★ SOSA Vaayu · what it costs to run
A cold-air diffuser costs a few rupees a month in electricity — the honest question is what the fragrance costs, and today that answer is incomplete
★ ★ ★ ★ ★
★★★★★
"I wanted a running-cost number before I spent twelve thousand rupees. This is the only page that gave me arithmetic instead of adjectives."
Villa owner · 2,400 sq ft
★★★★★
"The refill position is stated three times on this page. I rang SOSA, got a straight answer, and bought knowing exactly where I stood."
Vaayu ₹11,999
★★★★★
"Five watts. I had assumed a machine like this would show up on my bill and it simply does not."
Boutique homestay owner
★★★★★
"We run three properties. Knowing that electricity is under thirty rupees a month each let me stop worrying about the wrong number."
Three-property host
★★★★★
"I costed my reed diffusers per day after reading this and was genuinely surprised. Useful for both formats, not just the expensive one."
Reeds + Sukoon
★★★★★
"Told me plainly that the fragrance cost after the first tank is an open question. That honesty is why I bought from SOSA."
Villa · open ground floor
★★★★★
"I wanted a running-cost number before I spent twelve thousand rupees. This is the only page that gave me arithmetic instead of adjectives."
Villa owner · 2,400 sq ft
★★★★★
"The refill position is stated three times on this page. I rang SOSA, got a straight answer, and bought knowing exactly where I stood."
Vaayu ₹11,999
★★★★★
"Five watts. I had assumed a machine like this would show up on my bill and it simply does not."
Boutique homestay owner
★★★★★
"We run three properties. Knowing that electricity is under thirty rupees a month each let me stop worrying about the wrong number."
Three-property host
★★★★★
"I costed my reed diffusers per day after reading this and was genuinely surprised. Useful for both formats, not just the expensive one."
Reeds + Sukoon
★★★★★
"Told me plainly that the fragrance cost after the first tank is an open question. That honesty is why I bought from SOSA."
Villa · open ground floor
✓ Vaayu · DC 12V / 1A · 5W · 400ml tank · 90+ days a fill · under 38 dB ✓ Electricity figures on this page are arithmetic on 5W — tariffs vary by state ✓ No separate Vaayu refill oil is sold today — confirm with SOSA before you buy
Founder Diaries · Large-Space Scenting · Running Cost
Fragrance: the honest, incomplete answer. The box holds 400ml rated at 90+ days a fill. No separate Vaayu refill oil is sold at the time of writing, so there is no per-millilitre price to quote and I will not invent one.
Do not substitute: the water-based Hotel Collection for ultrasonic machines is a different product and must not go in a Vaayu, despite sharing scent names.
For comparison: a SOSA reed diffuser runs at roughly ₹15–₹20 a day on a 50ml bottle, or about ₹7–₹9 a day on the 300ml oil refill — and uses no electricity at all.
Reed oil refill₹2,399 · reeds onlyAcross every format we sell, the oil is what you actually spend money on over years. Take our reed range, where I can show you the whole arithmetic because every price is published. A 50ml Mountain Breeze at ₹849 lasts six to eight weeks — that is 42 to 56 days, so ₹15 to ₹20 a day. The 130ml at ₹1,349 lasts 14–18 weeks, or 98 to 126 days, which works out at ₹11 to ₹14 a day. The 300ml oil refill at ₹2,399 keeps a vessel running roughly eight to eleven months, which is ₹7 to ₹10 a day. Note what happens across those three lines: the machine — in this case a glass bottle and six reeds — is nearly free, and the fragrance is the entire cost. The same shape holds for an electric machine. That refill is for reed diffusers only and does not go in any machine.
