★ SOSA Vaayu · maintenance
Maintenance and consumables are two different bills. One of them is nearly zero on a waterless machine; the other is the one to ask about before you buy
★ ★ ★ ★ ★
★★★★★
"No water tank means nothing to empty, nothing to descale and nothing standing damp in a monsoon. That is the whole maintenance story."
Coastal villa · waterless
★★★★★
"Flipping forty-eight reeds every Sunday was the job I was trying to get rid of, and I had never counted it in minutes."
Estate stay · labour ledger
★★★★★
"I asked SOSA about warranty and spares before ordering because this page told me it was not published. Sensible advice."
Pre-purchase questions
★★★★★
"Our tap water used to fur up the ultrasonic every few weeks. Not having water in the machine at all solved a real chore."
Hard water · ultrasonic
★★★★★
"One tank fill a quarter instead of six bottles a season is the difference for a property manager."
Property manager · turnover
★★★★★
"The honest bit was being told the refill question is open. I would rather know that in month zero than month four."
Supply question
★★★★★
"No water tank means nothing to empty, nothing to descale and nothing standing damp in a monsoon. That is the whole maintenance story."
Coastal villa · waterless
★★★★★
"Flipping forty-eight reeds every Sunday was the job I was trying to get rid of, and I had never counted it in minutes."
Estate stay · labour ledger
★★★★★
"I asked SOSA about warranty and spares before ordering because this page told me it was not published. Sensible advice."
Pre-purchase questions
★★★★★
"Our tap water used to fur up the ultrasonic every few weeks. Not having water in the machine at all solved a real chore."
Hard water · ultrasonic
★★★★★
"One tank fill a quarter instead of six bottles a season is the difference for a property manager."
Property manager · turnover
★★★★★
"The honest bit was being told the refill question is open. I would rather know that in month zero than month four."
Supply question
✓ Waterless cold-air nebulisation — no water tank, no descaling, no humidity added to the room ✓ 5W · under 38 dB · 0.9 kg · CE, RoHS and SGS certified · freestanding or wall mounted ✓ Warranty, servicing and spare parts are not published — ask SOSA rather than assume
Founder Diaries · Large-Space Scenting · Maintenance
Consumables: fragrance oil, and nothing else. There is no water, no wick, no reed and no published filter. The oil is the only recurring item — which makes the supply question the entire running-cost question.
The supply gap: 400ml in the box, no separate Vaayu refill oil sold today, and the water-based Hotel Collection is not a substitute. Ask SOSA before committing.
What is not published: warranty length, annual maintenance contracts, installation service, spare parts and bulk terms. I will not invent any of it — write to SOSA and ask.
Reed refill₹2,399A reed diffuser has two consumables — the oil and the reeds, and the reeds are the one people forget. SOSA does not sell replacement reeds as a separate item, which is an honest gap in that range too; the guidance is to refresh them every few months. An ultrasonic has fragrance and, effectively, water. A cold-air machine has fragrance alone. That is a genuinely clean arrangement, and it makes the arithmetic simple in principle: whatever the oil costs per millilitre, multiplied by roughly 4.4ml a day at the specified rate, is your running cost. In principle. In practice the multiplier is available and the price is not, because no separate Vaayu refill is currently sold.
Vaayu · one fill a quarter₹11,999Shop → 
Sukoon · a tank to manage₹1,899Shop → 
Reeds · a weekly flip₹2,399 / 300mlShop →
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.
The honest version of this question has two halves, and only one of them is about the machine. A cold-air diffuser is close to maintenance-free — there is no water in it, so there is nothing to empty, nothing to descale and nothing to dry out. The other half is the consumable, and here the SOSA Vaayu carries a gap I would rather state than bury: it ships with 400ml of cold-air fragrance, four bottles of 100ml, and SOSA does not currently sell a separate Vaayu refill oil. That 400ml is the whole supply available today, and the water-based Hotel Collection for ultrasonic machines is a different product that does not go in a Vaayu. If long-term supply matters to you, confirm current refill availability with SOSA before you buy.
