SOSA · The Founder Diaries · Pune Residences
Warm air only goes one way
The Hillside residences are listed at five and a half bedrooms across two levels. The moment a home has a staircase, the staircase becomes the single most important thing in the fragrance plan — and almost nobody accounts for it.
Put one machine in the lower living room of a duplex and you will scent the upper landing beautifully, while the room the machine is standing in reads as almost nothing. That is not a fault in the machine. That is the stair doing what stairs do.
The answer in 30 seconds
Home Fragrance for a Duplex Residence at The Balmoral Hillside: Planning Two Levels
- In one line. Treat the two levels as two homes joined by a chimney. Vaayu ₹12,499 for the lower connected zone, Pawan ₹6,999 for each closed room upstairs.₹12,499
- The short answer. In a duplex the stair void is not a corridor, it is a flue. Warm indoor air rises through it and carries fragrance with it, which means a single machine on the lower level under-serves the room it occupies and over-serves the upper landing. Plan the lower level as one connected zone and the upper level room by room, behind its doors.
- If you only do one thing: stand at the bottom of your stair on a warm afternoon and hold a tissue loosely at head height. If it drifts towards the stair, your fragrance will do the same.
- Why not one big machine? Because Vaayu's published figure of up to 1,000 m³ is for a connected zone, and in a duplex the stair makes the two levels connected in one direction only. Air goes up. It does not come back down on request.
- So what is the sensible build? One Vaayu positioned on the lower level away from the stair foot, plus Pawan in the master and in whichever upstairs rooms are genuinely slept in. Typically two machines, sometimes three.
- One caution specific to Hillside. The published portfolio describes 4.5 and 5.5 bedroom residences; any separate penthouse designation is variant-specific. Plan from your own unit drawing, not from the tier name on the brochure.
The answer, in full
There is a piece of building physics that decides more about fragrance in a duplex than any choice of scent, and it has a dull name: the stack effect. Warm air is less dense than cool air, so it rises. In a single-floor flat it rises to the ceiling, spreads sideways and comes back down at the walls, which is why one well-placed machine can hold a room. In a duplex it rises into the stair void and keeps going, because there is somewhere for it to go. The result is a home that behaves exactly backwards from how people expect. Guests arriving downstairs notice the fragrance less than the family does walking along the upper landing, and the owner concludes the machine is weak when in fact it is being drained upwards at a steady rate all day. The fix is not a bigger machine. A bigger machine on the lower level simply pushes more scent up the stair, faster. The fix is to stop treating a duplex as one volume. Plan the lower level as a zone in its own right, position the machine so the stair foot is not the nearest opening to it, and give the upper level its own small devices behind the doors where people actually sleep. This is also, incidentally, the cheaper answer. A second Vaayu for the upper landing would be money spent scenting a circulation space nobody sits in, while two Pawans in the rooms that are used cost less together than one more large machine and put the fragrance where a person is lying down to notice it. A portion of every SOSA order supports girl-child education through Nanhi Kali.
What is published about these residences, and what is yours
Published: the format and the configuration
The Hillside residences at Baner are publicly described in the developer's portfolio as 4.5 and 5.5 bedroom homes, with the larger configuration listed as a duplex. Two levels and five-plus bedrooms is the fact this page is built on, because it is the fact that introduces the stair. Where a listing additionally describes a unit as a penthouse, treat that as specific to the variant and confirm it against your own documentation.
Yours: the stair position, the void, the heights
Where the staircase lands on each level, whether the void is open to the living room or enclosed behind a wall, the ceiling height on both levels, and whether the upper level has its own terrace door. Every one of those changes the plan, none of them is published, and all of them are on your drawing.
An open stair void and an enclosed stair are two different homes.
Planning two levels
The lower level: one zone, placed away from the stair
Foyer, living and dining usually breathe together down here, and that is a single zone for one Vaayu. Position matters more than it does in a flat: put the machine at the far end of the run from the stair foot, so that the air it scents has some room to settle before it reaches the opening that will take it upstairs. Measure the zone in metres including the stair void if the void is open, because that volume is real and it counts against the published 1,000 m³.
The upper level: rooms, not a landing
Upstairs in a 5.5-bedroom duplex is almost always bedrooms and a lounge off a landing. The landing needs nothing — it will already be receiving the drift from below. The bedrooms need their own, because a closed bedroom door stops fragrance completely. Pawan is the device for this: ₹6,999, straight into a wall socket, silent enough for a room someone is sleeping in, and it ships with 200 ml of oil as two separate 100 ml scents, so the master and a guest room need not be identical.
The half room
The “.5” in a 5.5 configuration is usually a study, a lounge or a family room that is open rather than doored. If it is open to the landing, it belongs to the upstairs drift and needs nothing of its own. If it closes, it is a room, and it gets its own Pawan or it gets nothing.
Pawan and Vaayu across two levels
| What the record says | |
|---|---|
| Lower zone | SOSA Vaayu, ₹12,499, or ₹12,999 for the hotel-inspired scent sets. Published for up to 1,000 m³ of one connected zone, Bluetooth app and timer. Include the stair void in your volume if it is open. |
| Upper rooms | SOSA Pawan, ₹6,999 each. Published for one suitable room up to about 500 sq ft. Plug-in, waterless, silent, app and timer, ships with 200 ml of oil as two 100 ml scents, one-year warranty. |
| Shared refills | ₹1,049 for 100 g and ₹1,849 for 300 g. Both machines are waterless nebulisers and take the same oils, so a two-level home keeps one set of refills rather than two. |
| The landing | Nothing. It receives the drift from the lower zone for free, and a machine there would be scenting a space nobody sits in. |
| What neither does | Neither scents an open terrace or balcony, removes odour at its source, or purifies air. There is no Wi-Fi, no control from outside the home and no automatic scent switching. |
“A bigger machine downstairs does not fix a duplex. It just sends more of your money up the stairs.”
Building it in the right order
- Check the drift: a tissue held at head height at the stair foot on a warm afternoon.
- Measure the lower zone in metres, including the stair void if it is open to the living area.
- Place one Vaayu at the far end of that zone from the stair foot, not beside it.
- Put a Pawan in the master and in each upstairs room that is genuinely slept in.
- Give the landing nothing and see how it reads for a week before adding anything.
- Time the lower zone to your evenings and the bedrooms to the hour before sleep, rather than running either continuously.
SOSA for Pune residences
Two levels, two different jobs
Vaayu holds the lower zone. Pawan holds a room behind a closed door. The stair between them is why you need both rather than two of one.
SOSA Pawan ₹6,999 · SOSA Vaayu ₹12,499, ₹12,999 hotel-inspired · waterless refill oils ₹1,049 for 100 g, ₹1,849 for 300 g
View SOSA VaayuView SOSA PawanQuestions, answered
Can one Vaayu cover both floors of a duplex?
Why is the upstairs stronger than the room the machine is in?
Do I include the stair void when measuring for Vaayu?
Is Pawan quiet enough for a bedroom?
Can the two levels have different scents?
Is this advice specific to a penthouse variant?
If you would rather ask a person
Send me the section, not just the plan
For a duplex I would rather see the section drawing than the floor plan, because the stair void is where the answer lives. Send both if you have them and I will tell you where the machine should stand. A portion of every SOSA order supports girl-child education through Nanhi Kali.
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