★ SOSA Vaayu · what to ask before you buy
A machine is the cheap part of a scenting system; the fragrance supply, the spares and the warranty are what you are really buying
★ ★ ★ ★ ★
★★★★★
"I sent these twelve questions to three sellers. Two never answered the refill one. That told me everything I needed."
Compared three sellers
★★★★★
"The coverage-basis question is the one that exposed it — one seller was quoting a volume number as if it were floor area."
Showroom owner
★★★★★
"A brand that lists its own weak answers in a table is a brand I will buy from. We did, with our eyes open."
Vaayu ₹11,999
★★★★★
"Asked about spare parts and got told plainly to check rather than a made-up answer. That is worth more than a promise."
Villa owner
★★★★★
"Five watts. I did the sum myself from the number they published and stopped worrying about the electricity bill."
Boutique hotel
★★★★★
"We ended up not buying the big machine at all after question three. Two smaller ones suited our layout better."
Two Sukoons
★★★★★
"I sent these twelve questions to three sellers. Two never answered the refill one. That told me everything I needed."
Compared three sellers
★★★★★
"The coverage-basis question is the one that exposed it — one seller was quoting a volume number as if it were floor area."
Showroom owner
★★★★★
"A brand that lists its own weak answers in a table is a brand I will buy from. We did, with our eyes open."
Vaayu ₹11,999
★★★★★
"Asked about spare parts and got told plainly to check rather than a made-up answer. That is worth more than a promise."
Villa owner
★★★★★
"Five watts. I did the sum myself from the number they published and stopped worrying about the electricity bill."
Boutique hotel
★★★★★
"We ended up not buying the big machine at all after question three. Two smaller ones suited our layout better."
Two Sukoons
★ ★ Every specification, published and checkable ₹11,999 The machine with a settled fragrance supply ₹1,899
✓ Twelve questions for any seller · our answers given in full, including the weak ones ✓ Vaayu · up to 1000m³ · 400ml · 90+ days a fill · under 38 dB · 5W · CE, RoHS, SGS ✓ No separate Vaayu refill oil is sold today — ask SOSA about availability before buying
Founder Diaries · Large-Space Scenting · Buyer Protection
The question that decides year two: "Is the fragrance for this machine sold separately, and at what price?" For the Vaayu, our honest answer today is no — 400ml comes in the box and no separate refill oil is sold.
The trap question: "Is this the same oil as your other machines use?" For us it is not: cold-air oil is undiluted, the Hotel Collection is water-based for ultrasonic tanks, and they are not interchangeable.
Four we cannot answer: warranty length, spare parts, installation service and bulk terms. Ask SOSA directly rather than accepting anything you read, here or elsewhere.
Hotel Collectionfrom ₹299The hardware is bought once; the fragrance is bought forever. A machine whose oil is not listed with a price, in a size, on a page you can reach, is a machine that may quietly become an ornament. Ask for the price per millilitre and work out your own annual cost against your run hours. Here is our answer, and it is the weakest one on this page: SOSA does not currently sell a separate refill oil for the Vaayu. The 400ml that ships in the box — four Hotel Collection fragrances at 100ml each — is the whole cold-air supply available from us today, specified at 90+ days per fill. I am not going to dress that up. If long-term supply matters to you, ask us for the current position before you order, and weigh the answer properly. It is exactly the question I would want a buyer to put to a competitor, so it would be dishonest to duck it here.
The specification, in full₹11,999Shop → 
Water-based · for ultrasonics onlyfrom ₹299Shop → 
Supply question already settled₹1,899Shop →
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.
A large-space scent machine is the most opaque thing sold in home fragrance. The coverage numbers are unexplained, the fragrance is a separate purchase that is rarely priced on the same page, and the questions that decide whether you are still happy in year two — spares, warranty, supply — are almost never answered before checkout. So this page is a list of twelve questions to put to any seller, ours included, and our own answers to all twelve, given honestly. Four of them we answer well because the specification is published and checkable. Four we answer adequately. And four we answer badly, which I would rather write down here than have you discover after you have spent ₹11,999.
