★ SOSA reed diffusers · AC vents
Putting a reed diffuser in front of an AC vent does not spread the fragrance around the room. It spends the bottle faster and delivers less of it
★ ★ ★ ★ ★
★★★★★
"I put it right under the vent on purpose, thinking the AC would carry it everywhere. Six weeks of oil gone in about three and a half, and the room never smelled of anything."
Fresh Brew 50ml
★★★★★
"The phrase that changed it for me: the air conditioner has no fragrance in it. It only moves what the reeds give it — and it moves it away."
Living room · split unit
★★★★★
"Moved the bottle from the vent shelf to the sideboard eight feet away. The level stopped racing and my mother-in-law noticed the scent from the corridor."
Mountain Breeze 130ml
★★★★★
"Two bottles, same scent, same week. One under the vent, one across the room. The comparison was embarrassing and completely convincing."
Side-by-side test
★★★★★
"I wanted the AC to push scent into the corridor. Ended up buying a Sukoon for that job and leaving the reeds to do theirs."
Sukoon ₹1,899
★★★★★
"The reeds near the vent had gone pale and dry at the top while the oil was still high. That told me everything before I read the article."
Reed condition · wet line
★★★★★
"I put it right under the vent on purpose, thinking the AC would carry it everywhere. Six weeks of oil gone in about three and a half, and the room never smelled of anything."
Fresh Brew 50ml
★★★★★
"The phrase that changed it for me: the air conditioner has no fragrance in it. It only moves what the reeds give it — and it moves it away."
Living room · split unit
★★★★★
"Moved the bottle from the vent shelf to the sideboard eight feet away. The level stopped racing and my mother-in-law noticed the scent from the corridor."
Mountain Breeze 130ml
★★★★★
"Two bottles, same scent, same week. One under the vent, one across the room. The comparison was embarrassing and completely convincing."
Side-by-side test
★★★★★
"I wanted the AC to push scent into the corridor. Ended up buying a Sukoon for that job and leaving the reeds to do theirs."
Sukoon ₹1,899
★★★★★
"The reeds near the vent had gone pale and dry at the top while the oil was still high. That told me everything before I read the article."
Reed condition · wet line
✓ Six fibre reeds per bottle · alcohol-free, phthalate-free CCT base · handmade in Pune ✓ 50ml lasts 6–8 weeks · 130ml lasts 14–18 weeks · oil refill 300ml ₹2,399 ✓ Free shipping above ₹499 · a portion funds girl-child education through Nanhi Kali
Founder Diaries · Reed Diffusers · AC Vents
Why the intuition fails: distribution needs air that lingers in the room. A vent's jet is fast and directional; it removes vapour from the reeds quicker than capillary action replaces it and disperses it into a stream nobody stands in.
What it costs: weeks off the bottle, a weaker room, and reeds that dry out at the exposed end while oil is still sitting in the glass. Three losses at once.
The legitimate version: if you genuinely want machine-driven distribution, buy a machine — a Sukoon at ₹1,899 covers 270–320 sq ft. Do not ask a passive format to be an active one.
Mountain Breeze₹849 · 9.4/10The first loss is time. A 50ml is rated at six to eight weeks with six reeds, and in the correspondence we receive, bottles standing in a split's direct throw come back finishing meaningfully inside that window — often by a matter of weeks rather than days. That is SOSA working guidance from customer reports and our own placement tests, not a laboratory figure, and it varies with how fast and how directly the air hits. The second loss is presence: those same customers describe rooms that smell of nothing while the level visibly falls. The third loss is the reeds. Fibre reeds are the consumable in this system, and a stripped, dried reed end does not recover fully even after a flip. Since replacement reeds are not sold separately — an honest gap in our range — a vent quietly consumes the one component you cannot simply reorder.