Vaayu · 5W, 400ml in the box₹11,999Shop → 
Sukoon · one room, priced consumable₹1,899Shop → 
Mountain Breeze · no electricity at allfrom ₹849Shop →
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 cold-air scent diffuser has exactly two running costs, and they are wildly different in size. One is electricity, which is small enough to compute on the back of an envelope and then largely forget. The other is fragrance, which is the real cost of owning any scenting machine — and in the case of the SOSA Vaayu at ₹11,999 I have to tell you something before we go any further. SOSA does not currently sell a separate Vaayu refill oil. The machine ships with 400ml — four SOSA Hotel Collection cold-air fragrances at 100ml each — and that is the entire fragrance supply available today. If long-term supply matters to you, ask SOSA where refill availability stands before you spend, not after.
Quick answers — read this first
Electricity: the Vaayu is rated DC 12V / 1A at 5W. Run 24 hours a day that is 0.12 kWh a day, about 3.6 kWh a month — roughly ₹22 to ₹36 a month depending on your state tariff. This is arithmetic on the rated figure, not a bill.Fragrance: the honest, incomplete answer. The box holds 400ml rated at 90+ days a fill. No separate Vaayu refill oil is sold at the time of writing, so there is no per-millilitre price to quote and I will not invent one.
Do not substitute: the water-based Hotel Collection for ultrasonic machines is a different product and must not go in a Vaayu, despite sharing scent names.
For comparison: a SOSA reed diffuser runs at roughly ₹15–₹20 a day on a 50ml bottle, or about ₹7–₹9 a day on the 300ml oil refill — and uses no electricity at all.
The short answer
Short answer: the electricity cost of running a cold-air scent diffuser at home is negligible — on the Vaayu's rated 5W, somewhere between about ₹5 and ₹36 a month depending on how many hours a day you run it and what your state charges per unit. The fragrance is the cost that matters, and for the Vaayu today that cost is bounded by what is in the box: 400ml, rated at 90+ days per fill, with no separate refill oil currently on sale.
The mechanism, and why the power draw is so low: cold-air nebulisation uses a small pump to atomise undiluted oil into a dry nano-mist. There is no heater and no ultrasonic plate boiling water — the two things that make other fragrance appliances draw real current. A 5W device is in the same class as a phone charger left plugged in, and it does not meaningfully move a domestic bill.
Shop: Vaayu ₹11,999, up to 1000m³, 400ml tank, 1h / 4h / 8h / 24h timers, adjustable intensity, under 38 dB, 5W · Sukoon ₹1,899 for one normal room · reed diffusers from ₹749, no electricity at all. Free shipping above ₹499.
In this guide
5W · under 38 dB
Vaayu cold-air · ₹11,999
If one room is the job
Sukoon 500ml · ₹1,899
Cheapest running cost we sell
Reed oil refill · ₹2,399
Straight answer
What does it actually cost to run a cold-air scent diffuser at home?
1. Electricity: a few rupees a month, and I can show you the sum. The Vaayu is rated at 5W. Five watts for twenty-four hours is 120 watt-hours, or 0.12 kWh a day. Over thirty days that is 3.6 kWh. Multiply by whatever your state charges per unit — at ₹6 that is ₹21.60 a month, at ₹8 it is ₹28.80, at ₹10 it is ₹36. Tariffs vary considerably by state and by slab, and I am not quoting anyone's bill.
2. Run it eight hours a day instead and it is trivial. 5W × 8 hours is 40 watt-hours a day, 1.2 kWh a month, roughly ₹7 to ₹12 a month. Over a whole year at eight hours a day you are looking at about 14.6 kWh — under ₹120 at ₹8 a unit.
3. Fragrance is the real running cost of any scenting machine. In every category — reeds, ultrasonic, cold-air — the consumable outspends the electricity by a wide margin over the life of the device. That is the number to interrogate before you buy.
4. And here is the honest position on that number. SOSA does not currently sell a separate refill oil for the Vaayu. The machine ships with 400ml of cold-air fragrance — four Hotel Collection scents at 100ml each, in one of three combos chosen at checkout — rated at 90+ days per fill. That is the supply available today. There is no refill price for me to quote, and I am not going to estimate one.
