once at six and once at nine. If the two disagree, plan for the one that ends over a table.
3
Measure your gradient, then subtract
A blotter walk gives you the width of the fade, and the subtraction gives you the machine
Put a fragrance blotter, or a reed, at the exact position you are considering, leave it an hour, then walk outwards in half-metre steps until you genuinely cannot smell it. That distance is your gradient, and in a semi-open building it is commonly two to three metres. Keep that whole gradient inside non-dining space: if the nearest table falls inside it, the position is wrong and no lower setting rescues it, because the fade gets narrower rather than disappearing. Then add up only the rooms behind your tape: vestibule, corridor, washroom lobby. Our own Fresh Brew at ₹849 is exactly what to avoid at a restaurant threshold, coffee being the one direction guaranteed to send a guest hunting for a dessert you do not serve.
One Morning Freshness reed diffuser ₹749, set once and left alone, is the whole hardware side of this.
See SOSA Morning Freshness reed diffuser →
The SOSA principle
In a semi-open restaurant the boundary is not where the architect drew it but where the conditioned air stops winning, and the two are rarely within three metres of each other.
Which is why I ask for a plan with tape marks on the floor before I will quote a machine for one of these buildings.
The plan, from inside out
Here is the semi-open answer as a plan, read from the deepest enclosed room outwards to the open air, which is the order the decision actually gets harder in.
The SOSA plan
A semi-open restaurant, zone by zone, behind and in front of the line
| The zone | What to do |
|---|---|
|
Enclosed entrance vestibule
|
Scented, if it is behind your tape and holds no tables. One small source, low, placed a full volume back from the opening so the whole gradient stays inside non-dining space. |
|
Internal corridor and washroom lobby
|
Scented, and usually the most reliably bounded air in the whole building, because these are the only rooms with doors at both ends. This is the part of the envelope nobody counts. |
|
Washrooms
|
Yes, and the one room where a brighter citrus-mint earns its keep, because it reads as cleaned. Small volume, so a reed or a small machine rather than anything larger. |
|
The transition zone between your two tape marks
|
Nothing. This strip is indoors on a still evening and outdoors on a windy one, so no level you set for it is right twice. Treat it as open air and leave it empty. |
|
Enclosed dining and the bar counter
|
Unscented, permanently. If your enclosed part is essentially the dining room, then your restaurant has no scentable arrival volume and the honest plan is a washroom reed and nothing else. |
|
Courtyard, terrace and open seating
|
Unscented, and not because of dosage. There is no bounded air to hold a level, so a source out there produces consumption rather than atmosphere - and people are eating. |
If your building is open at the top rather than at the side, the same physics gives a shorter answer in whether a rooftop restaurant should use ambient fragrance, where the whole plan moves downstairs. And for the general method of drawing these boundaries across a building that is part indoors and part out, the family pillar is how restaurants with indoor and outdoor sections should approach scent zoning. SOSA is independent and not affiliated with any hotel.
One bounded room, one low level, one off switch
SOSA Sukoon ₹1,899 covers roughly 270-320 sq ft, which is most of the enclosed non-dining space a semi-open restaurant actually has.
The most useful thing I have ever taken into a semi-open restaurant is a roll of low-tack floor tape. You put a strip on the floor where the cool air gives out, and the argument about machines is over in ten minutes.
— Sonal Sahani, SOSA
Why small and switchable beats large and loud here
A building that changes shape every evening needs a source you can turn off
The SOSA semi-open specification
Two products cover nearly every semi-open restaurant, and both of them are small, because the enclosed non-dining part of these buildings is small. A third line exists only for the rare case where a vestibule, gallery and washroom lobby are one large connected indoor volume. Made in India, and a portion of every order supports girl-child education through Nanhi Kali.