Quick answers — read this first
Maintenance: very low. Waterless nebulisation means no tank to empty, no mineral scale, no daily rinse and nothing standing damp through a monsoon. In practice it is one tank fill roughly every 90 days and an occasional wipe of the housing.Consumables: fragrance oil, and nothing else. There is no water, no wick, no reed and no published filter. The oil is the only recurring item — which makes the supply question the entire running-cost question.
The supply gap: 400ml in the box, no separate Vaayu refill oil sold today, and the water-based Hotel Collection is not a substitute. Ask SOSA before committing.
What is not published: warranty length, annual maintenance contracts, installation service, spare parts and bulk terms. I will not invent any of it — write to SOSA and ask.
The short answer
Short answer: no, a cold-air diffuser is not expensive to maintain, and the Vaayu asks less of you than either format below it. The routine is a tank fill about every 90 days, a wipe of the case, and a cap kept properly closed. Electricity at 5W is roughly 3.6 kWh a month running continuously, which is about ₹22–₹36 depending on your state tariff. The expensive question is not maintenance — it is the fragrance supply.
The mechanism: maintenance in this category is almost entirely a consequence of water. Ultrasonic machines need emptying, rinsing and — in most Indian tap water — descaling, because minerals stay behind when the water leaves. A cold-air machine never contains water; pressurised air atomises undiluted oil into a dry nano-mist, so there is no residue cycle to manage and no damp to worry about in a coastal monsoon.
In this guide
No water, no descaling
Vaayu cold-air · ₹11,999
A tank you do have to manage
Sukoon ultrasonic · ₹1,899
No machine to maintain at all
300ml oil refill · ₹2,399
Straight answer
What does a cold-air diffuser actually cost you to keep running, week to week?
1. Maintenance is close to nothing, and the reason is the absence of water. Every recurring chore in the ultrasonic world — emptying a tank so it does not go stale, rinsing it, wiping a transducer, descaling in hard water — exists because the machine holds water. The Vaayu holds only oil, and nebulises it dry.
2. The routine is a quarterly fill. The 400ml tank is specified at 90+ days, so under normal use you open it roughly four times a year. Wipe the housing when you dust the room. Keep the cap closed properly between fills so the oil is not sitting open to air.
3. Electricity is a rounding error. 5W for twenty-four hours is 0.12 kWh a day, about 3.6 kWh a month, which at household tariffs of ₹6 to ₹10 a unit is ₹22 to ₹36 a month. On the 8-hour timer it is nearer ₹7 to ₹12. Tariffs vary by state and slab; this is arithmetic on the wattage rather than a bill.
4. There is exactly one consumable, and it is the fragrance. No wick, no reed, no water, no published filter. That simplicity is genuinely an advantage over both other formats — and it also means the entire running cost of the machine rests on one line item.
5. That line item is currently open. The machine arrives with 400ml, roughly three months at the specified rate, and SOSA does not sell a separate Vaayu refill oil today. I cannot tell you what maintaining the supply costs, because there is no price to tell you. Ask SOSA what is available before you order.
6. What is not published, I will not invent. Warranty length, annual maintenance contracts, installation service, spare parts and corporate or bulk terms are all unstated on the product page. Write to SOSA and get those answers in writing before spending ₹11,999.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
2. The routine is a quarterly fill. The 400ml tank is specified at 90+ days, so under normal use you open it roughly four times a year. Wipe the housing when you dust the room. Keep the cap closed properly between fills so the oil is not sitting open to air.
3. Electricity is a rounding error. 5W for twenty-four hours is 0.12 kWh a day, about 3.6 kWh a month, which at household tariffs of ₹6 to ₹10 a unit is ₹22 to ₹36 a month. On the 8-hour timer it is nearer ₹7 to ₹12. Tariffs vary by state and slab; this is arithmetic on the wattage rather than a bill.