5. Do not plan on a substitute. The water-based Hotel Collection sold at ₹299, ₹999 and ₹1,799 is built for ultrasonic machines. It shares scent names with the cold-air oils and it is not the same product; it does not go in a Vaayu.
6. Ask before you spend. If you need a scent running continuously for years, ring or write to SOSA and ask where Vaayu refill availability stands on the day you are buying. If the answer does not suit your horizon, buy something else — a Sukoon at ₹1,899 has a fully priced consumable behind it.
7. There are no other running costs I can verify. The Vaayu is waterless, so there is no descaling and no water to change. Whether there are consumable filters, service intervals, an AMC or a warranty period is not something I can state here — ask SOSA rather than trusting a number you read anywhere.
Made in India, CE / RoHS / SGS certified, and a portion of every order supports girl-child education through Nanhi Kali.
2. Run it eight hours a day instead and it is trivial. 5W × 8 hours is 40 watt-hours a day, 1.2 kWh a month, roughly ₹7 to ₹12 a month. Over a whole year at eight hours a day you are looking at about 14.6 kWh — under ₹120 at ₹8 a unit.
3. Fragrance is the real running cost of any scenting machine. In every category — reeds, ultrasonic, cold-air — the consumable outspends the electricity by a wide margin over the life of the device. That is the number to interrogate before you buy.
4. And here is the honest position on that number. SOSA does not currently sell a separate refill oil for the Vaayu. The machine ships with 400ml of cold-air fragrance — four Hotel Collection scents at 100ml each, in one of three combos chosen at checkout — rated at 90+ days per fill. That is the supply available today. There is no refill price for me to quote, and I am not going to estimate one.
5. Do not plan on a substitute. The water-based Hotel Collection sold at ₹299, ₹999 and ₹1,799 is built for ultrasonic machines. It shares scent names with the cold-air oils and it is not the same product; it does not go in a Vaayu.
6. Ask before you spend. If you need a scent running continuously for years, ring or write to SOSA and ask where Vaayu refill availability stands on the day you are buying. If the answer does not suit your horizon, buy something else — a Sukoon at ₹1,899 has a fully priced consumable behind it.
7. There are no other running costs I can verify. The Vaayu is waterless, so there is no descaling and no water to change. Whether there are consumable filters, service intervals, an AMC or a warranty period is not something I can state here — ask SOSA rather than trusting a number you read anywhere.
Made in India, CE / RoHS / SGS certified, and a portion of every order supports girl-child education through Nanhi Kali.
TL;DR: electricity is roughly ₹7–₹12 a month at eight hours a day and ₹22–₹36 a month running continuously, computed from the rated 5W. Fragrance is the cost that matters, and the Vaayu's is currently bounded by the 400ml in the box because no separate refill oil is sold today. Confirm refill availability with SOSA before spending ₹11,999.
Five watts, and a finite tank
SOSA Vaayu · waterless cold-air nebuliser ₹11,999
Pressurised air atomises undiluted oil into a dry nano-mist — no water, no heat, no residue, and no heating element to draw current. DC 12V / 1A at 5W, under 38 dB, 165 × 80.5 × 215 mm and 0.9 kg. Up to 1000m³ of connected volume, about 2,000–3,000 sq ft depending on ceiling height. 400ml refillable tank rated at 90+ days a fill, with Bluetooth app and onboard buttons, 1h / 4h / 8h / 24h timers, adjustable mist intensity, auto-stop and key-lock. Four Hotel Collection cold-air fragrances at 100ml each in the box. No separate refill oil is sold at present — please ask before you commit.
