★ SOSA Reed Diffusers · the derived 2BHK number
A two-source 2BHK costs about ₹520 a month in the first year and ₹442–₹569 once you are refilling — and the derivation is four divisions you can check yourself
★ ★ ★ ★ ★
★★★★★
"I wanted a number, not a philosophy. ₹520 a month, with the four divisions printed underneath it. I checked every one against the product pages before ordering."
Day & Night duo ₹1,498
★★★★★
"Two sources, not four. Our 2BHK has five rooms and only two of them are places anyone sits still. That reframing saved me two bottles a cycle."
Fresh & Grounded duo ₹1,548
★★★★★
"The sinking fund for reeds was new to me. ₹749 a year set aside because replacement reeds are not sold separately — an honest thing to put in a budget page."
Morning Freshness 50ml ₹749
★★★★★
"Converting weeks into months is what I had been getting wrong. Six to eight weeks is 1.4 to 1.8 months, not two. My old budget was out by a quarter."
Evening Calm 130ml ₹1,299
★★★★★
"Year two came in at ₹3,499 of oil for both bottles and nothing else. That is the number I now plan around, and it is lower than the year-one figure by design."
500ml refill ₹3,499
★★★★★
"I liked that the page tells you when to spend less. We shut the second bedroom for months at a time, so we run one source and budget about ₹267."
Garden Bloom 50ml ₹799
★★★★★
"I wanted a number, not a philosophy. ₹520 a month, with the four divisions printed underneath it. I checked every one against the product pages before ordering."
Day & Night duo ₹1,498
★★★★★
"Two sources, not four. Our 2BHK has five rooms and only two of them are places anyone sits still. That reframing saved me two bottles a cycle."
Fresh & Grounded duo ₹1,548
★★★★★
"The sinking fund for reeds was new to me. ₹749 a year set aside because replacement reeds are not sold separately — an honest thing to put in a budget page."
Morning Freshness 50ml ₹749
★★★★★
"Converting weeks into months is what I had been getting wrong. Six to eight weeks is 1.4 to 1.8 months, not two. My old budget was out by a quarter."
Evening Calm 130ml ₹1,299
★★★★★
"Year two came in at ₹3,499 of oil for both bottles and nothing else. That is the number I now plan around, and it is lower than the year-one figure by design."
500ml refill ₹3,499
★★★★★
"I liked that the page tells you when to spend less. We shut the second bedroom for months at a time, so we run one source and budget about ₹267."
Garden Bloom 50ml ₹799
Day & Night duo ₹1,498 
Fresh & Grounded duo ₹1,548 
Oil refill 500ml ₹3,499 
Morning Freshness ₹749 
Evening Calm ₹799
✓ Two sources for a 2BHK, not one per room — count air spaces you sit in ✓ 6–8 weeks is 1.4–1.8 months · 14–18 weeks is 3.2–4.2 months. Convert before you budget ✓ Free shipping above ₹499 · a portion of every order funds girl-child education
Founder Diaries · Reader Question · Cost Arithmetic
Where it comes from. ₹1,498 + ₹3,499 = ₹4,997, covering roughly 36–48 weeks in both rooms — 8.3 to 11.1 months. ₹4,997 ÷ 11.1 ≈ ₹450; ₹4,997 ÷ 8.3 ≈ ₹602.
Two sources, not five. Buy per closed air space you actually sit in. In most 2BHKs that is the living-dining zone and one bedroom — the second bedroom, kitchen and bathroom rarely earn a continuous bottle.
The line people forget. Refills are oil only and replacement reeds are not sold separately, so set aside roughly ₹62 a month — one ₹749 bottle a year — to renew a set of fibre reeds.
Fresh & Grounded₹1,548 · 2 × 50mlA month is 4.33 weeks, so ₹749 ÷ 1.846 ≈ ₹406 a month at the long end and ₹749 ÷ 1.385 ≈ ₹541 at the short end for a single fresh 50ml — and a household that rounded eight weeks to "two months" would have budgeted ₹749 ÷ 2 ≈ ₹375 and come up short every cycle. For a 130ml at ₹1,249 the same conversion gives ₹1,249 ÷ 4.15 ≈ ₹301 and ₹1,249 ÷ 3.23 ≈ ₹387. These are ranges, not guarantees: a warm room finishes a bottle sooner because warmth raises the evaporation rate, and a humid month can lengthen it because humidity slows evaporation from the reed surface. The Fresh & Grounded duo at ₹1,548 converts the same way, ₹100 higher.