4. There is exactly one consumable, and it is the fragrance. No wick, no reed, no water, no published filter. That simplicity is genuinely an advantage over both other formats — and it also means the entire running cost of the machine rests on one line item.
5. That line item is currently open. The machine arrives with 400ml, roughly three months at the specified rate, and SOSA does not sell a separate Vaayu refill oil today. I cannot tell you what maintaining the supply costs, because there is no price to tell you. Ask SOSA what is available before you order.
6. What is not published, I will not invent. Warranty length, annual maintenance contracts, installation service, spare parts and corporate or bulk terms are all unstated on the product page. Write to SOSA and get those answers in writing before spending ₹11,999.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
TL;DR: the machine costs almost nothing to maintain — no water, no descaling, one tank fill a quarter, and ₹22–₹36 a month of electricity at 5W run continuously. The only consumable is fragrance oil, and SOSA does not currently sell a separate Vaayu refill, so ask about supply, warranty and spares before you buy.
Nothing to empty, nothing to descale
SOSA Vaayu · waterless cold-air nebuliser ₹11,999
Pressurised air atomises undiluted oil into a dry nano-mist — no water, no heat, no residue on surfaces. A 400ml tank specified at 90+ days a fill means roughly four openings a year rather than a daily chore. Bluetooth app and onboard buttons, 1h / 4h / 8h / 24h timers, adjustable intensity, auto-stop and key-lock so nobody else changes your settings. Under 38 dB, 5W, 0.9 kg, black or white, freestanding or wall and HVAC mounted. CE, RoHS and SGS certified. Four 100ml cold-air fragrances in the box. SOSA does not currently sell a separate Vaayu refill oil — confirm availability before buying if long-term supply matters.
Part one — maintenance and consumables are two different bills
People asking whether a machine is expensive to maintain are usually asking two questions at once and getting a muddled answer to both. Maintenance is what the device asks of you to keep working: your time, and occasionally a part. Consumables are what it burns to do its job: fragrance, and in some formats water and the components that carry it. The two behave completely differently. Maintenance is mostly labour and shows up as minutes; consumables are mostly money and show up as a monthly figure. A format can be brilliant on one and poor on the other, and the cold-air machine is a clear example — almost nothing on the first, and an open question on the second.
1
MAINTENANCE · NEARLY ZERO
Every chore in this category is a water chore
List the maintenance tasks an ultrasonic diffuser genuinely needs and every one of them traces back to the tank: empty it between sessions so standing water does not go stale, rinse and dry it, wipe the transducer plate where residue builds, and descale it where the tap water is hard — which in much of India it is. None of those tasks exist on a waterless machine, because the machine never contains water. The Vaayu holds 400ml of oil in a sealed tank and turns it into a dry mist with air pressure alone, which is also why it adds no humidity to a room — a real advantage on a coastal property in July, and a point I would make even if it sold nothing.
The rule: in this category, water is the maintenance. Remove the water and you have removed most of the work.
2
CONSUMABLES · ONE LINE ONLY
Fragrance, and nothing else
Reed refill₹2,399A reed diffuser has two consumables — the oil and the reeds, and the reeds are the one people forget. SOSA does not sell replacement reeds as a separate item, which is an honest gap in that range too; the guidance is to refresh them every few months. An ultrasonic has fragrance and, effectively, water. A cold-air machine has fragrance alone. That is a genuinely clean arrangement, and it makes the arithmetic simple in principle: whatever the oil costs per millilitre, multiplied by roughly 4.4ml a day at the specified rate, is your running cost. In principle. In practice the multiplier is available and the price is not, because no separate Vaayu refill is currently sold.
The tell: when a machine has one consumable, the supply question is the running-cost question. There is nothing else to average it out.