Quick answers — read this first
The single most revealing question: "Is the coverage figure a volume or an area, and at what ceiling height?" A seller who cannot answer that has not measured anything.The question that decides year two: "Is the fragrance for this machine sold separately, and at what price?" For the Vaayu, our honest answer today is no — 400ml comes in the box and no separate refill oil is sold.
The trap question: "Is this the same oil as your other machines use?" For us it is not: cold-air oil is undiluted, the Hotel Collection is water-based for ultrasonic tanks, and they are not interchangeable.
Four we cannot answer: warranty length, spare parts, installation service and bulk terms. Ask SOSA directly rather than accepting anything you read, here or elsewhere.
The short answer
Short answer: before buying any large-space scent diffuser, get written answers to twelve things — what the coverage figure is based on, whether refill fragrance is sold and at what price, whether that fragrance is the same as the seller's other machines use, tank size and realistic consumption, warranty, spare parts, noise in dB, power draw in watts, mounting options and whether installation costs extra, certification, control and what happens if the app fails, and the returns policy once the fragrance is opened. A seller who answers all twelve in writing is a seller worth buying from.
Why it matters: the machine is the cheap part. What you are actually buying is a system that has to keep working — fragrance you can re-order, a unit that can be serviced, and a coverage claim that matches your building. A machine with an unanswered supply question is a machine with an expiry date attached, however good the hardware is.
Our published specification: Vaayu ₹11,999 — up to 1000m³, 400ml tank, 90+ days a fill at mid intensity, 1h/4h/8h/24h timers, adjustable intensity, auto-stop, key-lock, Bluetooth app plus onboard buttons, under 38 dB, DC 12V/1A at 5W, 0.9 kg, freestanding or wall/HVAC mount, CE, RoHS and SGS certified, four 100ml fragrances in the box. Free shipping above ₹499.
In this guide
Specification published in full
Vaayu · ₹11,999 · up to 1000m³
Fragrance supply that is settled
Sukoon · ₹1,899 · 270–320 sq ft
Priced, in three sizes
Hotel Collection · from ₹299
Straight answer
What should you ask before buying a large-space scent diffuser?
1. What is the coverage figure based on — volume or floor area, and at what ceiling height? Ours is a volume figure: up to 1000m³, translated as roughly 2,000–3,000 sq ft because 1000 ÷ 3m ≈ 333m² ≈ 3,585 sq ft while 1000 ÷ 4.5m ≈ 222m² ≈ 2,390 sq ft.
2. Is refill fragrance sold separately, and at what price per millilitre? Our honest answer for the Vaayu today is that no separate refill oil is sold. 400ml ships in the box; confirm current availability with SOSA before purchasing.
3. Is that fragrance the same one your other machines take? For us, no. Cold-air oil is nebulised undiluted; the Hotel Collection at 15ml ₹299, 100ml ₹999 and 300ml ₹1,799 is water-based for ultrasonic tanks and does not go in a Vaayu, despite sharing scent names.
4. What is the tank size, and what does one fill really last at my usage? 400ml, specified at 90+ days a fill at a mid intensity setting — a reference point, not a promise, since consumption moves with intensity, run hours and room volume.
5. What warranty, and for how long? Not a figure we can quote. Ask SOSA directly and get it in writing.
6. Are spare parts available, and which ones? Also not something we publish. Ask before you buy.
7. How loud is it in decibels? Under 38 dB, published.
8. What does it draw? DC 12V / 1A, 5W. That is 5W × 8 hrs = 40Wh = 0.04 kWh a day, or about 1.2 kWh a month; at 24 hours it is 0.12 kWh a day, about 3.6 kWh a month. Multiply by your own per-unit tariff — tariffs vary by state and we are not quoting a bill.
9. How does it mount, and does mounting or installation cost extra? Freestanding, or wall and HVAC mounted; 0.9 kg. Whether an installation service exists is a question for SOSA.
10. What certification does it carry? CE, RoHS and SGS.
11. What are the controls, and does it work if the app does not? Bluetooth app plus onboard buttons, so the machine is operable without a phone; 1h/4h/8h/24h timers, adjustable intensity, auto-stop, key-lock. Which platforms the app supports is not something we can confirm here.