Day & Night duo · the two sources a 2BHK needs₹1,498Shop → 
500ml refill · 250ml a bottle, 30–40 weeks₹3,499Shop → 
Morning Freshness · the ₹62-a-month reed line₹749Shop →
SOSA range, specifications and prices used in this guide (verified from the live store, 27 August 2026): Reed diffusers — alcohol-free, phthalate-free, paraben-free and IFRA-compliant compositions on a heat-stable coconut-derived (CCT) carrier, low-VOC, in a refillable glass bottle with six fibre reeds; flip weekly. 50ml lasts 6–8 weeks and 130ml lasts 14–18 weeks; there is no 100ml reed diffuser size. Morning Freshness (Malabar lemon · peppermint · Nilgiri eucalyptus) 50ml ₹749 · 130ml ₹1,249; Garden Bloom (British rose · night-blooming jasmine) ₹799 · ₹1,299; Evening Calm (Kashmir lavender · chamomile) ₹799 · ₹1,299; Fresh Brew (Coorg coffee · Kerala vanilla) ₹849 · ₹1,349; Mountain Breeze (Himalayan pine · sage · Indian cedar) ₹849 · ₹1,349. Duo sets ₹1,498–₹1,598 for 2 × 50ml and ₹2,498–₹2,598 for 2 × 130ml. Oil-only refills 300ml ₹2,399 · 500ml ₹3,499 — the glass vessel and reeds are not included, and replacement reeds are not sold as a separate product. Machines: Boond 300ml ₹899 (~150 sq ft, about 6 hours a fill) · Sukoon 500ml ₹1,899 (270–320 sq ft, 16–18 hours on low, three 15ml fragrances included) · Megh 6L ₹3,499 (~215 sq ft — a runtime and humidity machine that covers less than a Sukoon, never a coverage upgrade) · waterless Vaayu ₹11,999 · Safar ₹3,999 (a car and travel product) · Aangan ₹25,999 · Meenar ₹38,500. The water-based Hotel Collection for ultrasonic machines (15ml ₹299 · 100ml ₹999 · 300ml ₹1,799 · pack of seven 15ml ₹1,799) cannot be used in a reed bottle or a Vaayu. Below ₹749: jar candles ₹379, Sandalwood or Smoked Oudh candle ₹449, wax melts ₹474 (a burner is required and not included), mugs ₹474, bubble and taper candles ₹569, Amber Rose candle ₹599, ceramic trinket dish and candle two-pack ₹664. A reed diffuser adds fragrance to a room. It does not clean, purify or filter air, remove or neutralise cooking, damp or smoke smells, reduce humidity, or change how anyone feels. A reed diffuser adds no moisture to the air; ultrasonic machines work by aerosolising water and therefore do. A persistent musty smell indicates moisture that needs finding and drying, and SOSA sells no dehumidifier or air purifier. Ventilate or extract first; add fragrance second. Evaporation rate rises with warmth and falls with humidity, and airflow carries scent away from the bottle — so performance varies with season, ventilation, ceiling height and room use; longevity figures are typical ranges, not guarantees. Not noticing a constant fragrance is ordinary olfactory adaptation; the reliable checks are leaving the room and returning, or asking someone who has just arrived. Strength figures are positions on SOSA’s own internal scale, not an industry standard. Fragrance oil is flammable — keep bottles away from open flame and out of direct sunlight, and out of reach of children and pets. 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.
About ₹520 a month in the first year, and ₹442 to ₹569 a month from the second — and rather than assert those figures I will derive them, because a budget you cannot check is not a budget. The derivation has four steps. A 2BHK is two sources, not one per room. A 50ml runs 6–8 weeks and a 130ml runs 14–18, which converted honestly is 1.4–1.8 months and 3.2–4.2 months. A Day & Night duo at ₹1,498 plus a 500ml refill at ₹3,499 is ₹4,997 across roughly 36–48 weeks, which is 8.3–11.1 months, which is ₹450–₹602 a month with the middle at ₹515. And because replacement reeds are not sold separately, add roughly ₹62 a month to buy one fresh bottle a year for its reeds. Round the lot and you get ₹520.
Quick answers — read this first
The number. Budget about ₹520 a month for a two-source 2BHK in year one; about ₹442–₹569 a month once you are refilling and no longer buying vessels.Where it comes from. ₹1,498 + ₹3,499 = ₹4,997, covering roughly 36–48 weeks in both rooms — 8.3 to 11.1 months. ₹4,997 ÷ 11.1 ≈ ₹450; ₹4,997 ÷ 8.3 ≈ ₹602.