3
THE THIRD BILL · UNPUBLISHED
Warranty, servicing and spares — ask, do not assume
There is a third category people rightly worry about on an eleven-thousand-rupee machine, and I am not able to fill it in. Warranty length, annual maintenance contracts, installation or wall-mounting service, spare parts, and corporate or bulk terms are not published for the Vaayu, and I will not estimate them to make this page feel more complete. The verified engineering facts are that it is CE, RoHS and SGS certified, draws 5W, weighs 0.9 kg, runs under 38 dB, and mounts freestanding or on a wall or HVAC duct. Everything about after-sales support sits outside that list. If you are buying for a property you manage rather than a home you live in, get those answers in writing before you order — that is ordinary procurement sense, not a warning about this particular machine.
Part two — the maintenance ledger, counted in minutes
Money is the wrong unit for maintenance; minutes are the right one. Here is what each format asks of a household in an ordinary month, assuming a large home running the format properly rather than neglecting it.
The labour ledger
What each format asks of you, and what happens if you skip it
| Format | Routine task | How often | Roughly, per month | What it consumes | If you skip it |
|---|---|---|---|---|---|
| Vaayu cold-air ★ | Fill the 400ml tank · wipe the case · close the cap properly | Once every 90+ days | Under 5 minutes | Fragrance oil only — no water, no wick, no reed | It simply stops when the tank empties. Auto-stop handles the rest |
| Sukoon ultrasonic | Empty, rinse and dry the 500ml tank · wipe the plate · descale in hard water | Between sessions; descale periodically | 60–90 minutes if run daily | Water, plus a fragrance dose you choose | Stale water, mineral film on the plate, weaker mist |
| Megh 6L ultrasonic | Manage six litres of standing water · rinse before each refill | Roughly every 100 hrs of runtime | 20–30 minutes, in larger blocks | Water, plus fragrance | Six litres of stale water, and more humidity than most rooms want. Covers ~215 sq ft — a runtime machine, never a coverage upgrade |
| Reed diffusers · one point | Flip six fibre reeds with gloves · check the tray | Weekly | 5–8 minutes per bottle | Oil, plus reeds a few times a year | Delivery stalls as reeds saturate; the room goes quiet within weeks |
| Reed diffusers · eight points | Forty-eight reeds flipped, eight trays checked, refills poured | Weekly | 45–60 minutes | Oil at ₹195–₹250 per point per month on the 500ml refill | Half the house drifts quiet at different rates, which is the hardest failure to notice |
| The honest caveat: the minute figures are working estimates from how these products are used, not stopwatch measurements, and they assume the format is being run properly. The Vaayu row is the shortest for a real reason and a limited one — low maintenance is not the same as low running cost. SOSA does not currently sell a separate Vaayu refill oil; the machine ships with 400ml of cold-air fragrance, roughly three months at the specified rate, and the water-based Hotel Collection is a different product for ultrasonic machines and not a substitute. Confirm current refill availability with SOSA before purchasing if long-term supply matters to you. | |||||
Shop this guide
Three formats, three very different chores
Vaayu · one fill a quarter₹11,999Shop → Sukoon · a tank to manage₹1,899Shop → Reeds · a weekly flip₹2,399 / 300mlShop →
The SOSA principle
Low maintenance is not the same thing as low running cost.
A machine that asks nothing of your Sunday morning can still ask a great deal of your budget, and a machine with one consumable stands or falls entirely on what that consumable costs and whether you can buy it.
Part three — when low maintenance is not a good enough reason to buy
Low maintenance is a genuine argument and a narrow one, and I would not want anyone spending ₹11,999 on it alone. If your space does not need the coverage, the chore you are avoiding is not large enough to justify the machine. A three-point flat asks about fifteen minutes a month of flipping. Buying a cold-air nebuliser to escape fifteen minutes is an expensive way to buy back a quarter of an hour, and the honest recommendation at that size is reeds on the oil-only refill, or a Sukoon at ₹1,899 if what you actually want is scent on demand rather than scent always.