12. What is the returns policy, and does opening the fragrance affect it? Ask SOSA before ordering rather than after.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
2. Is refill fragrance sold separately, and at what price per millilitre? Our honest answer for the Vaayu today is that no separate refill oil is sold. 400ml ships in the box; confirm current availability with SOSA before purchasing.
3. Is that fragrance the same one your other machines take? For us, no. Cold-air oil is nebulised undiluted; the Hotel Collection at 15ml ₹299, 100ml ₹999 and 300ml ₹1,799 is water-based for ultrasonic tanks and does not go in a Vaayu, despite sharing scent names.
4. What is the tank size, and what does one fill really last at my usage? 400ml, specified at 90+ days a fill at a mid intensity setting — a reference point, not a promise, since consumption moves with intensity, run hours and room volume.
5. What warranty, and for how long? Not a figure we can quote. Ask SOSA directly and get it in writing.
6. Are spare parts available, and which ones? Also not something we publish. Ask before you buy.
7. How loud is it in decibels? Under 38 dB, published.
8. What does it draw? DC 12V / 1A, 5W. That is 5W × 8 hrs = 40Wh = 0.04 kWh a day, or about 1.2 kWh a month; at 24 hours it is 0.12 kWh a day, about 3.6 kWh a month. Multiply by your own per-unit tariff — tariffs vary by state and we are not quoting a bill.
9. How does it mount, and does mounting or installation cost extra? Freestanding, or wall and HVAC mounted; 0.9 kg. Whether an installation service exists is a question for SOSA.
10. What certification does it carry? CE, RoHS and SGS.
11. What are the controls, and does it work if the app does not? Bluetooth app plus onboard buttons, so the machine is operable without a phone; 1h/4h/8h/24h timers, adjustable intensity, auto-stop, key-lock. Which platforms the app supports is not something we can confirm here.
12. What is the returns policy, and does opening the fragrance affect it? Ask SOSA before ordering rather than after.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
TL;DR: ask twelve things in writing — coverage basis, refill availability and price, oil compatibility, tank and real consumption, warranty, spares, dB, watts, mounting and install cost, certification, controls and app dependency, and returns. Any seller who will not answer the refill question is asking you to buy a machine with an expiry date.
The specification, as published
SOSA Vaayu · waterless cold-air nebuliser ₹11,999
Everything a buyer can check before ordering: coverage up to 1000m³, a 400ml refillable tank rated at 90+ days per fill at mid intensity, timers at 1h, 4h, 8h and 24h with adjustable mist intensity, auto-stop and a key-lock, Bluetooth app alongside onboard buttons, under 38 dB, DC 12V/1A at 5W, 165 × 80.5 × 215 mm at 0.9 kg in black or white, freestanding or wall and HVAC mounted, CE, RoHS and SGS certified, made in India. Four Hotel Collection fragrances at 100ml each in the box, in one of three combos chosen at checkout. And the thing the specification sheet does not tell you: no separate refill oil is sold for it today.
Part one — the three questions that tell you who you are dealing with
All twelve are worth asking, but three of them do most of the work, because they are the three a vague seller cannot bluff for long. They test whether the seller has measured anything, whether the product is a system or a single transaction, and whether they understand their own fluids. Send them by email or on chat, so the answers are written down. A brand that responds with a specification is a brand that has one; a brand that responds with adjectives is telling you something too.
1
QUESTION ONE · THE BASIS
"Is your coverage figure a volume or an area?"
Scent machines are rated on the volume of air they can carry fragrance through, which is why serious specifications are written in cubic metres. Square-footage numbers are translations of those, and a translation needs a ceiling height to be meaningful. A seller quoting "5,000 sq ft" with no stated ceiling height has either converted from a volume figure and not said so, or is quoting a number that came from nowhere. Our own figure is up to 1000m³, and the 2,000–3,000 sq ft you see is a deliberately conservative translation: 1000 ÷ 3m ≈ 333m² ≈ 3,585 sq ft at a standard slab, but only 1000 ÷ 4.5m ≈ 222m² ≈ 2,390 sq ft under a high one. Ask for the cubic-metre figure and do your own division. It takes a minute and it is the single most protective thing on this page.
The rule: if the answer has no cubic metres in it anywhere, you are being sold a feeling rather than a capacity.