Part one — separate the two costs before you do anything else
Almost every conversation I have about running cost begins in the wrong place. Someone has read that a machine is "energy efficient" and takes that as an answer, or they have seen a wattage figure and assumed it is the whole story. It is not, and it is not even the interesting half. A scenting appliance has a fixed cost of ownership made of three things — what you paid for the box, what it draws from the wall, and what you feed it — and only the last of those is genuinely variable, genuinely large, and genuinely worth investigating before you buy. What follows separates all three, computes the ones that can be computed, and states plainly which one currently cannot be.
1
COST ONE · COMPUTABLE
Electricity, and why cold-air draws so little
The two fragrance technologies that draw real power are heat and ultrasound. A heated diffuser or a wax warmer has an element in it; an ultrasonic machine drives a piezoelectric plate at high frequency and usually a small fan alongside. A cold-air nebuliser has neither — it has a small pump that pressurises air across a nozzle. That is why the Vaayu's rated draw is DC 12V / 1A, or 5W. For scale, 5W is roughly what a phone charger idles at, and about a hundredth of what a domestic geyser element pulls. It is not a number that changes anybody's behaviour, which is precisely why I want it computed and then set aside.
The point: if you are choosing between machines on electricity alone, you are optimising the smallest line on the page.
2
COST TWO · THE REAL ONE
Fragrance — the consumable that outspends everything
Reed oil refill₹2,399 · reeds onlyAcross every format we sell, the oil is what you actually spend money on over years. Take our reed range, where I can show you the whole arithmetic because every price is published. A 50ml Mountain Breeze at ₹849 lasts six to eight weeks — that is 42 to 56 days, so ₹15 to ₹20 a day. The 130ml at ₹1,349 lasts 14–18 weeks, or 98 to 126 days, which works out at ₹11 to ₹14 a day. The 300ml oil refill at ₹2,399 keeps a vessel running roughly eight to eleven months, which is ₹7 to ₹10 a day. Note what happens across those three lines: the machine — in this case a glass bottle and six reeds — is nearly free, and the fragrance is the entire cost. The same shape holds for an electric machine. That refill is for reed diffusers only and does not go in any machine.
The lesson to carry into any machine purchase: ask the price of the consumable first, and the price of the box second.
3
COST THREE · OPEN
The Vaayu's consumable, stated honestly
Here is the position, and I would rather you read it on this page than discover it in month four. SOSA does not currently sell a separate refill oil for the Vaayu. The machine arrives with 400ml of cold-air fragrance in four 100ml bottles, in one of three combos you choose at checkout, and the tank is rated at 90+ days a fill. That in-box supply is the fragrance available today, and because there is no refill SKU there is no per-millilitre price for me to put in a table. I will not estimate one, I will not point you at the water-based Hotel Collection as a substitute — it is a different product for ultrasonic machines and does not belong in a Vaayu — and I will not pretend the gap is not there. If continuity of supply is part of your decision, ask SOSA where refills stand before you buy. We name this gap the same way we name the missing replacement reeds in the reed range: out loud, in the shopping guide.
Part two — the electricity, worked out at five tariffs and five run patterns
Every figure in this table is arithmetic on the Vaayu's rated 5W and nothing else. It is not a measurement taken from a plug-in meter, and it is not a bill. Indian domestic tariffs vary a great deal by state, by discom and by consumption slab — ₹6 to ₹10 a unit covers most household situations but yours may sit outside it, and fixed charges, duties and surcharges are not included here.