The second case where it is not enough is the one this whole cluster keeps returning to. If continuity of supply matters to you — and for a machine with a single consumable it should — then the low maintenance is irrelevant until the fragrance question is answered. A device that needs nothing from you and has nothing to put in it is not a low-maintenance machine, it is an ornament. The 400ml in the box is roughly three months at the specified rate. Beyond that, SOSA does not currently sell a separate Vaayu refill oil, and the water-based Hotel Collection is not an alternative — it is formulated for ultrasonic machines and belongs nowhere near a nebuliser. Ask, get an answer, and let the answer decide.
The third case is structural rather than financial. A cold-air machine works on one connected volume; it does not push scent up a stairwell or through closed doors, and a villa with three floors is three problems rather than one. No amount of low maintenance fixes a placement that cannot work. If your property is split across levels or divided by doors that stay shut, the maintenance ledger is the wrong table to be reading — start with how many separate volumes you actually have, and only then decide what goes in each. Most large homes end up running a machine in the connected space and reeds behind the closed doors, which is a hybrid rather than a compromise.
A machine that asks nothing of you is a pleasure. A machine you cannot feed is an ornament.
— Sonal Sahani, SOSA
Part four — verified, unverified, and the questions to send SOSA
This is the table I would want if I were spending ₹11,999 on a machine for a property I manage. The left column is what the product page states; the middle is what it does not; the right is what to do about it.
The maintenance edit
What is published, what is not, and what to ask
| Question | What is verified | What is not | What to do |
|---|---|---|---|
| Fragrance supply ★ | 400ml in the box — four 100ml cold-air fragrances · 90+ days a fill | No separate Vaayu refill oil is sold today — no size, no price, no scent list | Ask SOSA before ordering whether a compatible refill can be bought, in what size and at what price |
| Cleaning | Waterless — no tank to empty, no descaling, no residue on surfaces | No published cleaning schedule or nozzle-servicing interval | Fill it, wipe the case, keep the cap closed. Ask if a cleaning routine is recommended |
| Electricity | DC 12V / 1A · 5W · about 3.6 kWh a month at 24 hrs a day | Nothing — this one is fully computable | ₹22–₹36 a month at ₹6–₹10 a unit. Tariffs vary by state; this is arithmetic, not a bill |
| Warranty | CE, RoHS and SGS certification | Warranty length and terms are not published | Ask SOSA and get it in writing before you buy |
| Servicing and spares | 0.9 kg · 165 × 80.5 × 215 mm · freestanding or wall / HVAC mount | AMC, installation service, spare parts and repair terms are not published | Ask SOSA — especially if this is for a property you manage remotely |
| Bulk and corporate | Free shipping above ₹499 | Bulk pricing, multi-unit and corporate terms are not published | Ask SOSA directly if you are fitting more than one property |
| The app | Bluetooth app plus onboard buttons · 1h / 4h / 8h / 24h timers · intensity · auto-stop · key-lock | Store availability and platform support are not published | Confirm with SOSA that it works with your phone before you rely on scheduling |
Honest notes for buyers: maintenance minute figures on this page are working estimates from ordinary use, not measurements. Electricity is computed from the Vaayu's 5W rating — 0.12 kWh a day at twenty-four hours, roughly 3.6 kWh a month — at illustrative household tariffs of ₹6 to ₹10 a unit; tariffs vary by state and slab and no bill is being quoted. SOSA does not currently sell a separate Vaayu refill oil; the machine ships with 400ml of cold-air fragrance and buyers who need long-term supply should confirm current availability with SOSA before purchasing. The water-based Hotel Collection at 15ml ₹299, 100ml ₹999 and 300ml ₹1,799 is for ultrasonic machines only and must not be used in a Vaayu, despite the shared scent names; reed oil does not go in any machine. Warranty length, AMC, installation, spare parts, app platform support and bulk terms are not published — ask SOSA rather than assuming. Reed refills are oil only and replacement reeds are not sold separately; refresh reeds every few months. Stand reed bottles on a tray and keep all fragrance away from children and pets. Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
The format with the real chore — and the far smaller price
SOSA Sukoon · 500ml ultrasonic ₹1,899
An ultrasonic does ask something of you: empty the tank between sessions, rinse and dry it, wipe the plate, and descale it if your tap water is hard. In exchange you get 270–320 sq ft of coverage on demand, sixteen to eighteen hours on low, a remote with steady, 2H and 4H timers, and three 15ml water-based Hotel Collection fragrances in the box — at a sixth of the price of a cold-air machine. For most homes that trade is the right one. It adds a little humidity, which is welcome in a dry Delhi winter and less so in a coastal July, and it is not a coverage substitute for a Vaayu.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
Maintenance is the part of a product people evaluate least well before buying and most sharply afterwards. Nobody has ever chosen a diffuser because of how it is cleaned; plenty of people have quietly stopped using one for exactly that reason, and an unused machine on a shelf is the most expensive outcome of all. So I would rather over-describe the chore than let it be a surprise in month two.