Two sources, not five. Buy per closed air space you actually sit in. In most 2BHKs that is the living-dining zone and one bedroom — the second bedroom, kitchen and bathroom rarely earn a continuous bottle.
The line people forget. Refills are oil only and replacement reeds are not sold separately, so set aside roughly ₹62 a month — one ₹749 bottle a year — to renew a set of fibre reeds.
The short answer
Short answer: about ₹520 a month, and the purchase that produces it is the Day & Night duo at ₹1,498 now and a 500ml refill at ₹3,499 when the bottles empty. If your second bedroom is mostly shut, run one source instead and budget about ₹267. If someone has told you a 2BHK needs four or five bottles, that is a ₹1,000-a-month plan and you do not need it.
The mechanism: a monthly budget is a weekly product converted badly. Bottles are sold in weeks — 6–8 for a 50ml, 14–18 for a 130ml — and people convert six weeks to "a month and a half" and eight to "two months", which overstates both. Six weeks is 1.385 months and eight is 1.846, because a month is 4.33 weeks. Every figure on this page comes from converting properly and then dividing.
Shop: Day & Night duo ₹1,498 · 2 × 130ml ₹2,498 · Fresh & Grounded duo ₹1,548 · oil refills 300ml ₹2,399 · 500ml ₹3,499. Free shipping above ₹499.
In this guide
Two sources, which is what a 2BHK actually asks for
Day & Night duo · ₹1,498 · 2 × 50ml
Splits into roughly five more fills per bottle — the reason year two costs less
500ml refill · ₹3,499
Bright and dry-woody, meeting on green eucalyptus at the doorway
Fresh & Grounded duo · ₹1,548
Straight answer
What is the realistic monthly figure for a 2BHK?
1. About ₹520 a month in year one. Not a feeling — the output of four divisions, all of which use prices you can read on the product pages.
2. Step one: how many sources. Count closed air spaces you sit still in, not rooms. In most 2BHKs that is two — the living-dining zone and the bedroom you use. Two sources, not four.
3. Step two: convert weeks properly. A month is 4.33 weeks. So 6–8 weeks is 1.385 to 1.846 months, and 14–18 weeks is 3.23 to 4.15 months. Most household budgets go wrong here, by rounding six weeks up to a month and a half.
4. Step three: the year-one purchase. Day & Night duo ₹1,498 gives 6–8 weeks in each of two rooms. A 500ml refill at ₹3,499 splits into 250ml a bottle — five more 50ml fills each, another 30–40 weeks. Total ₹1,498 + ₹3,499 = ₹4,997 for roughly 36–48 weeks, or 8.3–11.1 months. ₹4,997 ÷ 11.1 ≈ ₹450; ₹4,997 ÷ 8.3 ≈ ₹602; the middle, at 42 weeks, is ₹515.
5. Step four: the reed line nobody budgets for. Refills are oil only and replacement reeds are not sold separately. Set aside one ₹749 bottle a year purely to renew a set of fibre reeds: ₹749 ÷ 12 ≈ ₹62 a month. ₹515 rounds with it to about ₹520.
6. Year two is cheaper, by construction. You own the glass, so the year is one ₹3,499 refill across roughly 30–40 weeks of two-bottle running — 6.9 to 9.2 months — which is ₹380–₹507 a month, plus the ₹62 reed line. ₹442 to ₹569.
7. If your second bedroom is shut, halve it. One source is ₹799 + a ₹2,399 refill = ₹3,198 across 42–56 weeks, about ₹267 a month. Spend that instead and do not feel short-changed.
Composed and handmade in small batches in Pune, tested through 45°C summer heat and 85% monsoon humidity; a portion of every order supports girl-child education through Nanhi Kali.
2. Step one: how many sources. Count closed air spaces you sit still in, not rooms. In most 2BHKs that is two — the living-dining zone and the bedroom you use. Two sources, not four.
3. Step two: convert weeks properly. A month is 4.33 weeks. So 6–8 weeks is 1.385 to 1.846 months, and 14–18 weeks is 3.23 to 4.15 months. Most household budgets go wrong here, by rounding six weeks up to a month and a half.
