★ Ultrasonic Diffuser Guides
SOSA cool-mist diffusers — low wattage, cheap to run all night
★★★★★
"Bought the Sukoon for my AC bedroom. It runs the whole night on low, the 7-colour light is a lovely night light, and the remote means I set the timer from bed. Came with three hotel-inspired fragrances so I used it the first evening."
Sukoon 500ml Diffuser
★★★★★
"The Boond lives on my work desk - tiny, USB-powered, whisper-quiet. A little cool mist and a soft glow while I work, and it switches off on its own when empty. Best ₹799 I have spent for my cabin."
Boond 300ml Mini Diffuser
★★★★★
"Megh has a 6-litre tank and honestly lasts for days. Our living room was bone-dry from the AC and this fixed it - quiet, one simple dial, and it doubles as an aroma diffuser with the SOSA fragrance."
Megh 6L Diffuser
★★★★★
"What sold me: it is made for the SOSA water-based fragrance. I had clogged my old diffuser with thick essential oils - this mists cleanly and the Four Seasons-inspired scent is gorgeous. I just add a few drops to the tank."
SOSA Diffuser + Hotel Collection
★★★★★
"Got the Sukoon for my kid's room - BPA-free, cool mist so no burn risk, auto shut-off. The soft colour light doubles as a night light. I feel safe leaving it on."
Sukoon 500ml Diffuser
★★★★★
"Bought a diffuser and three 300ml refills as a set. Ships fast, honest pricing, and a bit of every order goes to girl-child education. The whole house smells like a five-star lobby now."
SOSA Diffuser + Hotel Collection
★★★★★
"Bought the Sukoon for my AC bedroom. It runs the whole night on low, the 7-colour light is a lovely night light, and the remote means I set the timer from bed. Came with three hotel-inspired fragrances so I used it the first evening."
Sukoon 500ml Diffuser
★★★★★
"The Boond lives on my work desk - tiny, USB-powered, whisper-quiet. A little cool mist and a soft glow while I work, and it switches off on its own when empty. Best ₹799 I have spent for my cabin."
Boond 300ml Mini Diffuser
★★★★★
"Megh has a 6-litre tank and honestly lasts for days. Our living room was bone-dry from the AC and this fixed it - quiet, one simple dial, and it doubles as an aroma diffuser with the SOSA fragrance."
Megh 6L Diffuser
★★★★★
"What sold me: it is made for the SOSA water-based fragrance. I had clogged my old diffuser with thick essential oils - this mists cleanly and the Four Seasons-inspired scent is gorgeous. I just add a few drops to the tank."
SOSA Diffuser + Hotel Collection
★★★★★
"Got the Sukoon for my kid's room - BPA-free, cool mist so no burn risk, auto shut-off. The soft colour light doubles as a night light. I feel safe leaving it on."
Sukoon 500ml Diffuser
★★★★★
"Bought a diffuser and three 300ml refills as a set. Ships fast, honest pricing, and a bit of every order goes to girl-child education. The whole house smells like a five-star lobby now."
SOSA Diffuser + Hotel Collection
✓ Ships in 24 hrs from Pune · replacement if damaged in transit ✓ Cool mist, no heating element · auto shut-off when empty ✓ SOSA water-based fragrance only - random oils clog the mist plate
Founder Diaries · Ultrasonic Diffuser Guides
How much does it cost to run overnight? Very little - these draw the kind of power a small LED or phone charger does, not the hundreds of watts a heater or AC pulls. It is one of the cheapest appliances to leave on.
Which is the most economical? The Boond, since it runs off USB power like a small gadget. But all three are inexpensive to run; wattage is not a reason to choose between them.
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.
This is a practical worry, especially if you plan to run a diffuser all night, so let me put your mind at ease with the honest facts. No, ultrasonic diffusers do not use much electricity at all. They are low-wattage devices - closer to a night light than a heater - which is exactly why they are so cheap to leave running. Here are the real numbers for the SOSA range.
Quick answers — read this first
Do ultrasonic diffusers use a lot of electricity? No. They are low-wattage devices. The Boond is USB-powered, the Sukoon runs at around 12W, and the Megh runs on a standard adapter. Running one all night costs very little compared with a heater or air conditioner.How much does it cost to run overnight? Very little - these draw the kind of power a small LED or phone charger does, not the hundreds of watts a heater or AC pulls. It is one of the cheapest appliances to leave on.
Which is the most economical? The Boond, since it runs off USB power like a small gadget. But all three are inexpensive to run; wattage is not a reason to choose between them.
The short answer
The honest answer: no - they are low wattage. Boond is USB-powered, Sukoon is about 12W, Megh runs on a standard adapter.
Compared with: a heater or AC pulls hundreds to thousands of watts; a diffuser sips power like a night light or phone charger.
Running overnight: cheap - leaving one on all night costs a tiny fraction of running a heater or AC for the same time.
Most economical: the Boond (₹799), which runs off USB - but all three are inexpensive to run.
In this guide
Illustrative only. Match tank and runtime to the room: Boond for a desk, Sukoon for a bedroom, Megh for a living room or dry winter air.
Straight answer
Do ultrasonic diffusers use a lot of electricity?
