Second: the 140–180 sq ft master bedroom, on low with the 2H timer.
The exception: if the flat is empty from morning to evening, or somebody works behind a bedroom door all day, that room comes first.
2. The master bedroom second. It is where a fragrance stops being decoration and becomes private, and at 140–180 sq ft it sits comfortably inside a single machine's rating on the lowest setting with the 2H timer.
3. Not the guest room, however much you like the idea. A room used three or four times a year is the most expensive person in home fragrance — the guest who might come. Give it a reed diffuser from ₹749 and spend the machine money on hours you actually live.
4. The exception is occupancy, and it is common. If the flat is empty from nine until eight, or somebody works eight hours behind a bedroom door, the room with the person in it comes first. Fragrance you are awake for is fragrance you experience.
5. Name the two rooms you are leaving out, then cover them cheaply. A reed duo set at ₹1,598 takes the total to ₹5,396 and gives every room in the flat something, which is a better-scented 3BHK than three machines and one empty room.
A portion of every order supports girl-child education through Nanhi Kali.
Why the living/dining goes first
Priority questions are usually settled by argument rather than evidence, so it is worth setting out the three things that actually decide this one. They are hours, impression and volume, and in a 3BHK all three point at the same room. The interesting part is the fourth consideration — occupancy — which is the only one that ever overturns the result, and it overturns it for a recognisable kind of household rather than at random.
The priority order by household
The same four-room flat, six households, and the two rooms I would give the machines to in each. Find the row that describes your ordinary week rather than your best one — the aspirational answer is what leads people to scent a guest room and live in a quiet sitting room.
| Your household | First machine | Second machine | What the other rooms get |
|---|---|---|---|
| Standard family, home in the evenings ★ | Living / dining | Master bedroom | A reed duo set at ₹1,598 — ₹5,396 all in, every room given something |
| Couple out of the house from morning to evening | Master bedroom | Living/dining, on the 4H timer from the moment you get home | Reeds, and a 300ml refill before a third machine |
| Somebody works from home behind a bedroom door | That room, on low with the 4H timer | Living / dining | The master waits — it is the room with the fewest conscious hours in this household |
| Family of five, all three bedrooms slept in | Living / dining | Master bedroom | Buy the third at ₹5,697 sooner rather than later; the fourth only if the last room is genuinely lived in |
| You entertain often, or run a home business from the flat | Living / dining, placed centrally at 90–120cm | Master bedroom | A candle from ₹379 in the guest bathroom on the evening itself |
| Large open living-dining that thins out at the ends | Living / dining, raised and centred first | Master bedroom | If it still thins out, that room is a Vaayu question rather than a second Sukoon question |
Sukoon · the two rooms that win₹1,899Shop → 
Reed diffuser · the rooms that waitfrom ₹749Shop → 
Hotel Collection · 7 scentsfrom ₹299Shop →
When the master bedroom should come first
I would rather give you the exception properly than pretend the rule is universal, because the exception covers a great many urban households. If the flat is empty from nine in the morning until eight at night, your living/dining is not holding most of your conscious hours at all — it is holding two of them, between dinner and bed, while the master bedroom holds the wind-down, the reading, the getting ready in the morning and the weekend lie-in. In that household the master bedroom is the room with the attention in it, and the first machine belongs there. It is also the easier room to do well: 140–180 sq ft against a 270–320 sq ft rating means the machine runs on low with the 2H timer, a 500ml tank lasts most of a week, and the St. Regis-inspired — amber, violet and woods — is comfortable behind a shut door in a way it would be tiring in a room you also cook next to.
The stronger version of the same argument is the home office, and it is the one case where I would put the first machine in a bedroom without hesitating. Somebody sitting behind a closed door from nine to six experiences more fragrance in a fortnight than a master bedroom delivers in a season, because most bedroom hours are unconscious ones. A 100–140 sq ft room behind a door is easy work for a 500ml unit at 30–50 ml/h — run it on low with the 4H timer, place it across the desk rather than beside the screen, and choose something dry: the 1 Hotels-inspired, cedarwood, vetiver and green leaves, holds up across eight working hours where anything sweeter starts to feel like company you did not invite. If two people in your home work behind two different doors, that is the honest case for three machines rather than a rearrangement of two.