Fresh Brew · 9.5/10from ₹849Shop → 
Mountain Breeze · 9.4/10from ₹849Shop → 
Sukoon · 270–320 sq ft₹1,899Shop →
SOSA reed diffuser range & prices (verified August 2026): alcohol-free, phthalate-free, paraben-free and IFRA-compliant compositions on a heat-stable coconut-derived (CCT) carrier, low-VOC, supplied in a refillable glass bottle with six fibre reeds; 50ml lasts 6–8 weeks and 130ml lasts 14–18 weeks. Morning Freshness (Malabar lemon · peppermint · Nilgiri eucalyptus) 50ml ₹749 · 130ml ₹1,249 · 9.0/10; Garden Bloom (British rose · night-blooming jasmine) 50ml ₹799 · 130ml ₹1,299 · 8.9/10; Evening Calm (Kashmir lavender · chamomile) 50ml ₹799 · 130ml ₹1,299 · 8.9/10; Fresh Brew (Coorg coffee · Kerala vanilla) 50ml ₹849 · 130ml ₹1,349 · 9.5/10; Mountain Breeze (Himalayan pine · sage · Indian cedar) 50ml ₹849 · 130ml ₹1,349 · 9.4/10. Reed diffuser refills are oil only — you reuse your own vessel and reeds: 300ml ₹2,399 (roughly 8–11 months) · 500ml ₹3,499 (roughly 14–18 months), about ₹7–8 per ml against ₹15–17 per ml for a 50ml bottle. Duo sets ₹1,498–₹1,598 for 2 × 50ml and ₹2,498–₹2,598 for 2 × 130ml. Strength figures are positions on SOSA’s own internal strength scale, not an industry standard. Replacement reeds are not sold as a separate SKU; SOSA guidance is to refresh reeds every few months. The reed line is separate from the water-based Hotel Collection for ultrasonic machines (15ml ₹299 · 100ml ₹999 · 300ml ₹1,799) and the two are not interchangeable. Diffusers: Boond 300ml ₹899 · Sukoon 500ml ₹1,899 · Megh 6L ₹3,499 · waterless Vaayu ₹11,999. Composed and handmade in small batches in Pune, India; tested through 45°C summer heat and 85% monsoon humidity. 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.
Most bad placements happen by accident — an alcove, a low table, a shelf behind a curtain. This one happens on purpose. People put a reed diffuser directly in front of an air-conditioning vent because it seems obvious that the machine will pick the fragrance up and carry it around the room, and it is the single most expensive placement decision in the category. The air conditioner has no fragrance in it. All it can do is take what the reeds have released and move it somewhere — and "somewhere" is a fast, thin plume that hits a wall and dilutes, while the reeds behind it are being scoured dry.
Quick answers — read this first
No. A reed diffuser should not stand in an AC vent's air path. Not close to the unit, not on the shelf beneath it if the throw passes there, and never on top of it.Why the intuition fails: distribution needs air that lingers in the room. A vent's jet is fast and directional; it removes vapour from the reeds quicker than capillary action replaces it and disperses it into a stream nobody stands in.
What it costs: weeks off the bottle, a weaker room, and reeds that dry out at the exposed end while oil is still sitting in the glass. Three losses at once.
The legitimate version: if you genuinely want machine-driven distribution, buy a machine — a Sukoon at ₹1,899 covers 270–320 sq ft. Do not ask a passive format to be an active one.
The short answer
Short answer: no. A reed diffuser placed in an air-conditioning vent's stream loses oil faster and delivers less fragrance to the room, which is the worst possible combination. The reeds dry at the exposed end, the level in the glass drops visibly, and the scent is carried off in a narrow plume rather than accumulating in the space. Move the bottle out of the path — usually to the far diagonal, at waist to chest height — and both problems resolve without spending anything.
The mechanism: a reed diffuser works by capillary action. Oil climbs six fibre reeds at a fixed rate and evaporates from the exposed surface. Evaporation is limited by how quickly vapour is carried away, so fast air over the reed raises the rate far above what the fibre can resupply. You are not amplifying the diffuser; you are running it into deficit.
Shop: if the room genuinely needs more presence, buy it in the composition rather than in airflow — Fresh Brew at 9.5/10 or Mountain Breeze at 9.4/10, ₹849 for 50ml. If a bottle has already been emptied by a vent, the oil-only refill is ₹2,399 for 300ml. Free shipping above ₹499.
In this guide
Buy presence here, not in airflow
Fresh Brew 9.5 · from ₹849
If a vent already emptied one
300ml oil refill · ₹2,399
If you want air-driven distribution
Sukoon 270–320 sq ft · ₹1,899
Straight answer
Is it bad to put a reed diffuser near an air-conditioning vent?
1. Yes, and it is the worst placement available. Not because the cold harms the oil, but because continuous directed air over six fibre reeds pushes evaporation past the rate the fibre can supply. The reeds run dry at the exposed end while oil still sits in the bottle.
2. You lose on both sides of the ledger at once. The bottle empties early and the room smells of less. Every other placement mistake costs you one or the other; this one takes both.