4. Step three: the year-one purchase. Day & Night duo ₹1,498 gives 6–8 weeks in each of two rooms. A 500ml refill at ₹3,499 splits into 250ml a bottle — five more 50ml fills each, another 30–40 weeks. Total ₹1,498 + ₹3,499 = ₹4,997 for roughly 36–48 weeks, or 8.3–11.1 months. ₹4,997 ÷ 11.1 ≈ ₹450; ₹4,997 ÷ 8.3 ≈ ₹602; the middle, at 42 weeks, is ₹515.
5. Step four: the reed line nobody budgets for. Refills are oil only and replacement reeds are not sold separately. Set aside one ₹749 bottle a year purely to renew a set of fibre reeds: ₹749 ÷ 12 ≈ ₹62 a month. ₹515 rounds with it to about ₹520.
6. Year two is cheaper, by construction. You own the glass, so the year is one ₹3,499 refill across roughly 30–40 weeks of two-bottle running — 6.9 to 9.2 months — which is ₹380–₹507 a month, plus the ₹62 reed line. ₹442 to ₹569.
7. If your second bedroom is shut, halve it. One source is ₹799 + a ₹2,399 refill = ₹3,198 across 42–56 weeks, about ₹267 a month. Spend that instead and do not feel short-changed.
Composed and handmade in small batches in Pune, tested through 45°C summer heat and 85% monsoon humidity; a portion of every order supports girl-child education through Nanhi Kali.
TL;DR: about ₹520 a month for a two-source 2BHK in year one, falling to ₹442–₹569 once you are refilling. Derivation: ₹1,498 + ₹3,499 = ₹4,997 over 36–48 weeks (8.3–11.1 months) = ₹450–₹602, plus ₹749 ÷ 12 ≈ ₹62 a month for a fresh set of reeds. One source instead of two is about ₹267.
The purchase the ₹520 is calculated from
SOSA Day & Night duo · Morning Freshness + Evening Calm ₹1,498 / 2 × 50ml
Two 50ml bottles, six fibre reeds each, running 6–8 weeks apiece — the two sources a 2BHK actually asks for. The pairing matters as much as the price: two scents sharing an air boundary must sit within one step of each other or the doorway produces a seam, and bright Morning Freshness beside soft Evening Calm does not. In 2 × 130ml the same duo is ₹2,498 and runs 14–18 weeks a side. Alcohol-free, phthalate-free, paraben-free on a heat-stable coconut-derived CCT carrier, tested through 45°C heat and 85% humidity. Keep both vessels and both sets of reeds: refills are oil only.
Part one — the three inputs the number is built from
A monthly figure is only as good as the three things it is built on: how many sources a flat needs, how long each one lasts converted into months rather than weeks, and what the second purchase costs. Get those three right and the arithmetic is trivial. Get the first one wrong and you will overspend by a factor of two for years.
1
INPUT ONE — SOURCES, COUNTED AS AIR SPACES
A 2BHK is two sources, because fragrance stops at a shut door and thins across an open one
Count the places you shut a door and sit still, then add one for the open zone. In a typical 2BHK that gives two: the living-dining space and the bedroom actually in use. The second bedroom, the kitchen and the bathroom are not usually places anyone stops moving, and a continuous bottle behind a mostly-shut door is money evaporating into an empty room. The exception is a large connected open plan: past roughly 250–300 sq ft with no door anywhere, one bottle scents its own neighbourhood, and two at opposite ends genuinely beat one in the middle — output per bottle is fixed, so the only way to raise a space's total is another source.
The rule: buy per closed air space you occupy, plus one for the open zone. Never one per room on the floor plan.
2
INPUT TWO — WEEKS CONVERTED HONESTLY INTO MONTHS
6–8 weeks is 1.385–1.846 months; 14–18 weeks is 3.23–4.15
Fresh & Grounded₹1,548 · 2 × 50mlA month is 4.33 weeks, so ₹749 ÷ 1.846 ≈ ₹406 a month at the long end and ₹749 ÷ 1.385 ≈ ₹541 at the short end for a single fresh 50ml — and a household that rounded eight weeks to "two months" would have budgeted ₹749 ÷ 2 ≈ ₹375 and come up short every cycle. For a 130ml at ₹1,249 the same conversion gives ₹1,249 ÷ 4.15 ≈ ₹301 and ₹1,249 ÷ 3.23 ≈ ₹387. These are ranges, not guarantees: a warm room finishes a bottle sooner because warmth raises the evaporation rate, and a humid month can lengthen it because humidity slows evaporation from the reed surface. The Fresh & Grounded duo at ₹1,548 converts the same way, ₹100 higher.3
INPUT THREE — THE REFILL RATE, AND THE REED LINE
₹7–8 per ml against ₹15–17, and one ₹749 bottle a year for reeds
A fresh 50ml is roughly ₹15–17 per ml because it includes a glass vessel and six fibre reeds. Refills are oil only — 300ml ₹2,399, 500ml ₹3,499 — at roughly ₹7–8 per ml, which is why the second year of any plan costs less than the first. Split across two running bottles a 500ml is 250ml each, about five 50ml fills apiece, roughly 30–40 weeks. The line most budgets miss: replacement reeds are not sold separately. Reeds are the consumable and the oil is the stable part, so once fibre reeds stop wicking — the wet line barely above the oil, a flip changing nothing — the only source of new ones is a fresh bottle. Budget ₹749 ÷ 12 ≈ ₹62 a month for that and you will never be caught out.