There are two other situations worth naming. The first is a household where somebody sleeps badly or has strong preferences about their room — a person who genuinely notices what their bedroom smells like should have the machine that room deserves, and no priority table outranks that. The second is a very open living-dining, 450–500 sq ft running into the entrance and the corridor, where the honest position is that one machine will hold the middle and thin out at the ends however well you place it. In that flat I would put the first machine in the master bedroom, where ₹1,899 finishes a room completely, and treat the living-dining as a separate decision to be made later — raised and centred placement first, and if that fails, a waterless Vaayu at ₹11,999 rated for up to 1000m³ of connected space rather than a second and third ultrasonic unit chasing the same air. What I would not do in any of these households is buy two machines and put them both in the room you happen to be standing in when the delivery arrives.
The SOSA 3BHK edit
The priority order as a shopping list. The first line is the decision this article is about; everything under it exists so the two rooms you did not choose are not simply ignored.
| Buy | What it does | When it earns its place | Price |
|---|---|---|---|
| 1. Two Sukoons ★ | The living/dining first and the master bedroom second — 270–320 sq ft each, six 15ml scents between them | Now. Swap the order if your household is out all day or works from a bedroom | ₹3,798 |
| 2. Reed duo set | The two bedrooms that lost — a corner rather than a room, no socket, no routine | The same week. ₹5,396 in total, and no room left with nothing | ₹1,598 |
| 3. A third Sukoon | The bedroom that gains a person; nine 15ml scents across the flat | The week a desk moves in, a child stops sharing or a parent arrives | ₹1,899 |
| 4. 300ml refill | Your everyday scent across both tanks at roughly ₹6 per ml | After a month, once one of the six included bottles has won | ₹1,799 |
| 5. Scented candle / Boond 300ml | Light as well as fragrance on the evening a guest stays; a bathroom at the right scale | Finishing touches, once the rooms you live in are handled | from ₹379 / ₹899 |
| Not this: a machine in the guest room | A 500ml tank running to an empty bed most weeks | Never as one of your first two. It is the least-used air in the flat | ₹1,899 |
Versailles
The reason I answer this question so often is that a 3BHK is the first home where buying two machines means actively leaving two rooms out, and people find that uncomfortable enough to spread the money thinly instead. They put one machine in a bedroom nobody uses because it felt unfair to skip it, and the flat ends up with a beautifully scented spare room and a sitting room that smells of the afternoon.
Give the machines to the hours, not to the doors. In most homes that is the living/dining first and the master bedroom second, and in a home that is empty all day it is the master bedroom first — and if somebody works behind a bedroom door from morning to evening, that room outranks both. Then spend ₹1,598 on a reed duo set so the two rooms you skipped are not simply bare, and let the third machine wait for the week one of them gains a person. Buying two machines properly and two rooms cheaply is a better flat than three machines and an empty room, and it is ₹301 less.
Everything is made and supported from Pune, and a part of every order funds girl-child education through Nanhi Kali. You get a home that smells like somewhere you chose; a girl gets a classroom. That equation has always felt right to me.
Frequently asked questions
- Where should you place two Sukoons in a 3BHK? — the placement mechanics for a pair.
- Are two Sukoons enough for a 3BHK? — the households that can honestly stop at two.
- How many Sukoons should you buy for a 3BHK? — the counting method, by size and layout.
- The complete SOSA Sukoon buying guide for a 3BHK — the pillar guide.
- Brand: the SOSA founder story.
Facts verified August 2026: SOSA Sukoon — 500ml tank, 2.4MHz ultrasonic cool mist, 270–320 sq ft coverage, 16–18 hours runtime on low and 9–12 on high, 30–50 ml/h mist output, 7-colour LED, remote and steady/2H/4H timers, BPA-free ABS with auto shut-off and overheat protection, ~17cm high — ₹1,899, including three 15ml Hotel Collection fragrances of your choice. Boond 300ml ₹899; Megh 6-litre ₹3,499. Hotel Collection water-based fragrance 15ml ₹299, 100ml ₹999, 300ml ₹1,799, Pack of 7 × 15ml ₹1,799; 100ml and 300ml refills from ₹999. Seven scents: The Ritz-Carlton-inspired (white tea, bergamot, cedar), Westin-inspired (white tea, aloe, cedar), 1 Hotels-inspired (cedarwood, vetiver, green leaves), The St. Regis-inspired (amber, violet, woods), Shangri-La-inspired (jasmine, green tea, white tea), Four Seasons-inspired (citrus, floral, sandalwood), W Hotels-inspired (citrus, pepper, amber). Waterless systems for larger and connected spaces: Vaayu ₹11,999 (up to 1000m³), Aangan ₹25,999 (8,000–10,000 sq ft), Meenar ₹38,500 (12,000–18,000 sq ft). The Hotel Collection scents are SOSA's own interpretations; SOSA is not affiliated with or endorsed by any hotel brand. Prices subject to change — see the live product pages.