3. The distribution you were hoping for does not happen. The vent produces a fast, narrow jet that crosses the room and breaks against a wall. Fragrance carried in it is diluted along the way and dumped where nobody sits, instead of accumulating in the body of the room.
4. "Near" and "in the path" are different things. A console a few feet below a wall split can be entirely calm, because the throw passes overhead. Judge by a strip of tissue held at bottle height, not by how close the unit looks.
5. The fix is free and immediate. Move the bottle to the far diagonal, waist to chest height, on a tray, ideally near a doorway where people pass. Flip all six reeds when you do it, and the room will usually change the same evening.
6. If mechanical distribution is what you actually want, buy the right machine. A Sukoon at ₹1,899 covers 270–320 sq ft, runs 16–18 hours on low and comes with timers. That is a different job from a reed diffuser, and worth naming plainly rather than pretending a vent can do it.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
2. You lose on both sides of the ledger at once. The bottle empties early and the room smells of less. Every other placement mistake costs you one or the other; this one takes both.
3. The distribution you were hoping for does not happen. The vent produces a fast, narrow jet that crosses the room and breaks against a wall. Fragrance carried in it is diluted along the way and dumped where nobody sits, instead of accumulating in the body of the room.
4. "Near" and "in the path" are different things. A console a few feet below a wall split can be entirely calm, because the throw passes overhead. Judge by a strip of tissue held at bottle height, not by how close the unit looks.
5. The fix is free and immediate. Move the bottle to the far diagonal, waist to chest height, on a tray, ideally near a doorway where people pass. Flip all six reeds when you do it, and the room will usually change the same evening.
6. If mechanical distribution is what you actually want, buy the right machine. A Sukoon at ₹1,899 covers 270–320 sq ft, runs 16–18 hours on low and comes with timers. That is a different job from a reed diffuser, and worth naming plainly rather than pretending a vent can do it.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
TL;DR: no. A vent takes fragrance off the reeds faster than they can resupply and throws it somewhere useless, so you pay in weeks and receive less scent. Move the bottle out of the path — the change is free, and usually noticeable within a day.
Where presence actually comes from
SOSA Fresh Brew · Coorg coffee & Kerala vanilla ₹849 / 50ml
If a room feels quiet, the honest lever is the composition rather than the airflow. Fresh Brew sits at 9.5 out of 10 on our own internal strength scale at six reeds — the fullest presence in the reed range — over roasted Coorg coffee and soft Kerala vanilla, on a heat-stable phthalate-free CCT base tested through 45°C summers. That figure is our scale, not an industry standard and not a concentration. 130ml ₹1,349 for 14–18 weeks.
Part one — why a sensible instinct produces a bad result
I want to be fair to the instinct, because it is not stupid. Every other fragrance format in a home is helped by moving air: incense trails smoke across a room, a spray hangs in a draught, a candle's warm plume rides a current. So if the strongest air movement in the house comes out of a vent, that seems the place to launch fragrance from. The step that breaks is the assumption that a reed diffuser has a reservoir of vapour waiting to be swept away. It has no such reservoir. It has a rate.
1
THE MISTAKE
The vent has nothing to give — it can only take
Oil climbs each fibre reed by capillary action at a pace set by the fibre, the viscosity of the CCT base and the temperature, and it evaporates from whatever surface is exposed to air. That evaporation is limited by how fast vapour is carried away from the surface. Put the reed in still air and a thin saturated layer sits around it, slowing things down. Put it in fast air and that layer is stripped continuously, so evaporation runs at the maximum the surface can manage. The reed cannot resupply at that pace, so the exposed end runs dry while oil remains in the glass — you will see the wet line sink low and the top few centimetres go pale and papery. Meanwhile the fragrance that does leave is immediately diluted into a fast-moving jet. Nothing about this arrangement fills a room; it only spends a bottle.
The physical point: airflow does not add fragrance to the air. It only changes how fast the reed gives up what it has.
2
THE THREE LOSSES
Weeks, presence, and the reeds themselves
Mountain Breeze₹849 · 9.4/10The first loss is time. A 50ml is rated at six to eight weeks with six reeds, and in the correspondence we receive, bottles standing in a split's direct throw come back finishing meaningfully inside that window — often by a matter of weeks rather than days. That is SOSA working guidance from customer reports and our own placement tests, not a laboratory figure, and it varies with how fast and how directly the air hits. The second loss is presence: those same customers describe rooms that smell of nothing while the level visibly falls. The third loss is the reeds. Fibre reeds are the consumable in this system, and a stripped, dried reed end does not recover fully even after a flip. Since replacement reeds are not sold separately — an honest gap in our range — a vent quietly consumes the one component you cannot simply reorder.