No, honestly they do not - they are among the cheapest appliances you can leave running. An ultrasonic diffuser only has to vibrate a tiny plate and run a small fan, so the power draw is low. In the SOSA range, the Boond is USB-powered, so it sips power like any small USB gadget or phone charger; the Sukoon runs at around 12 watts on a roughly 24V adapter, which is night-light territory; and the Megh runs on a standard household adapter and is still a low-wattage device for its tank size. To put that in perspective, a room heater or air conditioner pulls hundreds or thousands of watts. So leaving a diffuser on all night costs a tiny fraction of what those cost, and electricity is really not a reason to hesitate.
Short version: no - low wattage. Boond is USB, Sukoon about 12W, Megh on a standard adapter. Cheap to run all night versus a heater or AC.
Want a low-power scent you can leave on all night?
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The honest wattage numbers
I would rather give you the actual figures from our units than a vague reassurance. Here is what each SOSA diffuser draws, straight from the specifications.
Boond (300ml) - USB-powered. It runs off a USB port, so it draws the kind of small power a USB gadget or phone charger does. You can even run it from a power bank. This is the most economical of the three.
Sukoon (500ml) - around 12W. It runs at roughly 12 watts on a 24V adapter. That is comparable to a small LED bulb - night-light territory - and it is the unit most people leave on overnight.
Megh (6L) - standard adapter. The large-tank Megh runs on a standard household adapter and remains a low-wattage device despite its size, which is how it manages up to 100 hours of running.
The reason the numbers are so low is simple physics: an ultrasonic diffuser does no heating. All the electricity goes into vibrating a small plate and running a quiet fan. There is no heating element - the single most power-hungry component in appliances like heaters and kettles - which is why a cool-mist diffuser costs so little to run.
How it compares to other appliances
The clearest way to feel how little a diffuser uses is to line it up against the appliances you already run. The gap is enormous.
| Appliance | Rough power draw |
|---|---|
| SOSA Boond diffuser (USB) | Very low - USB gadget level |
| SOSA Sukoon diffuser | Around 12 watts |
| Small LED bulb | Roughly 9-12 watts |
| Room heater | 1000-2000 watts |
| Air conditioner | Hundreds to thousands of watts |
In other words, a diffuser sits down at the LED-bulb end of the scale, while heaters and air conditioners live at the opposite, expensive end. Leaving a Sukoon on all night uses roughly what leaving one small light on would - a rounding error next to your AC bill.
The myth: "A diffuser that runs all night must cost a fortune in electricity."
The reality: it is one of the lowest-wattage things in your home, because it does no heating. All three SOSA units are cheap to run overnight, and electricity is not a sensible reason to avoid one.
The reality: it is one of the lowest-wattage things in your home, because it does no heating. All three SOSA units are cheap to run overnight, and electricity is not a sensible reason to avoid one.
And unrelated to power but always worth repeating: use only SOSA's water-based Hotel Collection fragrance, since raw essential oils can clog the plate. Use filtered or RO water in hard-water cities, and never hot water - these are cool-mist units with no heating element, which is exactly why they use so little power.
No heating element means no big electricity bill. A diffuser costs about what a night light costs to run - leave it on and enjoy the scent.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.
SOSA range
3 ultrasonic diffusers + the water-based Hotel Collection refill
| 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 |
SS
ISIPCA
Versailles
Versailles
A note from Sonal
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
Is it expensive to run a diffuser all night?
No. These are low-wattage devices - the Sukoon runs at around 12 watts, roughly a small LED bulb, and the Boond runs off USB. Leaving one on overnight costs a tiny fraction of running a heater or AC.
Which SOSA diffuser uses the least electricity?
The Boond, since it is USB-powered and sips power like a small gadget. But all three are inexpensive to run, so power draw is not a real reason to pick one over another.
Why do diffusers use so little power?
Because they do no heating. All the energy goes into vibrating a small plate and running a quiet fan. There is no heating element, which is the component that makes heaters and kettles so power-hungry.
Can I run the Boond from a power bank?
Yes - it is USB-powered, so a power bank or laptop USB port works, which is part of why it suits a desk, travel or a hostel room.
Does running the Megh's big tank cost more electricity?
No - despite the 6-litre tank, it is still a low-wattage device on a standard adapter. The tank size affects how long it runs, not how much power it draws at any moment.
Ready to choose
SOSA ultrasonic diffusers — cool-mist, humidifier + aroma in one, each with 3 hotel-inspired fragrances
Boond ₹799 (300ml desk), Sukoon ₹1799 (500ml, 7-colour light, remote + timers), Megh ₹3499 (6L, up to 100 hrs). Cool mist, auto shut-off, made for Indian homes. Use SOSA water-based Hotel Collection fragrance only - raw oils can clog the mist plate. Ships in 24 hours from Pune.
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Editorial standards & sources
About this guide: Written by Sonal Sahani, ISIPCA Versailles-trained founder and perfumer at SOSA Home & Body. Product recommendations reflect the SOSA range; the buying criteria apply to any brand. "Best" is presented as a checklist, not a universal verdict. Sensitivity to fragrance is individual; this is general information, not medical advice.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.