Upstairs: deep into the bedroom, near the bed, away from the door onto the landing.
Nowhere: the staircase, the landing, a mezzanine rail, or directly under a split AC.
2. Two machines at opposite ends, not two side by side. In an open ground floor, separation is what produces an even room. Two Sukoons a few feet apart give you one loud patch; the same two at opposite ends give you a room.
3. About a metre off the floor. A console, a sideboard, a low shelf. Mist disperses outward and settles downward, so a machine on the floor spends its output on the skirting. Leave a foot of clear space around it so mist does not condense on a wall or curtain.
4. Upstairs, deep into the room. Bedrooms receive borrowed scent through the doorway from the landing, so a machine placed near that door piles fragrance where there is already some. Put it on the far side of the room, near the bed rather than the entrance.
5. Never on the stairs, the landing or a gallery rail. All three are moving air or shared air. A staircase carries fragrance away; a gallery over a double-height room is the top half of the room below and is already scented by it.
Made in India, composed by an ISIPCA Versailles-trained perfumer — and a portion of every order supports girl-child education through Nanhi Kali.
Every downstairs placement is also an upstairs decision
In a single-floor home, placement is a question about one room: get the machine away from the draught, off the floor, out of the corner where a curtain will absorb the mist, and the job is done. A duplex adds a second axis. There is a continuous, gentle upward current through the stairwell — warm air from the ground floor rising because the house is warmer at the bottom and there is a vertical path — and the strength of that current at any given point on your ground floor depends on how close you are to the stairs. Position is a dial. Put a diffuser two metres from the stair foot and a large share of its output is upstairs within the hour: the landing smells lovely, the sofa smells of very little. Put the same machine in the opposite corner and the room holds it, while a soft trace still finds its way up.
That gives you a control most people never use. If your upstairs feels heavy in the evenings, you probably do not need to change fragrance or reduce drops — you need to move a ground-floor machine further from the stairs. If your upstairs feels flat, move one closer. The same reasoning inverts on the first floor: the landing doorway is the point at which borrowed scent enters a bedroom, so a machine standing near that door is stacking new fragrance exactly where old fragrance is arriving, which reads as a strong doorway and a thin bed. Place upstairs machines as deep into their rooms as the furniture allows and the two supplies meet in the middle instead of piling up at the entrance.
The three placement decisions
SOSA Sukoon₹1,899Start from the staircase and walk away from it. The best position in a duplex is the far corner of the living-dining, roughly a metre off the floor, with clear air around it. If you run two Sukoons down here — and most duplexes should — put them at opposite ends of the space rather than in the same half. Keep both out of the kitchen's line, away from the front door, and out of the direct throw of a ceiling fan or split AC, which relocates mist rather than spreading it. A ground-floor study or guest room takes the third machine, and that one is easy: a door that shuts makes placement forgiving.The placement map, both floors
Position by position, with the reason attached — because the reason is what lets you adapt it to your own layout. Coverage ratings assume a closed room without a strong draught, so an open stairwell, a fan or an open window all reduce what a well-placed machine achieves.
| Space | Put it here | Not here | Why |
|---|---|---|---|
| Open living-dining ★ | Far corner from the stairs, a metre up | Beside the staircase | The stair foot exports scent upward |
| Open living-dining, second machine | Opposite end of the room | Within a few feet of the first | Separation makes a room; proximity makes a patch |
| Double-height living room | Seating height, low furniture | A high ledge or gallery rail | The upper layer drains into the stairwell |
| Ground-floor study or guest room | Anywhere a metre up, door shut | In the doorway | A closed door holds fragrance almost completely |
| Master bedroom, upstairs | Far wall, near the bed | Beside the landing door | Borrowed scent already arrives at the door |
| Small upstairs bedroom | Boond ₹899 on a bedside table | A Sukoon at full drops | 150 sq ft is the right size for the room |
| Staircase, landing, gallery | Nothing | Any machine at all | Moving air, borrowed air, and nobody stands still |
| Airflow beats everything: a machine in the throw of a ceiling fan or a split AC will produce a strong wall and a flat room whatever else you get right. And for more area, add another Sukoon — never a Megh, which costs ₹3,499 and is rated to 215 sq ft against the Sukoon's 270–320. The Megh is a hundred-hour runtime and humidity machine for one dry room. | |||
Sukoon · the main positions₹1,899Shop → 
Boond · small bedroom₹899Shop → 
Hotel Collection · the scentFrom ₹299Shop →
Height, distance and when each floor runs
Height is the same everywhere in the house and people still get it wrong: about a metre off the floor, on furniture rather than on the ground, with a hand's width of clear air on every side. Mist that hits a wall, a curtain or the back of a sofa condenses instead of dispersing, which is a slow and invisible way to waste fragrance. The one exception to "higher is better than lower" is a double-height room, where higher is actively wrong — there, a metre is a ceiling rather than a floor, and anything above sofa height is being released into air that is leaving.
