SOSA · The Founder Diaries · Pune Residences
The door you arrive at is the weakest air in the home
Three levels means two staircases in series, and two staircases in series make a chimney with two stages. Everything climbs. Which leaves the entrance — the one place a guest forms an opinion — with nothing.
In a one-level home you plan outward from the middle. In a duplex you plan around the stair. In a three-level home you plan downward, because gravity has already decided what the top will smell like and the only level still in your control is the bottom.

The answer in 30 seconds
Planning Fragrance Across Three Levels in a Panchshil Towers Penthouse
- In one line. One Vaayu at ₹12,499 on the main living level, one Pawan at ₹6,999 dedicated to the entrance, and Pawan behind each bedroom door that is genuinely used.₹12,499
- The short answer. Two stairs in series compound the stack effect. Air leaves the lowest level, passes through the middle and accumulates at the top, so the top level reads strongly without any help and the entrance level reads of almost nothing however much you spend upstairs.
- If you only do one thing: put a small dedicated device at the entrance. It is the cheapest machine in the plan and it fixes the thing people actually notice.
- Do not put the big machine at the door. It feels right and it is wrong — everything it produces will be drawn upstairs within minutes, leaving the hall thin and the top floor overdone.
- Does the top level need anything? Often not, or only in its closed bedrooms. Give it nothing for a fortnight and see. It is receiving the drift from two levels below for free.
- Confirm the format first. Panchshil Towers publishes apartments alongside penthouses at Kharadi, and this page is written only for a genuinely multi-level unit. Check your own drawing before sizing anything.
The answer, in full
Three levels is where the physics stops being a footnote and becomes the entire design. The mechanism is the same one that governs a duplex — warm indoor air is less dense, so it rises through any vertical opening it can find — but in a three-storey home that opening is not one stair, it is two in series, and the effect compounds. Air entering the lowest level is drawn up to the middle. Air at the middle, now joined by what arrived from below, is drawn up to the top. The top has nowhere further to send it, so it accumulates there. What this produces is a home whose fragrance is distributed in precisely the reverse order of its importance. The top level, which in most three-level penthouses is private — bedrooms, a study, perhaps a terrace door — ends up richest. The entrance level, where every visitor forms their first and most durable impression of the home within about four seconds of the door opening, ends up thinnest. And because the owner spends most of their waking time on the middle and upper levels, where the scent is perfectly adequate, the problem is frequently invisible to the one person able to fix it. The correction is not more machine. It is a dedicated device at the entrance whose only job is to hold that small volume against the draw, plus the main machine positioned on the level people actually live on, where it serves its own level first and feeds the one above as a side effect. This arrangement also happens to be cheaper than the instinctive one, because it replaces a second large machine with a small one, and puts the saving into refills that both devices share. A portion of every SOSA order supports girl-child education through Nanhi Kali.
What is published, and what is yours
Published: both formats at this address
Panchshil Towers at Kharadi is publicly listed as offering apartments alongside penthouse residences. This page addresses only the multi-level penthouse arrangement; if your home is a single-floor apartment within the same development, almost none of what follows applies to it.
Yours: the section, the voids, the landing doors
How the three levels connect, whether each stair is open to the room it rises from or enclosed, whether any landing has a door that can be shut, and what the entrance volume actually measures. The section drawing answers all of this and the floor plans answer none of it, which is why I ask for the section first on a home like this.
On three levels, the section drawing is worth more than all three floor plans.
Planning downward
Start at the top, and probably spend nothing there
Counting from the top is not where the money goes; it is where you work out how little is needed. The upper level receives the accumulated drift from both levels below, so its open landing and lounge are usually already well served. What is not served is any bedroom with its door shut, because a closed door stops fragrance regardless of how much is in the corridor outside it. Those rooms, and only those rooms, take a Pawan each.
The middle: where the main machine belongs
In most three-level plans the middle is the principal living level — living, dining, kitchen, perhaps a family room. This is Vaayu's place. It serves the level it stands on, and what it loses upward is not wasted because it is topping up the level above. Position it away from the foot of the upper stair so the air has somewhere to settle before it is drawn off.
The entrance: the level everyone forgets
The lowest level is usually the smallest — an entrance hall, a lift lobby, perhaps a guest room or a study. It is also the level being drained continuously by two stairs above it, and the level where arriving guests form their impression. A dedicated Pawan here at ₹6,999 is, in my view, the highest-return single purchase in a three-level home. It is a small volume, so a room device holds it comfortably, and it is working against the draw rather than feeding it.

Three levels, three jobs
| What the record says | |
|---|---|
| Entrance level | One SOSA Pawan, ₹6,999. Published for one suitable room up to about 500 sq ft. Small volume, continuously drained by the stairs above, highest visible return in the home. |
| Living level | One SOSA Vaayu, ₹12,499, or ₹12,999 hotel-inspired. Published for up to 1,000 m³ of one connected zone. Position away from the foot of the upper stair. |
| Upper level | Usually nothing for the landing and lounge, which receive the drift. One Pawan per closed bedroom that is genuinely slept in. |
| Refills | ₹1,049 for 100 g, ₹1,849 for 300 g, shared across every machine in the home. Three devices, one oil shelf. |
| What none of it does | No terrace, no deck, no open balcony on any level. No odour removal at source, no air purification, no Wi-Fi and no control from outside the home. |
“On three levels, spend the smallest sum at the lowest point. That is where the home is judged.”
Building it in the right order
- Get the section drawing out and mark both stairs and any open voids.
- Measure the entrance volume and the main living volume separately, in metres, heights included.
- Put a Pawan at the entrance first, before anything else, and live with it for a week.
- Add a Vaayu on the main living level, positioned away from the upper stair foot.
- Give the top landing nothing. Add Pawan only to upper bedrooms actually in use.
- If a landing door exists, close it while the living level runs and note the difference before buying anything more.
SOSA for Pune residences
Lowest level, smallest machine, biggest difference
Vaayu holds the living level. Pawan holds the entrance against the draw of two staircases. The top floor is already getting yours for free.
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 PawanView SOSA VaayuQuestions, answered
Why does my entrance smell of nothing when the rest of the home is fine?
Should the big machine go at the front door?
Does the top level need its own machine?
Can each level have a different scent?
Why do you want the section drawing rather than the floor plans?
My unit is an apartment here, not a penthouse. Does this apply?
If you would rather ask a person
Send the section, not the plans
For a three-level home I want to see how the levels connect before anything else. Send the section drawing and I will mark where each device should stand, including the levels that need none. A portion of every SOSA order supports girl-child education through Nanhi Kali.
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