What size for a bedroom? The Sukoon (500ml) covers roughly 270 to 320 sq ft and runs 16 to 18 hours, so it comfortably scents a bedroom through the night.
What size for a living room? The Megh (6L) is the large-room choice, with an adjustable mist dial, up to 100 hours per fill and enough output for a living room or dry AC air.
Room by room: desk, bedroom, living room
SOSA makes three cool-mist diffusers on purpose, because one size never fits every room honestly. Here is where each belongs.
Boond, 300ml, ₹799 - the desk and bedside pick. USB-powered, whisper-quiet, up to about 6 hours per fill, with a soft colour night light, covering roughly 150 sq ft. This is the one for a work desk, a bedside table, a hostel room or a small cabin. In those spaces it is perfect; in a hall it would be lost.
Sukoon, 500ml, ₹1799 - the bedroom pick. Coverage of 270 to 320 sq ft, 16 to 18 hours per fill, a 7-colour LED, a remote and 2-hour and 4-hour timers. It runs the whole night, you set it from bed, and the light doubles as a night light. This is the one most homes should start with.
Megh, 6L, ₹3499 - the living-room and whole-home pick. A 6-litre tank running up to 100 hours, an adjustable mist dial from 60 to 350 ml/hour, and a quiet ~35 dB. This is the large-room and dry-air choice: living rooms, open-plan spaces, and AC or winter dryness where you want it going for days without refilling.
Tank, coverage and runtime, and how they trade off
Three numbers tell you almost everything about whether a diffuser fits a room.
My rule of thumb: buy for the room you will use it in most, not the biggest room in the house. An oversized diffuser refilled rarely is fine; an undersized one that never fills the space just disappoints you daily.
All three are cool mist with no heating element, all have auto shut-off when the tank empties, and all three ship with three water-based Hotel Collection fragrances so you can scent from day one. Use only SOSA's water-based Hotel Collection fragrance in these diffusers. Raw essential oils, perfumes and carrier oils are too thick or solvent-heavy, so they can clog the ultrasonic misting plate and damage the unit. Fill with clean, room-temperature water (filtered or RO in hard-water cities to avoid mineral white dust), never hot water. The mist is cool, with no heat, and it scents a room rather than purifying the air.
The SOSA range
SOSA makes three cool-mist ultrasonic diffusers for different rooms, each arriving with three of our water-based Hotel Collection fragrances so you can scent from day one. Prices and headline specs below are live from the SOSA store. Whichever you choose, use only the SOSA water-based fragrance - raw essential or carrier oils can clog the misting plate.
| Diffuser / refill | Character | Best for | From |
|---|---|---|---|
| Boond (300ml mini) | USB · up to 6 hrs · colour night light · ~150 sq ft | Desk, bedside, hostel | ₹799 |
| Sukoon (500ml) | 16-18 hrs · 7-colour LED · remote + 2H/4H timers · 270-320 sq ft | Bedroom, study, nursery | ₹1799 |
| Megh (6L) | Up to 100 hrs · adjustable mist dial · ~35 dB · large-room humidifier | Living room, dry AC, winter | ₹3499 |
| Hotel Collection fragrance | Water-based refill · 7 hotel-inspired scents · 15/100/300ml | Refill for any SOSA diffuser | ₹299 |
Versailles
I trained as a perfumer at ISIPCA in Versailles, but half the questions we get are not about scent at all - they are about the machine. Indian rooms are bone-dry from AC and winter, and most gadget diffusers are too small, too loud, or quit by midnight. So we made three: Boond (300ml, desk), Sukoon (500ml, bedroom, with a remote and mood light) and Megh (6L, whole-room), each shipping with three of our fragrances.
They are cool-mist ultrasonic diffusers - an ultrasonic plate turns water into a fine, cool mist with no heating element, so there is no boiling water or burn risk, and each has an auto shut-off when the tank runs dry.
One thing I say on every listing and will say here: use only SOSA's water-based Hotel Collection fragrance. Raw essential oils, perfumes and carrier oils are thick or solvent-heavy and can clog the misting plate and damage the unit. A few drops of our water-based fragrance in the tank mists cleanly and scents the whole room.
Frequently asked questions
Facts verified June 2026: SOSA makes three cool-mist ultrasonic diffusers: Boond (300ml, USB, colour night light, up to 6 hrs, ~150 sq ft, ₹799), Sukoon (500ml, 7-colour LED, remote + 2H/4H timers, up to 16-18 hrs, 270-320 sq ft, BPA-free, ₹1799) and Megh (6L, adjustable mist dial, ~35 dB, up to 100 hrs, ₹3499). Each is cool mist (no heating element) with auto shut-off, ships with 3 water-based Hotel Collection fragrances (15ml ₹299 / 100ml ₹999 / 300ml ₹1799), and is made for Indian AC-dry and winter air. Use SOSA water-based fragrance only; raw essential or carrier oils can clog the ultrasonic misting plate. Composed in India; a portion of every order supports Nanhi Kali girl-child education. These are independent, hotel-inspired fragrance interpretations created by SOSA. SOSA is not affiliated with, endorsed by or associated with the hotels named; all hotel names are trademarks of their respective owners and are used only to describe the scent style.