The tell: level falling fast, room quiet, reed tops pale and dry. All three together means draught, every time.
3
THE DISTINCTION THAT MATTERS
"Near the vent" is not the same as "in the throw"
Proximity is not the test, and this is where people over-correct after reading advice like this. A high wall split throws air along the upper third of the room; the shelf directly under it is often perfectly calm, while a console two metres away at head height sits squarely in the stream. A cassette throws in four arms with quiet zones between them. The only reliable test is a strip of tissue taped to a pencil, held at bottle height with the unit running on high. Where it hangs still, the bottle is safe. Where it lifts, it is not — whatever the distance says. Do that once and you never have to guess about this room again.
Part two — what the stream costs, position by position
Here is the same bottle — a 50ml with its standard six reeds, rated at six to eight weeks — imagined in five positions relative to a vent. The week figures are our working guidance rather than measurements; the pattern is what matters, and the pattern is consistent.
The cost of the stream
One bottle, five positions relative to the vent
| Position relative to the vent | Air speed at the reeds | How the room reads at week four | Likely life of a 50ml | What you actually lose |
|---|---|---|---|---|
| Far diagonal, out of the path ★ | Slow, well-mixed circulation | Even, present across the room | Normal 6–8 weeks, often the long end | Nothing — this is the target |
| Beside the unit, outside the throw | Calm; the jet passes elsewhere | Normal, sometimes very good | Normal | Nothing, if the tissue confirms it |
| Directly beneath a high wall split | Usually calm, occasionally not | Normal when calm | Normal when calm | Only the risk of guessing wrong |
| Two to four feet into the throw | Constant, unmistakable movement | Thin; strong only right at the glass | Noticeably short of the window | Weeks, presence, and reed condition |
| On the unit, or in the louvre's mouth | Maximum, continuous | Almost nothing in the room | Well short — the worst case we see | Everything, including the reeds |
| The honest caveat: the bottle-life columns here are SOSA working guidance drawn from in-house placement testing and customer correspondence, not laboratory data, and they move with unit type, air speed, room volume and season. The direction of the effect is reliable even when the magnitude is not: air over the reeds always costs you oil, and only sometimes gives you a room. Strength ratings elsewhere on this page are positions on SOSA's internal scale at six reeds, not an industry standard. | ||||
Shop this guide
The three honest ways to get a fuller room
Fresh Brew · 9.5/10from ₹849Shop → Mountain Breeze · 9.4/10from ₹849Shop → Sukoon · 270–320 sq ft₹1,899Shop →
The SOSA principle
A vent cannot amplify a reed diffuser. It can only spend it faster and aim it worse.
Every other bad placement costs you either weeks or presence. This is the only one that reliably costs you both at the same time — which is why it is worth a whole page.
Part three — what you were actually trying to do
Underneath the vent question there is almost always a real, reasonable goal, and it is worth naming because the goal is achievable even though the method is not. Usually it is one of three. Some people want the fragrance to reach a second space — a corridor, an adjoining dining area, a stairwell — and hope the AC will push it through. Some want the room to smell strong quickly, before guests arrive. And some simply find that the room reads quiet and are reaching for the only source of energy in it. None of those three is solved by a vent, and each has a straightforward answer that does not cost you a bottle.
For reaching a second space, the answer is a second source, not more force. Output per bottle is fixed; the only way to raise the total fragrance in a home is another bottle, which is why two 50ml at opposite ends of an open living-dining beat one 130ml in the middle. For speed, accept that reeds cannot surge — the format is constant and passive by design, and a room that must smell different within twenty minutes is asking for a machine. And for a quiet room, work the free ladder in order: flip all six reeds, move the bottle into gentle passing air near a doorway at waist-to-chest height, close the room for an hour before you judge it, and only then add reeds, which costs bottle life roughly in proportion — nine reeds takes a 50ml closer to five weeks than eight.