The honest gap: no separately sold reeds. It is a real inconvenience and it belongs in your monthly figure, not in the small print.
Part two — the derivation, five ways of buying
The same 2BHK, bought for in five different ways, each converted to a monthly figure with the division shown. The starred row is the recommendation and the source of the ₹520. Note how far apart the top and bottom rows are: the way you buy matters more to this budget than which scent you choose.
Two sources in a 2BHK, costed five ways
Every monthly figure derived from a published price and a published lifespan
| How you buy | What one cycle costs | Weeks it covers both rooms | The division | Monthly equivalent |
|---|---|---|---|---|
| Duo now, 500ml refill after ★ | ₹1,498 + ₹3,499 = ₹4,997 | 36–48, both rooms | ₹4,997 ÷ 11.1 · ₹4,997 ÷ 8.3 | ₹450–₹602 · middle ₹515 |
| Two fresh 50ml every cycle, never refilling | ₹1,498 per cycle | 6–8 | ₹1,498 ÷ 1.846 · ₹1,498 ÷ 1.385 | ₹811–₹1,081 |
| Two fresh 130ml every cycle | ₹2,498 per cycle | 14–18 | ₹2,498 ÷ 4.15 · ₹2,498 ÷ 3.23 | ₹602–₹773 |
| Steady state, year two onward, oil only | ₹3,499 | 30–40, both rooms | ₹3,499 ÷ 9.2 · ₹3,499 ÷ 6.9 | ₹380–₹507 |
| The reed line, added to any row above | ₹749 once a year | One fresh set of six fibre reeds | ₹749 ÷ 12 | ₹62 |
| Three sources instead of two | Add one bottle and its oil | Same weeks, one more room | Steady state + ₹194–₹250 | ₹574–₹757 |
| The honest caveat: every rupee figure here is a SOSA price from the live store or arithmetic on one, with the division printed beside it. No competing product or brand is named, priced or rated anywhere on this page. Lifespans — 6–8 weeks for a 50ml, 14–18 for a 130ml, 8–11 months for a 300ml refill, 14–18 for a 500ml in a single bottle — are typical ranges rather than guarantees. Warmth raises the evaporation rate so a bottle finishes sooner in a hot room; high humidity slows evaporation from the reed surface, so a monsoon month can feel quieter while the bottle lasts longer; a draught from an AC, a fan or an open balcony does both harms at once, weakening the room and emptying the bottle early. Those are directions of effect, with no rate claimed. The two-bottle refill figures assume both bottles run simultaneously and that you have kept the vessels and the reeds. Reed count is the volume control and bottle size the duration control; a 130ml at six reeds fills the same room as a 50ml and simply does it for longer. There is no 100ml reed diffuser — the sizes are 50ml and 130ml. | ||||
Shop this guide
Two sources, one refill, and the bottle that renews your reeds
Day & Night duo · the two sources a 2BHK needs₹1,498Shop → 500ml refill · 250ml a bottle, 30–40 weeks₹3,499Shop → Morning Freshness · the ₹62-a-month reed line₹749Shop →
The SOSA principle
A monthly budget for a passive product is a weekly product converted, and almost everybody converts it generously in their own favour.
Six weeks is 1.385 months, not one and a half. Do that division honestly twice and the rest of the page is addition.
Part three — when ₹520 is the wrong number for your flat
It is too high if you only genuinely occupy one space. Plenty of 2BHKs have a second bedroom that is a store room with a bed in it, and a bottle behind that door is a bottle scenting nobody. One source, refilled, is ₹799 + ₹2,399 = ₹3,198 across roughly 42–56 weeks — about ₹267 a month, and the flat will not feel worse, because you were never standing in the room the second bottle was serving. Move the single bottle if your habits move. A source in a room you are in beats two split between one occupied room and one empty one, and carrying it costs nothing.