The SOSA restaurant specification
Behind the line only, set low, with the whole gradient inside non-dining space
| Machine | Best for | Why it works | Price |
|---|---|---|---|
|
SOSA Sukoon
|
An enclosed non-dining envelope of roughly 300-750 sq ft | 270-320 sq ft coverage with three 15ml fragrances included, an adjustable level and an off switch for the evenings the frontage is folded back. A Vaayu at this size would be the wrong buy | ₹1,899 View → |
|
SOSA Mountain Breeze reed diffuser
|
A single enclosed vestibule under about 300 sq ft | Pine, sage and cedar, dry and unmistakably not-food, continuous and unpowered. No off switch, which is why it stays out of seating and out of the transition zone | ₹849 View → |
 SOSA Vaayu
|
The rare case of a large connected indoor arrival, gallery and washroom lobby | 1000m³, waterless, app timers, key-lock, under 38dB, wall or HVAC mountable so the output stays on the arrival side of your tape. Only once the envelope is genuinely past 1,500 sq ft | ₹11,999 View → |
Mark your boundary on the floor before you price anything, keep the whole fragrance gradient inside non-dining space, and set the level for a guest walking back out past it at the end of a long dinner. Ambient scent here is an ambience decision like lighting; it is never a mask for cooking, grease, a drain or a bin store; and all dining areas, the bar counter and the open seating stay unscented, with no machine placed where its output can reach a table. I will not describe any fragrance as food-safe or safe for use around food, because we have not tested for that and will not imply it, and anything sited near a food-preparation area is a question for your kitchen consultant and your local authority rather than for me. Fragrance oil is flammable and both oil and machine are kept away from open flame and heat, which in a semi-open restaurant means patio heaters, table candles and a wood-fired oven standing in the room. And plainly: SOSA does not publish a business-outcome number because it has not measured one. Ask for a restaurant scenting plan before you spend anything.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
What I am usually sent for these buildings is a beautiful plan with a dashed line on it labelled semi-open, and what I ask for instead is a photograph of tape stuck to a floor. Semi-open is a word an architect uses to describe an intention. It tells me nothing about whether there is a volume of air in the building that will hold a level, which is the only thing a fragrance decision depends on. So the first thing I do is ask the operator to walk their own opening with the back of their hand and find out where the cool air gives out. About half of them come back surprised, because the answer is three or four metres inside the building rather than at the frontage.
The second surprise is the gradient. Everybody expects fragrance to stop at a threshold the way light stops at a wall, and it does not - it fades over two or three metres, and the fade moves with the wind and with whether your doors are folded back. That is why the machine goes a whole volume back from the opening rather than a polite couple of metres, and why the honest instruction on a fine evening is to switch it off rather than to turn it up. In a building whose shape changes every night, an off switch is worth more than capacity, which is the one argument for a machine over a reed in this family.
On hardware I would rather undersell. A single enclosed vestibule under about 300 sq ft is a Mountain Breeze reed at ₹849. An enclosed envelope of 300 to 750 sq ft is a Sukoon at ₹1,899, and that covers most semi-open restaurants I see. The washroom is Morning Freshness at ₹749. A Vaayu at ₹11,999 only enters this conversation if you have a genuinely large connected indoor arrival, and in a semi-open building that is rare. If your enclosed part is the dining room, buy the washroom reed and nothing else. Made in India, and a portion of every order supports girl-child education through Nanhi Kali.
Frequently asked questions
Does professional scenting work in a semi-open restaurant?
In the genuinely enclosed part, yes. In the open part, no, because ambient scenting needs bounded air and no setting substitutes for it. The decision you have to make first is where your enclosure really ends, which is where the conditioned air stops winning rather than where the drawing shows a wall. Scent the enclosed non-dining rooms behind that point - vestibule, corridor, washroom lobby - and leave the open seating and the transition zone alone.
How do I find where the enclosed part actually ends?
Three free checks. Walk from the deepest enclosed point out towards the opening with the back of your hand at shoulder height and feel where the cool air gives out, then mark it with floor tape. Hold a strip of tissue at nose height in the opening and at each internal doorway and note which way it leans, twice, two hours apart. Then stand a blotter at your proposed position and walk outwards until you cannot smell it - that distance is your gradient.
Will the fragrance stop at the boundary?