2
QUESTION TWO · THE SUPPLY
"What does the fragrance cost, and can I buy it today?"
Hotel Collectionfrom ₹299The hardware is bought once; the fragrance is bought forever. A machine whose oil is not listed with a price, in a size, on a page you can reach, is a machine that may quietly become an ornament. Ask for the price per millilitre and work out your own annual cost against your run hours. Here is our answer, and it is the weakest one on this page: SOSA does not currently sell a separate refill oil for the Vaayu. The 400ml that ships in the box — four Hotel Collection fragrances at 100ml each — is the whole cold-air supply available from us today, specified at 90+ days per fill. I am not going to dress that up. If long-term supply matters to you, ask us for the current position before you order, and weigh the answer properly. It is exactly the question I would want a buyer to put to a competitor, so it would be dishonest to duck it here.
The tell: a seller who answers every question except this one has answered this one.
3
QUESTION THREE · THE FLUIDS
"Is this the same oil your other machines take?"
Most sellers of large-space machines also sell small ones, and the fragrance ranges frequently share names across both. They are usually not the same product. A cold-air nebuliser atomises undiluted oil; an ultrasonic machine vaporises a water-and-fragrance mix from a tank. Putting the wrong one in either is a mistake that can end a machine. Our own line is a case in point, and our product page has been looser about it than it should be: the Hotel Collection at 15ml ₹299, 100ml ₹999 and 300ml ₹1,799 is water-based, for the Sukoon, Boond and Megh, and is not a Vaayu refill. Nor does reed diffuser oil go in any machine at all. If a comparison anywhere prices a cold-air machine's running cost using ultrasonic fragrance prices, the arithmetic is describing a different product.
Part two — the twelve questions, with our own answers marked honestly
Copy the left column into an email. The right column is how we answer each one for the Vaayu today, graded: Published means it is a checkable specification, Partial means the figure exists but has conditions, and Weak means we cannot answer it and you should ask us directly rather than take anything on trust.
The buyer's checklist
Twelve questions for any seller — and SOSA's answers
| Ask this | Why it matters | What a good answer sounds like | SOSA's answer for the Vaayu | Grade |
|---|---|---|---|---|
| 1. Coverage — volume or area? ★ | Area claims without a ceiling height mean nothing | A cubic-metre figure, plus the height used to convert it | Up to 1000m³ ≈ 2,000–3,000 sq ft depending on ceiling | Published |
| 2. Is refill fragrance sold, at what price? | The machine is bought once, the oil forever | A listed size and price you can reach today | No separate Vaayu refill oil is sold today — ask SOSA | Weak |
| 3. Same oil as your other machines? | Wrong fluid can end a machine | A clear statement of which fluid goes where | No — cold-air oil is undiluted; Hotel Collection is water-based | Published |
| 4. Tank size and real consumption? | Consumption is a setting, not a fixed spec | A tank figure plus the setting the runtime assumes | 400ml · 90+ days a fill at mid intensity | Partial |
| 5. Warranty length and terms? | Decides what a fault costs you in year two | A stated period, in writing, with what it covers | Not a figure we publish — ask SOSA and get it in writing | Weak |
| 6. Spare parts — which, and available? | A pump or nozzle is the difference between repair and replacement | A named parts list and a lead time | Not published — ask SOSA before purchase | Weak |
| 7. Noise, in decibels? | A machine in a hall runs while people talk | A dB number, not "whisper quiet" | Under 38 dB | Published |
| 8. Power draw, in watts? | Lets you compute running cost yourself | Voltage and wattage, not "energy efficient" | DC 12V / 1A · 5W → 0.04 kWh a day at 8 hrs | Published |
| 9. Mounting, and does install cost extra? | An HVAC unit needs someone to fit it | Mount options, weight, and a clear install price or none | Freestanding or wall / HVAC mount · 0.9 kg. Install service: ask SOSA | Partial |
| 10. Certification? | Electrical safety and materials compliance | Named certificates, checkable | CE · RoHS · SGS | Published |
| 11. Controls — and does it work without the app? | An app-only machine is a machine that can be orphaned | Onboard controls confirmed, plus the app platforms | Bluetooth app plus onboard buttons, timers, key-lock. Platforms: ask SOSA | Partial |
| 12. Returns once fragrance is opened? | Decides whether a wrong scent is a loss | A written policy that names the opened-fragrance case | Confirm with SOSA before ordering | Weak |
| The honest caveat: four Weak grades on our own product is not a comfortable thing to publish, and I have thought about whether to soften it. The reason it stands is that a buyer spending ₹11,999 deserves to know which parts of the picture are specification and which are not. The hardware answers — 1000m³, 400ml, under 38 dB, 5W, CE, RoHS, SGS, onboard controls, 0.9 kg, wall and HVAC mounting — are published and checkable against the product page. The commercial answers, warranty and spares and returns and refill supply, are questions to put to SOSA directly, and I would say the same about any seller in this category, most of whom simply do not raise them at all. | ||||
Shop this guide
What the twelve questions point at
The specification, in full₹11,999Shop → Water-based · for ultrasonics onlyfrom ₹299Shop → Supply question already settled₹1,899Shop →
The SOSA principle
You are not buying a machine. You are buying a supply chain with a machine attached.