Distance is the duplex-specific variable. Downstairs, measure it from the staircase: further is better, and the far corner of the open area is the best seat in the house. Between two machines on the same floor, further apart is better, because you are building an even layer rather than a strong point. Upstairs, measure it from the bedroom door: further into the room is better. Then set the drops to match — three to four per tank downstairs where you are replacing a constant loss, and two to three upstairs where the room already carries a trace of the ground floor.
Schedule ties it together. Run the ground-floor machines on a two-hour timer from late afternoon, which gives the stairwell time to carry a soft version upstairs before anyone goes to bed, and run bedroom machines for an hour before sleep. If the upstairs reads heavy, move a downstairs machine further from the stairs before you touch the drops. If a bedroom reads flat, move its machine deeper into the room. Rinse tanks between fragrances, use filtered water in hard-water cities, and never put raw essential or carrier oil into an ultrasonic machine — it will foul the misting plate.
What it costs when placement is not enough
Repositioning is free and should always be tried first. When it genuinely is not enough, this is the arithmetic — and every Sukoon includes three 15ml Hotel Collection fragrances of your choice.
| Setup | What you get | Covers | Total |
|---|---|---|---|
| The free fix ★ | Move what you own — away from the stairs, a metre up, deep into bedrooms | Usually the whole problem | ₹0 |
| One more, well placed | 1 × Sukoon ₹1,899 for the far end of the open area | Evens out a large ground floor | ₹1,899 |
| The ground floor done | 3 × Sukoon at ₹1,899 · includes 9 × 15ml scents | Open living-dining + one closed room | ₹5,697 |
| Both floors | 4 × Sukoon at ₹1,899 · includes 12 × 15ml scents | Duplex to ~2,000 sq ft | ₹7,596 |
| A small upstairs room too | 4 × Sukoon ₹7,596 + Boond ₹899 | Adds a 150 sq ft bedroom | ₹8,495 |
| Running cost | A 100ml refill from ₹999, or 300ml ₹1,799 (~₹6/ml) | Months across four machines | from ₹999 |
Versailles
I visited a house in Kalyani Nagar where the owner had six machines and was convinced she needed an eighth. Five of the six were within three metres of the staircase, because that is where the plug points were. The house was scenting its own landing beautifully and nothing else.
We moved four of them and turned two off. It cost nothing and the difference was obvious the same evening. I think about that visit whenever someone asks me which machine is stronger, because strength was never the variable — the building was taking the fragrance away faster than any machine could supply it, and the only fix was to stop standing next to the exit.
Walk your ground floor away from the stairs and put the machines at the end of that walk. Walk into each bedroom past the door and put those machines there. Then leave the stairs, the landing and the gallery entirely alone. A portion of every order goes to girl-child education through Nanhi Kali.
Frequently asked questions
- Best floor-by-floor diffuser setup for a duplex — the itemised kit list.
- Scenting a staircase and double-height living room — volume, not area.
- Should both floors of a duplex smell the same? — the stairwell blend, answered.
- Placement mistakes that waste half your fragrance — the general rules.
- Brand: the SOSA founder story.
SOSA products & prices (verified August 2026): Hotel Collection water-based ultrasonic diffuser fragrance 15ml ₹299 · 100ml ₹999 · 300ml ₹1,799 · Pack of 7 (15ml, all fragrances) ₹1,799; refills 100ml 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). Diffusers: Boond 300ml ₹899 · Sukoon 500ml ₹1,899 · Megh 6L ₹3,499. Water-based, phthalate-free, composed to IFRA standards for home diffusion; 3–6 drops per tank. Made in India, Pune. The Hotel Collection scents are SOSA's own interpretations inspired by the world's finest hotels; all hotel names are trademarks of their respective owners and are used only to describe the scent style — SOSA is an independent Indian fragrance house, not affiliated with or endorsed by any hotel brand. Prices and availability subject to change — see the live product pages.