It is too low if your 2BHK is really one large connected volume. If the living, dining and kitchen run together past roughly 250–300 sq ft with no door, that space wants two sources on its own and the bedroom is a third. Three sources in steady state is ₹574–₹757 a month by the table above. At that point it is worth asking what you actually want, because if the answer is scent on demand rather than continuous scent, a Sukoon at ₹1,899 — 270–320 sq ft, 16–18 hours on low, remote, steady/2H/4H timers, three 15ml Hotel Collection fragrances in the box — is a control purchase for exactly that room. It is not cheaper: the water-based fragrance is a consumable at 15ml ₹299, 100ml ₹999 or 300ml ₹1,799, and I publish no per-fill consumption rate for it, so I cannot give you a monthly running figure for a machine the way I can for a bottle.
And there are two things no monthly figure buys. The first is a kitchen or bathroom problem: a reed diffuser adds a fragrance alongside whatever is already in your air, and removes, neutralises and cleans nothing. Cooking smells are answered by the extractor, an open window for ten minutes and then shutting up — fragrance layered over live cooking makes a third smell nobody designed. A musty smell that returns after cleaning is telling you something is still wet, and I sell nothing that addresses that. The second is your own nose: you stop registering a constant in your own home, so the budget question and the "I cannot smell it" question are different questions, and the second is settled by walking in from outside rather than by spending more.
I would rather give you a number you can check than a number that flatters my invoice. Four divisions, all of them public, and if you disagree with one you can rebuild the answer yourself.
— Sonal Sahani, SOSA
Part four — what to order, and what it works out at
Six versions of a 2BHK. Find the one that matches the doors you actually shut; the monthly figure in the last column is the one to put in your budget, not the price in the third.
Six 2BHKs, six monthly figures
What to order this year, the total with the working, and the figure to budget
| Your 2BHK | Sources | What to order this year | Year total, with the working | Budget this a month |
|---|---|---|---|---|
| Living-dining plus one bedroom in use ★ | Two | Day & Night duo ₹1,498 + 500ml ₹3,499 | ₹4,997 over 36–48 weeks, plus ₹749 for reeds | About ₹520 |
| Second bedroom mostly shut and unused | One | Evening Calm ₹799 + 300ml ₹2,399 | ₹3,198 over 42–56 weeks | About ₹267 |
| You hate reordering and want long cycles | Two, in 130ml | 2 × 130ml duo ₹2,498 + 500ml ₹3,499 | ₹5,997 across roughly 41–53 weeks, or 9.5–12.2 months | ₹5,997 ÷ 12.2 ≈ ₹492 · ÷ 9.5 ≈ ₹631 |
| Large open living-dining, no internal door | Three | Fresh & Grounded duo ₹1,548 + one 50ml ₹799 | ₹2,347 of vessels, then oil at ₹194–₹250 a source | About ₹574–₹757 |
| Second year, both vessels and reeds kept | Two | 500ml refill ₹3,499 and nothing else | ₹3,499 over 30–40 weeks, plus the ₹749 reed line | About ₹442–₹569 |
| You want a room scented only when you are in it | Not a bottle count at all | Sukoon ₹1,899, one space, on demand | ₹1,899 plus fragrance from ₹299 | No monthly figure — I publish no consumption rate |
Honest notes for buyers: every rupee figure above is a SOSA price from the live store or arithmetic performed on one with the division shown. No competing product or brand is named, priced or rated here, and no claim is made about how any non-SOSA product performs. Lifespan figures are typical ranges, not guarantees, and move with warmth, airflow and humidity as directions of effect with no rate claimed. Reed count is the volume control and bottle size the duration control; a bigger bottle buys weeks, never metres. There is no 100ml reed diffuser — the sizes are 50ml and 130ml. Replacement reeds are not sold separately and refills are oil only, which is why a reed-renewal line belongs in the budget. No monthly running cost is stated for any machine, because SOSA publishes no per-fill fragrance consumption rate for the Sukoon. The Megh at ₹3,499 covers about 215 sq ft, less than a Sukoon's 270–320, and is a runtime and humidity machine rather than a coverage upgrade; ultrasonic machines add moisture to the air, while a reed diffuser adds none and does nothing to humidity in either direction. Reed oil never goes into a machine and the water-based Hotel Collection never goes into a reed bottle. A reed diffuser adds fragrance to a room; it does not clean, purify or filter air, remove or neutralise any smell, and no claim is made about health, mood, sleep or focus. Fragrance oil is flammable — away from open flame and direct sunlight, on a tray, out of reach of children and pets. Made in Pune; free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
Why the second year is cheaper than the first
SOSA reed diffuser refill · oil only ₹3,499 / 500ml
₹3,499 ÷ 500ml = ₹7.00 per ml against ₹15–17 for a fresh 50ml, because you are no longer buying glass and reeds along with the oil. Split across two running 50ml bottles it is 250ml each — about five more fills apiece, roughly 30–40 weeks — which is the whole of the ₹380–₹507 steady-state figure. The 300ml at ₹2,399 works out at ₹8.00 per ml and suits a single-source flat. Method: lift the reeds onto a paper towel, pour to the neck, return them, flip once so both ends are coated. Gloves on, tray underneath.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
Budget questions used to make me uncomfortable, because the truthful answer to "how much should I spend" is usually less than the person asking expects a founder to say. For a long time I answered them with ranges so wide that they were useless, which is its own kind of dishonesty.