Hardware fails rarely and is replaceable. Fragrance runs out on schedule, every quarter, for as long as you own the thing — which is why question two decides more than questions one, seven and ten put together.
Part three — the four we answer badly, said plainly
Start with the one that matters most. There is no separate refill oil for the Vaayu on our store today. You buy the machine at ₹11,999, it arrives with four Hotel Collection cold-air fragrances at 100ml each, and the specification says a 400ml fill runs 90+ days at a mid intensity setting. What happens after the 400ml is a conversation to have with us rather than a page you can add to a cart. I will not quote a price for something we do not sell, I will not point you at the water-based line as a substitute, and I would ask you to be suspicious of anyone — including any comparison article about our own product — that does either. If uninterrupted supply is important to your building, ask SOSA where that stands before you order, and consider the Sukoon at ₹1,899, whose fragrance is listed at 15ml ₹299, 100ml ₹999 and 300ml ₹1,799, or the reed line, whose oil-only refills are ₹2,399 for 300ml and ₹3,499 for 500ml.
The other three are shorter but they are the same kind of gap. Warranty length is not something I can state here, and a number invented in a blog post is worse than no number at all — ask SOSA and keep the reply. Spare-part availability is the same: for a machine with a pump and a nozzle, the honest question is whether a serviceable part can be obtained in year three, and you should have that answered before rather than after. And the returns position once fragrance has been opened is a policy question, not a specification, so it belongs in an email to us with your order number attached. On the app, I can tell you that the machine has onboard buttons and therefore does not depend on a phone to run — which is the part that protects you — but not which mobile platforms the app supports.
What I can do is the arithmetic that is genuinely computable, so that at least one line of your running cost is settled before you spend. The Vaayu draws 5W. At eight hours a day that is 5 × 8 = 40 watt-hours, or 0.04 kWh a day and roughly 1.2 kWh a month. Run continuously it is 5 × 24 = 120 watt-hours, 0.12 kWh a day and about 3.6 kWh a month. Multiply either by your own per-unit tariff to get rupees; tariffs differ by state and by slab, and I am not going to quote you a bill. The point of showing the sum rather than a figure is that electricity is the one running cost of this machine that is small, knowable and yours to calculate — which makes it a useful contrast with the one that is not.
A specification you can check is worth more than a promise you cannot. Ask for the numbers, and notice which questions go unanswered.
— Sonal Sahani, SOSA
Part four — red flags, and what to do about each
Patterns worth recognising in a seller's reply, whoever the seller is. The right-hand column is the safer purchase if the answer does not satisfy you, priced from our own listings.
