SOSA · The Founder Diaries · Hyderabad Homes
Two levels.
One volume, or two?
A duplex is sold as one home on two levels. Whether it behaves as one room or two for fragrance depends on a single detail of the plan: what sits between the levels.
Look at the opening between your two levels before you look at any machine. A void and an open stair make one tall room. A closed stair makes two homes, stacked.

Part of the SOSA guides for Hyderabad homes. See also पवन Pawan for a single enclosed room.
The answer in 30 seconds
What does a duplex need?
- Find the opening. A double-height void or an open stair joins the levels into one volume. A stair behind a door does not.
- If the levels share air, size one zone device on the whole joined volume. Height counts as much as floor.वायु Vaayu
- If they do not, plan each level on its own. Often a zone device below and a room device above.पवन Pawan
- Bedrooms are separate either way. A closed door is a closed door on any level.
The detail that decides everything
Owners often ask me whether one diffuser can cover both levels of a duplex, and expect a yes or a no. The honest answer is a question back: when you stand in your living room and look up, what do you see? If you see the upper level, a gallery, a balustrade, a stair rising through open space, your two levels are one large room with a mezzanine in it. If you see a ceiling, they are two rooms.
This matters because fragrance fills volume, not floor area. A living room open to the level above can hold close to double the air its footprint suggests, and a machine chosen for the footprint will seem weak. It is not weak. It has been asked to scent a room twice the size anyone measured.
The opposite case is simpler, and more common than brochures imply: a staircase tucked behind a wall or a door, with an upper level of bedrooms and perhaps a family lounge. Here very little moves between the levels, and the upper floor needs its own decision. I would never assume which kind a particular duplex is from its name or its listing. Ask for the section drawing, or simply stand in the room.
| How to read your own duplex | |
|---|---|
| Open to above | Measure the lower floor, then the full height to the upper ceiling over the void, and add the open part of the upper level. That total is the volume. |
| Closed stair | Measure each level separately. They are independent zones and can run on different schedules. |
| The upper lounge | If it overlooks the living room, it belongs to the same volume. If it sits behind the stair door, it is its own room. |
| Bedrooms | One room each. पवन Pawan is published for one suitable room up to about 500 sq ft. |
| Where the machine sits | On the lower level, near where air already circulates. Not boxed in beneath the stair. Check the manual for the clearances your unit needs. |
| The terrace | Outside the scope of both machines. Treat them as indoor devices. |

Which machine goes where
In a duplex whose levels share air, one zone device on the joined volume is usually the whole answer for the social part of the home, and a room device takes the master bedroom. In a duplex whose levels are closed off, the lower level gets the zone device if it is a large connected living and dining run, and the upper level often needs nothing more than a room device in the bedroom you use.
The mistake to avoid is a zone device on each level by default. On a floor of bedrooms it is far more machine than the rooms can take. Both machines use the same SOSA waterless oils, so you can begin with one and add the other without wasting anything.
“Stand in the living room and look up. If you can see the upper level, you have one tall room, and it should be measured as one.”
Setting it up
- Stand in the living room and look up. Decide whether the levels are joined or separate. Everything else follows from this.
- Get the real heights. Ask your designer or builder for the section drawing, or measure. Do not rely on a brochure figure.
- Work out the volume in cubic metres. Length by width by height for each connected part, added together.
- Compare it with the published figure. वायु Vaayu is published for up to 1,000 m³ of a suitable connected zone. If you are close to it, write to us before ordering.
- Run the social zone when it is used. Choose a run window that matches the evening, not the whole day.
- Give each bedroom its own timer. Upstairs and downstairs rarely keep the same hours.
वायु and पवन · for a home on two levels
Measured in cubic metres, because a duplex has height
वायु Vaayu breaks undiluted oil into a dry mist with cold air, with no water and no heat. Published for up to 1,000 m³ of a suitable connected zone · waterless · freestanding, wall-mounted or into an HVAC return · 400 ml tank · app and timer · key-lock · under 38 dB.
Its coverage is published as a volume, which is exactly the measure a home with a void needs.
पवन Pawan takes a bedroom on either level. One room up to about 500 sq ft · plugs straight into the socket · silent · app and timer · 200 ml of oil included · 1-year warranty.
Current prices and oil sets are on each product page.
See वायु VaayuSee पवन PawanDuplex homes in Hyderabad
Duplex layouts in Hyderabad mostly sit inside larger apartment communities and are easy to miss in a listing. NCC Urban Gardenia near Gachibowli is listed with five-bedroom duplex apartments alongside its standard homes, and Prestige Vaishnaoi Rainbow Waters at Raidurgam with duplex layouts among its larger residences.
Named as examples of the format, not as installations. Whether a given duplex has a void, an open stair or a closed one differs from unit to unit, and the plan that matters is your own. SOSA has no affiliation with either community.
Questions, answered
Can one diffuser cover both levels of a duplex?
How do I know whether my two levels share air?
Why does my double-height living room seem under-scented?
Where should the machine go in a room that is open to above?
Is Vaayu too much for a duplex bedroom?
Can the two levels run on different schedules?
Continue in the SOSA guides
If you would rather ask a person
Tell us what you see when you look up
Send us the floor dimensions in metres, the height over the living room and a photograph taken from the sofa. We will tell you whether you have one volume or two, and what each needs.
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