There is also a version of the vent idea that is legitimate, and it is worth stating precisely. You do want the room's air to circulate; you simply want it to circulate around the bottle rather than through it. That is the difference between intermittent and continuous movement. A door opening, a person walking past, a ceiling fan on its lowest setting several feet away — these stir the room in bursts, distributing fragrance without holding the reeds in a permanent gale. Intermittent human traffic is the airflow a reed diffuser is designed around. Continuous mechanical air is not, and no amount of good intentions changes which side of that line a vent falls on.
The vent does not carry your fragrance into the room. It carries it out of your bottle.
— Sonal Sahani, SOSA
Part four — the right way to get what you wanted
Three goals, the vent version of each, and the version that actually works. The first two rows cost nothing at all.
Same goal, better method
What people are reaching for, and what to do instead
| What you want | The vent version | What to do instead | Cost |
|---|---|---|---|
| A fuller room, generally ★ | Put the bottle in the airflow | Flip all six, move to the far diagonal near a doorway | Free |
| Noticeably more presence | Aim the louvre at it | Add two to three reeds, accepting a shorter bottle | Free · 50ml runs nearer 5 weeks at nine reeds |
| More presence without losing weeks | Nothing the vent can do | Move up the scale to Fresh Brew 9.5 or Mountain Breeze 9.4 | ₹849 · 50ml |
| Fragrance in a second room or corridor | Blow it through the doorway | A second bottle in that space — sources, not force | From ₹749, or a duo from ₹1,498 |
| Scent on demand, before guests | Turn the AC up an hour early | An ultrasonic Sukoon, 270–320 sq ft, timers and remote | ₹1,899 · three 15ml scents in the box |
| To recover a bottle a vent has drained | — | Refresh the reeds, then refill the oil and place it properly | ₹2,399 · 300ml, roughly 8–11 months |
Honest notes for buyers: the bottle-life effects described on this page are SOSA's own working guidance from in-house placement testing and customer correspondence, not laboratory measurements; results vary with unit type, air speed, room volume, ceiling height and season. Strength ratings are positions on SOSA's internal scale at six reeds, not an industry standard. The refills are oil only — you reuse your own glass vessel and your own reeds — and replacement reeds are not sold as a separate item, which is a genuine gap; our guidance is to refresh reeds every few months. Reed oil never goes in a Sukoon or Boond, and the water-based Hotel Collection never goes in a reed bottle. Stand the bottle on a tray, keep it out of direct sun and away from children and pets. Handmade in small batches in Pune; a portion of every order supports girl-child education through Nanhi Kali.
When you truly want air to do the distributing
SOSA Sukoon · 500ml ultrasonic diffuser ₹1,899
If the reason you reached for the vent was that you wanted a room to change on demand, this is the honest answer rather than a third reed bottle. The Sukoon covers 270–320 sq ft, runs 16–18 hours on low, has a remote and steady, two-hour and four-hour timers, and comes with three 15ml Hotel Collection fragrances in the box. It is a different product line entirely: water-based Hotel Collection only. Reed oil never goes in it, and Hotel Collection never goes in a reed bottle. Most homes end up running both formats, in different rooms, for different jobs.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
We ran this as a side-by-side once, because arguing about it in the studio was getting us nowhere. Two identical bottles of the same batch, six reeds each, opened on the same morning. One went on a shelf in the direct throw of the split; the other went on a console on the far diagonal. The one in the throw went down faster and smelled of less, and the difference was not subtle by the third week.
What struck me most was the state of the reeds. The ones in the stream had gone pale and stiff at the exposed end while there was still plenty of oil in the glass. Since we do not sell reeds separately, that is the part of the loss I mind most, and I would rather say so than let it happen quietly in someone's living room.
So the answer to this question is a simple no, with no hedging. Move the bottle. If what you actually wanted was a room that changes when you press something, buy a machine and let the reeds do the constant, low, background work they are built for. Everything 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
Will an AC vent help spread my reed diffuser's fragrance?
No. It moves fragrance away from the reeds faster than the fibre can resupply, and disperses it into a narrow jet that dilutes against a wall rather than accumulating in the room. You end up with a bottle going down quickly and a room that smells of very little. Gentle, intermittent air — a doorway, footfall, a slow fan several feet away — is what distributes fragrance.
How close is too close to an AC vent?
There is no fixed distance, because it depends on direction rather than proximity. A console directly beneath a high wall split is often calm; a shelf across the room at head height is often in the stream. Hold a strip of tissue at bottle height with the unit on high — if it lifts, the spot is too close in the only sense that matters.