The red-flag table
What a bad answer usually means
| The red flag | What it usually means | What to do | Safer purchase |
|---|---|---|---|
| A square-footage claim with no ceiling height ★ | The number was converted, or invented | Ask for cubic metres and divide by your own height | Any machine whose volume rating is published |
| No refill listed anywhere on the site | The fragrance supply is not a product yet | Ask in writing; treat the in-box quantity as the budget | Sukoon ₹1,899 + Hotel Collection from ₹299 |
| "Our oil works in all our machines" | Water-based and undiluted lines are being blurred | Ask which fluid is which, and never mix them | Reed diffusers from ₹749, where there is only one fluid |
| "Whisper quiet" with no dB figure | Nobody measured it | Ask for the number; under 40 dB is a real claim | A machine publishing dB — the Vaayu states under 38 dB |
| No wattage published | You cannot compute your own running cost | Ask for volts and watts, then do the kWh sum yourself | Vaayu 5W → 0.04 kWh/day at 8 hrs · ₹11,999 |
| Warranty described but not written down | Nothing to hold anyone to in month fourteen | Get it in an email before paying | Ask SOSA — we do not publish a period here |
| A big tank sold as bigger coverage | Runtime is being passed off as reach | Check the coverage figure separately from the tank | Megh 6L ₹3,499 covers ~215 sq ft — less than the ₹1,899 Sukoon |
| Any claim about ratings, bookings, sales or health | There is no evidence for any of it | Discount the claim entirely and re-read the specification | Buy on coverage, control and supply only |
Honest notes for buyers: the electricity figures on this page are arithmetic on the published 5W draw — 5W × 8 hrs = 40Wh = 0.04 kWh a day ≈ 1.2 kWh a month; 5W × 24 hrs = 120Wh = 0.12 kWh a day ≈ 3.6 kWh a month — and must be multiplied by your own per-unit tariff, which varies by state and slab. No electricity bill is being quoted. Coverage conversions use 1m² ≈ 10.76 sq ft, so 1000m³ ÷ 3m ≈ 333m² ≈ 3,585 sq ft and 1000m³ ÷ 4.5m ≈ 222m² ≈ 2,390 sq ft. Coverage, tank and runtime figures are manufacturer specifications and vary with intensity setting, run hours, ceiling height, ventilation and season. SOSA does not currently sell a separate Vaayu refill oil; the 400ml in the box is today's whole supply, and buyers who need long-term availability should confirm the current position with SOSA before purchasing. The cold-air oil is a different product from the water-based Hotel Collection for ultrasonic machines, despite shared scent names, and neither is reed diffuser oil. Warranty length, AMC, spare parts, installation service, bulk or corporate terms, returns policy and app platform are not stated here because we cannot verify them in this format — ask SOSA directly and keep the reply. No health, wellness, air-purification or odour-removal claim is made, and no claim is made that scenting affects ratings, reviews, bookings, occupancy or revenue. Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
What a settled fragrance supply looks like
SOSA Hotel Collection · water-based, for ultrasonic machines ₹299 / 15ml
This is the line that answers question two properly, and it is worth showing precisely because it is not a Vaayu refill. It is water-based fragrance for the tank of a Sukoon, Boond or Megh, listed in three sizes at 15ml ₹299, 100ml ₹999 and 300ml ₹1,799 — a price per millilitre you can compute and plan around. If the supply question is the one that decides your purchase, this is the part of our range where it already has a boring, complete answer, and there is no shame in choosing a smaller machine for that reason.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
Writing a buyer-protection page about a category you sell in is an awkward exercise, because the honest version necessarily includes your own weak spots. I went back and forth on the four Weak grades in the table above. The argument for leaving them out is that no other seller publishes theirs. The argument for leaving them in is that a customer who finds out later feels tricked, and a customer who was told upfront feels respected — and only one of those two writes to us again.
The refill one is the gap I feel most. We built a good machine and we have not yet built the supply around it, and 400 millilitres is a generous quantity to ship in a box but it is not a permanent answer. I would rather say that on our own blog, in a table, with a grade next to it, than let a buyer assume that a ₹999 bottle of water-based Hotel Collection will do the job. It will not, and putting it in a cold-air machine is not a small mistake.
So here is what I would actually ask of you. Take these twelve questions and send them to three sellers, not one. Read which questions get answered with numbers and which get answered with adjectives. Then buy from whoever answers most of them in writing — even if that is not us. A well-informed customer in this category is worth more to a small brand than a quick sale, because the well-informed ones stay. Everything we make is composed and handmade in small batches in Pune, and a part of every order funds a girl's classroom through Nanhi Kali.
Frequently asked questions
What should I ask before buying a large-space scent diffuser?