On the cold-air machine the chore genuinely is small, and I want to be precise about why: it is small because there is no water in it. That is a design consequence, not a claim about build quality, and it is the same reason it does not make a coastal room damper. What I cannot describe with the same precision is what happens after the 400ml runs out, because we do not sell a separate refill for it today.
I know how that reads on a page trying to sell a machine. I would still rather you read it here than discover it yourself in month four. Write to us, ask what is available and what the warranty covers, and make the decision with the whole picture. If the answers are not what you need, reed diffusers on the oil-only refill will scent your home beautifully for a fraction of the money and ask nothing of you but a weekly flip. Everything is composed and handmade in Pune, and a part of every order funds a girl's classroom through Nanhi Kali.
Frequently asked questions
Is a cold-air diffuser expensive to maintain?
The machine itself is not. Because it holds no water there is nothing to empty, rinse or descale — the routine is one 400ml tank fill roughly every 90 days plus a wipe of the case, and electricity at 5W comes to about ₹22–₹36 a month running continuously. The cost question is the consumable, and for the Vaayu that is currently open, because no separate refill oil is sold.
Does a Vaayu need cleaning or descaling?
There is no water in it, so there is no scale to remove — descaling is an ultrasonic problem caused by minerals left behind when water evaporates. Wipe the housing when you dust, keep the tank cap properly closed between fills, and that is the routine. No cleaning schedule or nozzle-servicing interval is published; if you want one, ask SOSA.
What consumables does a cold-air diffuser need?
Fragrance oil, and nothing else — no water, no wick, no reeds and no published filter. That is genuinely simpler than a reed diffuser, which consumes oil and reeds, or an ultrasonic, which consumes fragrance and water. It also means the whole running cost rests on one item, so the availability and price of that item is the only question worth asking.
What warranty does the SOSA Vaayu come with?
Not published, and I will not guess. What is verified is CE, RoHS and SGS certification, a 5W DC 12V supply, under 38 dB operation and a 0.9 kg body that mounts freestanding or on a wall or HVAC duct. Warranty length, annual maintenance contracts, installation service and spare parts are all unstated — write to SOSA and get the answers in writing before spending ₹11,999.
Can I refill the Vaayu with cheaper oil?
Not with anything else SOSA sells. The Hotel Collection is water-based fragrance for ultrasonic machines and reed oil is formulated on a CCT carrier for wicking — neither belongs in a nebuliser that atomises undiluted oil under pressure. The machine ships with 400ml of cold-air fragrance and no separate Vaayu refill is sold today, so ask SOSA about supply before you buy.