My diffuser was near the vent and finished early. Is the bottle faulty?
Almost certainly not. Fast air raises evaporation past the rate the reeds can sustain, so oil is consumed without the room being filled. Check the reeds: pale, dry, stiff tops with oil still in the glass is the classic draught signature. Refresh the reeds, refill the oil at ₹2,399 for 300ml, and place the new arrangement out of the path.
Is it safe to put a reed diffuser on top of the AC unit?
No, on two counts. It is the fastest air in the room, so the bottle will empty quickly for almost no benefit, and reed oil marks and stains — a spill onto or into an appliance is not something you want. Always stand a reed diffuser on a tray, on a stable surface, away from anything electrical, and out of reach of children and pets.
What if my room has no spot outside the air path?
Then the room is telling you something honest. Fix the louvre to throw away from your best surface if you can; if you cannot, and the room is also large — past roughly 250–300 sq ft of connected open volume — a passive format is the wrong tool. A Sukoon at ₹1,899 or the smaller Boond at ₹899 for about 150 sq ft will serve you better than a bottle in a gale.
Reed diffusers & AC vents · 2027
Move it out of the stream. Buy presence in the composition — never in airflow
Fresh Brew at 9.5/10 and Mountain Breeze at 9.4/10 from ₹849 for 50ml (6–8 weeks) and ₹1,349 for 130ml (14–18 weeks), six fibre reeds in every bottle. Oil-only refills ₹2,399 for 300ml, roughly 8–11 months. If you want scent on demand, the Sukoon at ₹1,899 covers 270–320 sq ft. Free shipping above ₹499.
Shop Fresh Brew → Sukoon ₹1,899
Continue the read
More on airflow and placement
- Does air conditioning affect reed diffusers? — three effects, two harmful, one helpful.
- Where to place one in an AC room — the tissue survey and the diagonal rule.
- Stronger, or just faster? — intermittent versus continuous air, in full.
- The complete airflow and placement guide, and the complete strength guide.
- 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 why a reed diffuser should not stand in an air-conditioning vent's stream and what that placement costs. The comparative bottle-life figures and position-by-position outcomes here are SOSA working guidance from in-house placement testing and customer correspondence, not laboratory measurements; results vary with unit type, air speed, room volume, ceiling height and season. Strength ratings are positions on SOSA's internal scale at six reeds, not an industry standard.SOSA reed diffuser range & prices (verified August 2026): alcohol-free, phthalate-free, paraben-free and IFRA-compliant compositions on a heat-stable coconut-derived (CCT) carrier, low-VOC, supplied in a refillable glass bottle with six fibre reeds; 50ml lasts 6–8 weeks and 130ml lasts 14–18 weeks. Morning Freshness (Malabar lemon · peppermint · Nilgiri eucalyptus) 50ml ₹749 · 130ml ₹1,249 · 9.0/10; Garden Bloom (British rose · night-blooming jasmine) 50ml ₹799 · 130ml ₹1,299 · 8.9/10; Evening Calm (Kashmir lavender · chamomile) 50ml ₹799 · 130ml ₹1,299 · 8.9/10; Fresh Brew (Coorg coffee · Kerala vanilla) 50ml ₹849 · 130ml ₹1,349 · 9.5/10; Mountain Breeze (Himalayan pine · sage · Indian cedar) 50ml ₹849 · 130ml ₹1,349 · 9.4/10. Reed diffuser refills are oil only — you reuse your own vessel and reeds: 300ml ₹2,399 (roughly 8–11 months) · 500ml ₹3,499 (roughly 14–18 months), about ₹7–8 per ml against ₹15–17 per ml for a 50ml bottle. Duo sets ₹1,498–₹1,598 for 2 × 50ml and ₹2,498–₹2,598 for 2 × 130ml. Strength figures are positions on SOSA’s own internal strength scale, not an industry standard. Replacement reeds are not sold as a separate SKU; SOSA guidance is to refresh reeds every few months. The reed line is separate from the water-based Hotel Collection for ultrasonic machines (15ml ₹299 · 100ml ₹999 · 300ml ₹1,799) and the two are not interchangeable. Diffusers: Boond 300ml ₹899 · Sukoon 500ml ₹1,899 · Megh 6L ₹3,499 · waterless Vaayu ₹11,999. Composed and handmade in small batches in Pune, India; tested through 45°C summer heat and 85% monsoon humidity. 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.