Twelve things, in writing: the basis of the coverage figure, whether refill fragrance is sold and at what price, whether that fragrance is the same as the seller's other machines take, tank size and realistic consumption, warranty, spare parts, noise in dB, power draw in watts, mounting and whether installation costs extra, certification, what the controls are and whether it runs without the app, and the returns policy once fragrance is opened.
How can I tell if a coverage claim is honest?
Ask whether the number is a volume or an area, and at what ceiling height. Volume is the real quantity — the Vaayu is rated up to 1000m³ — and any square-footage figure is a conversion. 1000m³ ÷ 3m ≈ 333m² ≈ 3,585 sq ft, but 1000m³ ÷ 4.5m ≈ 222m² ≈ 2,390 sq ft. A seller who cannot give you a cubic-metre figure has not measured the thing they are selling.
Can I buy refill oil for a SOSA Vaayu?
Not as a separate product today. The machine ships with four Hotel Collection cold-air fragrances at 100ml each — 400ml in total, specified at 90+ days per fill at a mid intensity setting — and that is the whole supply currently available from us. The water-based Hotel Collection for ultrasonic machines is a different product and is not a substitute. Ask SOSA about current availability before you buy.
How much electricity does a cold-air scent diffuser use?
Very little, and you can compute it yourself from the published draw. The Vaayu is DC 12V / 1A at 5W. At eight hours a day: 5W × 8 = 40Wh = 0.04 kWh a day, roughly 1.2 kWh a month. Running continuously: 5W × 24 = 120Wh = 0.12 kWh a day, about 3.6 kWh a month. Multiply by your own per-unit tariff — rates vary by state and slab, so no bill figure is quoted here.
What warranty does the SOSA Vaayu come with?
That is not a figure we can state on this page, and I would rather write that than invent a period. The same applies to spare-part availability, installation service, bulk or corporate terms and the returns position once fragrance has been opened. Ask SOSA directly before ordering and keep the written reply. What is published and checkable is the hardware specification: up to 1000m³, 400ml, under 38 dB, 5W, 0.9 kg, wall and HVAC mountable, CE, RoHS and SGS certified.
Buyer protection · 2026
Send the twelve questions to three sellers — and buy from whoever answers in numbers rather than adjectives
Vaayu ₹11,999: up to 1000m³, 400ml tank at 90+ days a fill, 1h/4h/8h/24h timers with key-lock, under 38 dB, DC 12V/1A at 5W, 0.9 kg, freestanding or wall and HVAC mounted, CE, RoHS and SGS certified, four 100ml fragrances in the box — and no separate refill oil sold today, so ask us first. Sukoon ₹1,899 for 270–320 sq ft, with Hotel Collection fragrance listed at 15ml ₹299, 100ml ₹999 and 300ml ₹1,799. Free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
See the full specification → Sukoon ₹1,899
Continue the read
Before you spend ₹11,999
- Who doesn't need a SOSA Vaayu? — eight buyers redirected to something cheaper that works.
- What size space makes a cold-air diffuser worth buying? — the volume threshold, and how to measure yours.
- The monthly running cost of a Vaayu and is a cold-air diffuser expensive to maintain? — the two cost pages.
- Is a Vaayu right for my home, villa, Airbnb or business? — four contexts, four different answers.
- 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 buyer-protection checklist for large-space scent machines, applied to SOSA's own product including the questions we cannot currently answer well. Hardware figures quoted for the SOSA Vaayu are manufacturer specifications from the live product page and are checkable there. Electricity figures are arithmetic on the published 5W draw (5W × 8 hrs = 0.04 kWh a day ≈ 1.2 kWh a month; 5W × 24 hrs = 0.12 kWh a day ≈ 3.6 kWh a month) and must be multiplied by the reader's own per-unit tariff; tariffs vary by state and slab and no bill amount is quoted. Coverage conversions use 1 square metre ≈ 10.76 square feet. Warranty length, AMC, spare-part availability, installation service, bulk or corporate terms, returns policy and app platform are deliberately not stated as facts anywhere in this article because they are not figures SOSA publishes — readers are directed to ask SOSA and retain the written reply. No health, wellness, air-purification or odour-removal claim is made or implied, and no claim is made that scenting affects ratings, reviews, bookings, occupancy or revenue.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.