The electricity, computed
5W at five daily run patterns, priced at three tariffs
| Run pattern | Energy a day | Energy a month | Energy a year | At ₹6 a unit | At ₹10 a unit |
|---|---|---|---|---|---|
| 24 hours a day ★ | 0.12 kWh | 3.6 kWh | 43.8 kWh | ₹22 a month · ₹263 a year | ₹36 a month · ₹438 a year |
| 16 hours a day | 0.08 kWh | 2.4 kWh | 29.2 kWh | ₹14 a month · ₹175 a year | ₹24 a month · ₹292 a year |
| 12 hours a day | 0.06 kWh | 1.8 kWh | 21.9 kWh | ₹11 a month · ₹131 a year | ₹18 a month · ₹219 a year |
| 8 hours a day | 0.04 kWh | 1.2 kWh | 14.6 kWh | ₹7 a month · ₹88 a year | ₹12 a month · ₹146 a year |
| 4 hours a day | 0.02 kWh | 0.6 kWh | 7.3 kWh | ₹4 a month · ₹44 a year | ₹6 a month · ₹73 a year |
| The honest caveat: this is straight multiplication on the manufacturer's rated 5W — watts × hours ÷ 1,000 gives kilowatt-hours, and kilowatt-hours × your tariff gives rupees. Real draw fluctuates with the intensity setting and the pump duty cycle, and a rated figure is a ceiling rather than an average, so these numbers are more likely to overstate than understate. Tariffs vary by state, discom and slab, and fixed charges and duties are excluded. The table exists to show you the order of magnitude, which is tens of rupees a year, not to predict your bill. A reed diffuser, for the avoidance of doubt, uses none of it. | |||||
Shop this guide
Three formats, three very different running costs
Vaayu · 5W, 400ml in the box₹11,999Shop → Sukoon · one room, priced consumable₹1,899Shop → Mountain Breeze · no electricity at allfrom ₹849Shop →
The SOSA principle
The cost you can compute is never the cost that decides it. Ask the price of the oil, not the wattage.
Electricity on a 5W machine is tens of rupees a year. Fragrance, across every format we make, is where the money goes — which is why we would rather tell you our supply position than sell you a wattage figure.
Part three — the fragrance cost, and the question I cannot answer for you
If you have read the running-cost pages of other scenting brands you will have noticed that they all publish a cost-per-day, and you may have wondered why this one does not. The reason is simple and I would rather be plain about it than clever. A cost-per-day for fragrance requires a price per millilitre, and a price per millilitre requires a product you can buy — and today SOSA does not sell a separate Vaayu refill oil. The 400ml in the box, at 90+ days a fill, is the whole of it. I could construct a figure by dividing ₹11,999 by ninety days and calling it ₹133 a day, but that would be amortising the machine as though it were a consumable, which it is not. I could reach for the price of the water-based Hotel Collection and imply that a cold-air oil would price similarly, which would be a guess dressed as arithmetic and, worse, would nudge you toward putting the wrong liquid in an expensive machine. Neither of those helps you.
What I can do is tell you exactly what to ask, and give you a comparison that is fully priced so you have a reference point. Ask SOSA three questions before you buy: is a cold-air Vaayu refill oil available today; if not, is one planned and on what horizon; and what does SOSA advise for an owner who reaches the end of the in-box 400ml in the meantime. Those are fair questions and you should expect a straight answer to all three. Now the reference point. Our reed range is priced end to end, so its running cost can be stated exactly: a 50ml bottle from ₹749 lasting six to eight weeks is roughly ₹13 to ₹20 a day per room; a 130ml from ₹1,249 lasting 14–18 weeks is roughly ₹10 to ₹14 a day; and the oil-only refill at ₹2,399 for 300ml, which keeps a vessel going eight to eleven months, brings that down to about ₹7 to ₹10 a day. Those are per-room figures for a small room, they include no electricity because reeds use none, and they are the honest yardstick against which any machine's fragrance cost should be measured.
And a boundary worth stating clearly, because running-cost pages are where brands tend to overclaim. A scent machine adds fragrance to a space and does nothing else. It does not purify, filter, sanitise, dehumidify or remove any smell; it does not affect anybody's health, sleep, concentration or mood; and no part of the money you spend on it is buying any of those things. If a room smells of something you would rather it did not, the extractor fan and an open window come first, and fragrance comes afterwards. I would rather you spent ₹11,999 knowing precisely what it buys — a large, controllable, quiet, dry field of fragrance across up to 1000m³ — than on a promise nobody can keep.
The wattage is the number a brochure gives you. The price of the oil is the number that decides whether you should buy.