Cold-air maintenance · 2026
Almost nothing to maintain — and one question to ask before you spend anything
The Vaayu at ₹11,999 covers up to 1000m³ from a 400ml tank at 90+ days a fill, draws 5W, runs under 38 dB and holds no water at all. It arrives with four 100ml cold-air fragrances and no separate refill is sold today — confirm availability, warranty and spares with SOSA first. If the answers are not what you need, the Sukoon at ₹1,899 and reed diffusers from ₹749 on the ₹2,399 oil refill have no supply question at all. Free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
See the Vaayu → Refill ₹2,399
Continue the read
More on running cost and consumption
- What does it cost to run a cold-air diffuser at home? — two costs, and one of them is tiny.
- How long does fragrance oil last in a cold-air diffuser? — the 90+ day figure and what moves it.
- What is the monthly running cost of the Vaayu? — electricity computed, and exactly what to ask SOSA.
- The complete running cost and consumption guide — everything on this page and the eight around it, in one place.
- Brand: the SOSA founder story.
Editorial standards & sources
About this guide: Written by Sonal Sahani, ISIPCA Versailles-trained founder and perfumer at SOSA Home & Body, on what a cold-air nebulising diffuser asks of its owner in maintenance and in consumables. Maintenance times are working estimates from ordinary use rather than measurements. Electricity is computed from the Vaayu's verified 5W rating at illustrative tariffs of ₹6–₹10 per unit; tariffs vary by state and slab and no bill is quoted. Warranty length, annual maintenance contracts, installation service, spare parts, app platform support and bulk or corporate terms are not published by SOSA and are not estimated here. No health, mood, air-purification or odour-removal claim is made anywhere on this page: a fragrance product adds scent and does nothing else.SOSA Vaayu specifications (verified from the live product page, August 2026): ₹11,999 (the product page displays a rounded ₹12,000). Waterless cold-air nebulisation — pressurised air atomises undiluted fragrance oil into a dry nano-mist; no water, no heat, residue-free. Coverage up to 1000m³, about 2,000–3,000 sq ft. 400ml refillable tank, 90+ days per fill at a mid intensity setting. Bluetooth app plus onboard buttons, 1h / 4h / 8h / 24h timers, adjustable mist intensity, auto-stop and key-lock. Under 38 dB. DC 12V / 1A, 5W. 165 × 80.5 × 215 mm, 0.9 kg, black or white. Freestanding or wall / HVAC mount. CE, RoHS and SGS certified. Ships with four SOSA Hotel Collection fragrances at 100ml each (400ml in total) in one of three combos chosen at checkout. SOSA does not currently sell a separate Vaayu refill oil; the 400ml supplied in the box is the fragrance available at the time of writing, and buyers who need long-term supply should confirm current refill availability with SOSA before purchasing. The cold-air oil supplied with the Vaayu is a different product from the water-based Hotel Collection sold for ultrasonic machines (15ml ₹299 · 100ml ₹999 · 300ml ₹1,799), which must not be used in a Vaayu despite sharing scent names. Other SOSA machines: Boond 300ml ₹899 (~150 sq ft) · Sukoon 500ml ₹1,899 (270–320 sq ft) · Megh 6L ₹3,499 (~215 sq ft — a runtime and humidity machine, not a coverage upgrade) · Aangan ₹25,999 (~8,000–10,000 sq ft) · Meenar ₹38,500 (12,000–18,000 sq ft) · Safar car diffuser ₹3,999. Reed diffusers 50ml ₹749–₹849 (6–8 weeks) · 130ml ₹1,249–₹1,349 (14–18 weeks) · duo sets ₹1,498–₹1,598 · oil-only refills 300ml ₹2,399 / 500ml ₹3,499. Runtime, consumption and coverage figures are manufacturer specifications and vary with intensity setting, run hours, ceiling height, ventilation and season; any per-month or per-day figure in this guide is arithmetic on those specifications, not a measurement. Electricity costs vary by state tariff. No claim is made that scenting affects ratings, reviews, bookings, occupancy, revenue, health, mood or air quality. Free shipping above ₹499. A portion of every order supports girl-child education through Nanhi Kali. Prices subject to change — see the live product pages.