What changed it was writing the conversion down. A month is 4.33 weeks; six weeks is 1.385 months. Once you insist on that one unglamorous division, the whole budget stops being an opinion. Two sources, two published lifespans, one refill price and a line for reeds, and the number falls out at about ₹520 whether or not I like it.
The part I am least comfortable printing is the reed line, because it exists to cover a gap in my own range. I do not sell replacement reeds separately, so once fibre reeds stop wicking you have to buy a whole bottle to get six new ones. That is a real inconvenience and it costs my customers ₹62 a month, so it belongs in the budget rather than in a footnote. Made in small batches in Pune, tested through 45°C heat and 85% humidity, and a part of every order funds a girl's classroom through Nanhi Kali.
Frequently asked questions
How many reed diffusers does a 2BHK need?
Usually two: one for the living-dining zone and one for the bedroom in use. Count closed air spaces you sit still in and add one for the open zone. A large open plan past roughly 250–300 sq ft wants two of its own, making three in total; a second bedroom that is mostly shut wants none.
Why is the monthly figure lower in the second year?
Because year one buys glass and reeds along with the oil and year two buys only oil. A fresh 50ml works out at roughly ₹15–17 per ml; a 300ml refill is ₹8.00 and a 500ml is ₹7.00. Keep the vessels and the reeds and the running figure falls from about ₹520 to ₹442–₹569.
Is a 130ml duo better value than a 50ml duo for a 2BHK?
Per week, slightly: ₹2,498 across 14–18 weeks is about ₹139–₹178 a week for two rooms against ₹1,498 across 6–8 weeks, which is ₹187–₹250. But the monthly figure ends up higher because you are holding more stock at once. Buy the 130ml duo to reorder three times a year instead of eight, not to cover more ground — at six reeds it fills the same rooms.
Should I put a bottle in the kitchen and the bathroom too?
Rarely worth a continuous source. A kitchen has an extractor running and a bathroom usually has an exhaust fan, and both remove scent faster than reeds release it — you would be paying full price for a source that is being ventilated away. For a windowless bathroom, two or three reeds rather than six in a small 50ml is the sensible version, and extraction still comes first.
Can I budget a monthly figure for a Sukoon instead?
Not from anything I publish. The machine is ₹1,899 and its water-based fragrance is 15ml ₹299, 100ml ₹999 or 300ml ₹1,799, but SOSA states no per-fill consumption rate, so any monthly running cost I gave you would be a guess dressed as a figure. Reed diffusers can be budgeted precisely because the lifespans are published; that is a genuine advantage of the format and the reason this page is about bottles.
Reader question · the derived 2BHK budget · 2026
About ₹520 a month in year one, ₹442–₹569 after — derived, not asserted
Two sources, not one per room. ₹1,498 + ₹3,499 = ₹4,997 across roughly 36–48 weeks, which is 8.3–11.1 months, which is ₹450–₹602 with the middle at ₹515 — plus ₹749 ÷ 12 ≈ ₹62 a month to renew a set of reeds, because reeds are not sold separately. One source instead of two is about ₹267. No competing product is named or priced anywhere here, and no monthly running cost is stated for any machine. A reed diffuser adds a fragrance alongside what is already in your air; it does not clean air or remove any smell. Free shipping above ₹499; a portion of every order funds girl-child education through Nanhi Kali.
Day & Night duo ₹1,498 → 500ml oil refill ₹3,499
Continue the read
More on "I don't want to waste money"
- ₹1,000 a month living alone — the same arithmetic with one occupant.