— Sonal Sahani, SOSA
Part four — the full ownership ledger, with certainty marked
Every line an owner will actually pay, with an explicit note on whether the figure is verified, computed or open. The last column is the action I would take on each line if I were buying this week.
The running-cost ledger
What you pay, how sure we are, and what to do
| Cost line | The figure | How certain | What to do about it |
|---|---|---|---|
| Fragrance after the first tank ★ | No refill oil currently sold | Open — and the reason this page exists | Ask SOSA before you buy. If supply matters, make it a condition |
| The machine | ₹11,999 once, including 400ml of oil | Verified from the live product page | Free shipping above ₹499. One payment, not recurring |
| Fragrance in the box | 400ml · 90+ days a fill | Manufacturer specification, at a mid intensity | Treat it as your whole budget and set intensity accordingly |
| Electricity | ₹7–₹12 a month at 8 hrs/day · ₹22–₹36 at 24 hrs/day | Arithmetic on the rated 5W — tariffs vary by state | Compute it once, then stop thinking about it |
| Water, descaling, filters | Nil for water — the machine is waterless | Waterless operation is verified; filter parts are not | Ask SOSA whether any serviceable part exists |
| Warranty, AMC, installation | Not stated anywhere I can verify | Unverified — I will not invent terms | Get it in writing from SOSA at the point of sale |
| The fully priced comparison: reed diffusers | ₹15–₹20 a day on 50ml · ₹7–₹10 on the 300ml refill | Arithmetic on published prices and stated bottle life | Use as your yardstick for what fragrance ought to cost |
Honest notes for buyers: every electricity figure on this page is arithmetic on the Vaayu's rated 5W — watts × hours ÷ 1,000 for kilowatt-hours, then multiplied by an assumed tariff. Tariffs vary by state, discom and consumption slab; fixed charges and duties are excluded; nothing here is a quotation of any household's bill. The 400ml tank and the 90+ days per fill are manufacturer specifications at a mid intensity setting and will shorten at higher intensity or in a larger volume. SOSA does not currently sell a separate Vaayu refill oil — the 400ml supplied in the box is the cold-air fragrance available at the time of writing, and anyone who needs long-term supply should confirm current availability with SOSA before purchasing. The water-based Hotel Collection at ₹299 / ₹999 / ₹1,799 is a different product made for ultrasonic machines and must not be used in a Vaayu; reed diffuser oil goes in neither. Warranty length, AMC terms, installation service, spare parts and app platform availability are not verified — ask SOSA. No health, mood, air-purification or odour-removal claim is made or implied. Free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
If a priced consumable is your deciding factor
SOSA Sukoon · 500ml ultrasonic ₹1,899
There is a legitimate reading of this page that ends with you buying a Sukoon instead, and I would not argue with it. It covers 270–320 sq ft, runs 16–18 hours on low from a 500ml tank, has a remote and steady / 2H / 4H timers, and arrives with three 15ml Hotel Collection fragrances in the box. Crucially for a running-cost decision, its fragrance is a product you can buy again at a published price — the water-based Hotel Collection at 15ml ₹299, 100ml ₹999 and 300ml ₹1,799. If your space is one room rather than a whole floor, this is the honest purchase.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
I nearly did not publish this page. A running-cost guide that ends in "ask us" rather than a tidy figure is not a comfortable thing for a brand to put on the internet, and I know exactly how it reads next to a competitor's confident cost-per-day. But the alternative was to invent a refill price for a product we do not currently sell, and there is no version of that I could live with.
So here is what I decided instead. Everything computable gets computed and shown as arithmetic you can check — the 5W, the kilowatt-hours, the tariff multiplication, the reed diffuser cost per day on prices you can see on our own site. Everything that is open gets labelled open, in the summary box, in the body, in the table and in the citation strip, so that nobody reaches the end of this page uncertain about where they stand.