No, and expecting it to is the most common planning error in these buildings. Air thins rather than stopping, so what you get is a gradient, typically two to three metres wide, that shifts with the hour, the wind and whether your frontage is folded back. Plan for the fade instead of a line: keep the entire gradient inside non-dining space, which usually means placing the source a full volume back from the opening rather than a couple of metres.
Can I scent the enclosed dining area if the open part is separate?
No. Enclosure changes whether fragrance can hold a level; it does not change the rule about food. The dish on the plate is the composition your guest paid for, so all dining areas stay unscented on both sides of the line - not lightly, unscented - and no machine goes anywhere its output can reach a table. If your enclosed part is essentially the dining room, the honest plan for your building is a washroom reed and nothing else.
What size machine does a semi-open restaurant need?
Smaller than the building suggests, because you size the enclosed non-dining envelope rather than the restaurant. A 3,600 sq ft semi-open restaurant can be 1,500 sq ft of courtyard that contributes nothing, 1,300 sq ft of unscented enclosed dining, and a 320 sq ft envelope of vestibule, corridor and washroom lobby. Under about 750 sq ft the honest answer is a Sukoon at Rs 1,899 or a reed at Rs 849, and a Vaayu at Rs 11,999 would be the wrong buy.
Find the line, then scent only what is behind it
SOSA — Clinic Scenting for semi-open and courtyard restaurants
The SOSA Sukoon (₹1,899) covers roughly 270-320 sq ft with three 15ml fragrances included, which suits the enclosed vestibule, corridor and washroom lobby that a semi-open restaurant actually has; a Mountain Breeze reed (₹849) is enough for one small room and a Morning Freshness reed (₹749) suits the washrooms. At this envelope a Vaayu at ₹11,999 would be the wrong buy. The open seating, the transition zone and every table stay unscented. Made in India, and a portion of every order supports girl-child education through Nanhi Kali. Send the plan with your own tape marks on it.
Ask for a restaurant scenting plan → SOSA Sukoon · ₹1,899
One more look at the Sukoon
Continue the read
More from SOSA
- SOSA Sukoon - the small machine for one enclosed non-dining volume in a semi-open restaurant (₹1,899)
- Should a rooftop restaurant use ambient fragrance?
- Can I scent the restaurant entrance without fragrancing the dining area?
- Ask us: Ask for a restaurant scenting plan
- Brand: Founder story — why SOSA exists
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 5 September 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 adjustable intensity, a 400ml refillable tank lasting 90+ days a fill depending on intensity and run hours, Bluetooth app and button control, 1h/4h/8h/24h timers, operation under 38dB at 5W, freestanding or wall and HVAC mounting, auto-stop and key-lock, and CE, RoHS and SGS certification, which are electrical and compliance marks and not medical approvals. Being waterless, it adds no moisture and leaves no residue on surfaces or equipment. The SOSA Sukoon (₹1,899) is an ultrasonic cool-mist diffuser covering roughly 270-320 sq ft and is supplied with three 15ml fragrances; the water-based Hotel Collection (₹299 / ₹999 / ₹1,799) is an ultrasonic fragrance and is not a refill for a waterless cold-air machine. SOSA reed diffusers are alcohol-free and phthalate-free, with 50ml lasting about 6-8 weeks and 130ml about 14-18 weeks. Cold-air refill oil for the Vaayu is not currently sold separately - the machine ships with 400ml included and further refills should be confirmed with SOSA. Warranty, annual maintenance, installation and bulk terms are not published and should be confirmed before ordering. Ambient scent is an interior and hospitality decision: it makes no clinical, therapeutic or wellbeing claim, it works alongside proper extraction, grease management, drainage, cleaning and air change and is never a substitute for any of them, it is never used to mask or remove another smell, and no claim is made that fragrance influences a guest's decision or any commercial outcome. Dining rooms, chef's tables, tasting-menu rooms and food-preparation areas are left unscented, no machine is placed where its output can reach a table or a pass, no fragrance is described as food-safe or safe for use around food, and the operator's own kitchen consultant and local food-safety and fire authority govern anything sited near a kitchen. Fragrance oil is flammable and is kept away from open flame and heat. The chef's judgement overrides any scenting plan in their own room. 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.