- ₹500 a month, spent well — why the annual figure is the useful one.
- Cost per scented week and what a higher price actually buys.
- When a Sukoon becomes cheaper than several products — the full cost model.
- 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, deriving a realistic monthly home-fragrance budget for a 2BHK from published SOSA prices and published bottle lifespans. No competing product or brand is named, priced or rated, and no claim is made about how long any non-SOSA product lasts or how it performs. Every monthly figure is arithmetic on a live-store price and a stated lifespan range, with the division shown; lifespans are typical ranges rather than guarantees. Warmth, airflow and humidity are given as directions of effect with no rate claimed. No monthly running cost is stated for any machine, because SOSA publishes no per-fill fragrance consumption rate for the Sukoon. Ultrasonic machines add moisture to the air; a reed diffuser adds none and neither reduces nor increases humidity. No claim is made that fragrance cleans air, removes or neutralises any smell, or affects health, mood, sleep or focus. Not noticing a constant fragrance is ordinary olfactory adaptation, described without timescale, percentage or research claim. No climate or air-quality figure is quoted for any city; the only test conditions stated are SOSA's own, 45°C and 85% relative humidity. The situation described is a general one readers may recognise and is not drawn from any customer, forum or third-party discussion.SOSA range, specifications and prices used in this guide (verified from the live store, 27 August 2026): Reed diffusers — alcohol-free, phthalate-free, paraben-free and IFRA-compliant compositions on a heat-stable coconut-derived (CCT) carrier, low-VOC, in a refillable glass bottle with six fibre reeds; flip weekly. 50ml lasts 6–8 weeks and 130ml lasts 14–18 weeks; there is no 100ml reed diffuser size. Morning Freshness (Malabar lemon · peppermint · Nilgiri eucalyptus) 50ml ₹749 · 130ml ₹1,249; Garden Bloom (British rose · night-blooming jasmine) ₹799 · ₹1,299; Evening Calm (Kashmir lavender · chamomile) ₹799 · ₹1,299; Fresh Brew (Coorg coffee · Kerala vanilla) ₹849 · ₹1,349; Mountain Breeze (Himalayan pine · sage · Indian cedar) ₹849 · ₹1,349. Duo sets ₹1,498–₹1,598 for 2 × 50ml and ₹2,498–₹2,598 for 2 × 130ml. Oil-only refills 300ml ₹2,399 · 500ml ₹3,499 — the glass vessel and reeds are not included, and replacement reeds are not sold as a separate product. Machines: Boond 300ml ₹899 (~150 sq ft, about 6 hours a fill) · Sukoon 500ml ₹1,899 (270–320 sq ft, 16–18 hours on low, three 15ml fragrances included) · Megh 6L ₹3,499 (~215 sq ft — a runtime and humidity machine that covers less than a Sukoon, never a coverage upgrade) · waterless Vaayu ₹11,999 · Safar ₹3,999 (a car and travel product) · Aangan ₹25,999 · Meenar ₹38,500. The water-based Hotel Collection for ultrasonic machines (15ml ₹299 · 100ml ₹999 · 300ml ₹1,799 · pack of seven 15ml ₹1,799) cannot be used in a reed bottle or a Vaayu. Below ₹749: jar candles ₹379, Sandalwood or Smoked Oudh candle ₹449, wax melts ₹474 (a burner is required and not included), mugs ₹474, bubble and taper candles ₹569, Amber Rose candle ₹599, ceramic trinket dish and candle two-pack ₹664. A reed diffuser adds fragrance to a room. It does not clean, purify or filter air, remove or neutralise cooking, damp or smoke smells, reduce humidity, or change how anyone feels. A reed diffuser adds no moisture to the air; ultrasonic machines work by aerosolising water and therefore do. A persistent musty smell indicates moisture that needs finding and drying, and SOSA sells no dehumidifier or air purifier. Ventilate or extract first; add fragrance second. Evaporation rate rises with warmth and falls with humidity, and airflow carries scent away from the bottle — so performance varies with season, ventilation, ceiling height and room use; longevity figures are typical ranges, not guarantees. Not noticing a constant fragrance is ordinary olfactory adaptation; the reliable checks are leaving the room and returning, or asking someone who has just arrived. Strength figures are positions on SOSA’s own internal scale, not an industry standard. Fragrance oil is flammable — keep bottles away from open flame and out of direct sunlight, and out of reach of children and pets. 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.