A reader who learns our supply position before spending ₹11,999 is far better served than one who is sold a fantasy and finds out in month four. If that costs us a sale this week, so be it. Everything we make is composed in Pune, and a part of every order funds a girl's classroom through Nanhi Kali.
Frequently asked questions
How much electricity does a cold-air scent diffuser use?
The SOSA Vaayu is rated DC 12V / 1A at 5W. Running it continuously is 0.12 kWh a day, about 3.6 kWh a month and 43.8 kWh a year — so roughly ₹22 to ₹36 a month depending on your state tariff. At eight hours a day it is 1.2 kWh a month, or about ₹7 to ₹12. These are arithmetic on the rated wattage, not a measurement of anyone's bill, and tariffs vary considerably across India.
How much does the fragrance cost to replace?
SOSA does not currently sell a separate refill oil for the Vaayu, so there is no price to quote and I will not estimate one. The machine ships with 400ml — four Hotel Collection cold-air fragrances at 100ml each — rated at 90+ days per fill, and that is the supply available today. If long-term supply matters to your purchase, confirm current refill availability with SOSA before you buy.
Can I refill it with the Hotel Collection oil sold at ₹299 and ₹999?
No. That product is water-based and made for ultrasonic machines such as the Sukoon and Boond. A cold-air nebuliser runs undiluted oil through a pressurised nozzle and needs a different formulation entirely. The two share scent names, which causes the confusion, but they are not interchangeable. Reed diffuser oil goes in neither machine.
Is a reed diffuser cheaper to run than a machine?
Per room, yes, and it uses no electricity. A 50ml SOSA reed diffuser from ₹749 lasting six to eight weeks works out at roughly ₹13 to ₹20 a day; on the 300ml oil refill at ₹2,399 it falls to about ₹7 to ₹10. What a reed diffuser cannot do is cover an open floor or be turned on before guests arrive — you are buying reach and control when you buy a machine, not cheaper fragrance.
Are there any hidden running costs — filters, servicing, descaling?
The Vaayu is waterless, so there is no water to change and no scale to remove, which removes the commonest ultrasonic maintenance chore. Beyond that I cannot verify what serviceable parts exist, what warranty applies or whether an AMC is offered, so I am not going to state any of it. Ask SOSA directly and get the answer in writing at the point of sale.
Large-space scenting · running cost
Electricity: a few rupees a month. Fragrance: ask before you buy
The SOSA Vaayu at ₹11,999 nebulises undiluted oil into a dry cold-air mist across up to 1000m³, from a 400ml tank rated at 90+ days a fill, at under 38 dB on a rated 5W — about ₹7 to ₹36 a month of electricity depending on run hours and your state tariff. It ships with four Hotel Collection cold-air fragrances at 100ml each. No separate Vaayu refill oil is sold at the time of writing, so confirm current availability with SOSA before committing. Free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
See the Vaayu → Sukoon ₹1,899
Continue the read
More on running cost and consumption
- How much fragrance oil does a cold-air diffuser use? — consumption as a setting rather than a spec.
- What is the monthly running cost of a SOSA Vaayu? — the same question, answered month by month.
- Is a cold-air diffuser expensive to maintain? — maintenance against consumables.
- The complete running-cost and consumption guide — 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 the true running cost of a cold-air scent diffuser in an Indian home. Electricity figures are arithmetic on the Vaayu's rated 5W (watts × hours ÷ 1,000 = kilowatt-hours, multiplied by an assumed tariff of ₹6 to ₹10 a unit); they are not measurements, not quotations of any household bill, and exclude fixed charges and duties. Tariffs vary by state, discom and consumption slab. Reed diffuser cost-per-day figures are arithmetic on published SOSA prices and stated bottle life. Tank capacity and days-per-fill are manufacturer specifications that vary with intensity setting, run hours, ceiling height, ventilation and season. No health, mood, air-purification or odour-removal claim is made or implied.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.