★ SOSA for Smart Homes
Set-and-forget is four decisions made once - here is exactly what they are
★ ★ ★ ★ ★
★★★★★
"My reception now smells like a five-star lobby. Guests comment on it before they even reach the desk."
SOSA Vaayu · lobby scenting
★★★★★
"Zero dampness, which was my worry in monsoon. The mist is completely dry and the scent carries across the whole salon."
SOSA Vaayu · spa & salon
★★★★★
"Set the timer once and forgot about it. Runs only during store hours, refills last weeks. Exactly what I wanted."
SOSA Vaayu · showroom
★★★★★
"Our old water diffuser couldn't fill the living-dining. This one does the whole floor and you can't hear it running."
SOSA Vaayu · large home
★★★★★
"The app scheduling is the best part - strong in the mornings, gentle in the evening. Clinic feels calm all day."
SOSA Vaayu · wellness studio
★★★★★
"Paired it with the SOSA hotel oils. The projection is genuinely lobby-strength - nothing like a plug-in."
SOSA Vaayu · workspace
★★★★★
"My reception now smells like a five-star lobby. Guests comment on it before they even reach the desk."
SOSA Vaayu · lobby scenting
★★★★★
"Zero dampness, which was my worry in monsoon. The mist is completely dry and the scent carries across the whole salon."
SOSA Vaayu · spa & salon
★★★★★
"Set the timer once and forgot about it. Runs only during store hours, refills last weeks. Exactly what I wanted."
SOSA Vaayu · showroom
★★★★★
"Our old water diffuser couldn't fill the living-dining. This one does the whole floor and you can't hear it running."
SOSA Vaayu · large home
★★★★★
"The app scheduling is the best part - strong in the mornings, gentle in the evening. Clinic feels calm all day."
SOSA Vaayu · wellness studio
★★★★★
"Paired it with the SOSA hotel oils. The projection is genuinely lobby-strength - nothing like a plug-in."
SOSA Vaayu · workspace
★ The machine, set once, forgotten
SOSA VaayuOne schedule, set onceView ₹11,999
SOSA VaayuA second zone, same scheduleView ₹11,999
SOSA AngaanA whole house on the HVACView ₹25,999
✓ 400ml tank lasts up to 75 days - one refill reminder, not a daily routine ✓ Bluetooth app, 1h/4h/8h/24h timers, adjustable intensity - set once, runs itself ✓ Made in India · independent, not affiliated with any hotel · a portion funds girl-child education
Founder Diaries · Home Scenting Guides · Smart Homes
How often does a set-and-forget fragrance machine need attention? Mainly at refill time. A SOSA Vaayu (₹11,999) 400ml tank lasts up to about 75 days depending on intensity and run hours, so a calendar reminder for the refill is the only ongoing task once the schedule and intensity are set.
Can a set-and-forget system work across a whole home? Yes, by running one fragrance and one schedule across every machine rather than a different setting per room. A second SOSA Vaayu for a separate zone, or a SOSA Angaan (₹25,999) for a whole house on the HVAC, both follow the same four-decision approach.
See the SOSA Vaayu Book a scenting plan
Facts verified 24 August 2026 against the live SOSA product pages: the SOSA Vaayu (₹11,999) is a waterless cold-air nebuliser rated to 1000m³, approximately 2,000-3,000 sq ft, with a 400ml refillable tank lasting up to about 75 days, a Bluetooth app with 1h/4h/8h/24h timers and adjustable intensity, and operation under 38dB. The SOSA Angaan (₹25,999) is an HVAC nebulising diffuser rated to 3,000m³, roughly 8,000-10,000 sq ft, with an 800ml reservoir, metal body, programmable schedules and operation under 42dB. Scent enhances the ambience and perceived quality of a space; it works alongside proper ventilation and cleaning and is not a substitute for either, and SOSA makes no claim that fragrance alone influences a purchase decision. The hotel-inspired scents are SOSA's own original interpretations; SOSA is an independent brand and is not affiliated with, or endorsed by, any hotel named for reference. Coverage, fragrance usage and running cost depend on the space, settings and hours of use, and are confirmed on a consultation. Prices and availability are subject to change - see the live product pages.
A set-and-forget fragrance system is not a feature you buy - it is four ordinary decisions made once, deliberately, so that nothing is left for you to remember between refills.
Quick answers — read this first
How do I create a set-and-forget fragrance system for my home? Make four decisions once: one daily schedule of a few hours morning and evening, one intensity started lower than feels right, one fragrance run in every machine, and a refill reminder in your calendar. SOSA Vaayu (₹11,999) runs all four on its own Bluetooth app.How often does a set-and-forget fragrance machine need attention? Mainly at refill time. A SOSA Vaayu (₹11,999) 400ml tank lasts up to about 75 days depending on intensity and run hours, so a calendar reminder for the refill is the only ongoing task once the schedule and intensity are set.
Can a set-and-forget system work across a whole home? Yes, by running one fragrance and one schedule across every machine rather than a different setting per room. A second SOSA Vaayu for a separate zone, or a SOSA Angaan (₹25,999) for a whole house on the HVAC, both follow the same four-decision approach.
The short answer
Short answer: make four decisions once - one schedule of a few hours morning and evening, one intensity started low and held for a week, one fragrance across every machine, and a refill reminder for the roughly 75-day tank life - and SOSA Vaayu (₹11,999) runs all four on its own Bluetooth app with nothing further required.
The pick: the SOSA Vaayu (₹11,999) with the schedule and intensity set once, stepping up to the SOSA Angaan (₹25,999) for a whole house on the HVAC.
Next step: tell us your rooms and we will help set the schedule and intensity from day one - book a free scenting plan.
In this guide
Set-and-forget is not a feature of the machine. It is four settings made once, deliberately, so there is nothing left to remember day to day.
The shortlist - tap either machine
Set it once
SOSA Vaayu · ₹11,999
For a whole house
SOSA Angaan · ₹25,999
Get the settings checked
Free scenting plan
Straight answer
What does it actually take to build a set-and-forget fragrance system at home?
Four decisions, made once. One schedule: a few hours in the morning and a few in the evening, set on the SOSA Vaayu (₹11,999) Bluetooth app and then left alone - running 24 hours a day is not necessary and uses more oil for no real benefit. One intensity: start lower than feels right, because your own sense of the right level adapts within days, and hold that setting for at least a week before touching it again. One fragrance: choose a single scent and run it in every machine across the home rather than mixing different fragrances room to room, so the house reads as one considered decision instead of several competing ones. And a refill reminder: the 400ml tank lasts up to about 75 days depending on intensity and run hours, so a single recurring calendar entry is the entire maintenance this system needs. Vaayu has a Bluetooth app with 1h/4h/8h/24h timers and adjustable intensity, plus an auto-stop and a key-lock. It runs the same schedule every day, unattended, whether anyone is home or not. For a whole house sitting on one HVAC loop, SOSA Angaan (₹25,999) follows the same four decisions at a larger scale, with an 800ml reservoir stretching the refill interval further. Do this once, properly, and the system genuinely disappears into the background - which is the entire point. A free scenting plan will help set the schedule and intensity correctly from day one, and a portion of every order supports girl-child education through Nanhi Kali.
Four decisions, made once: one schedule (hours, not all day), one intensity (start low, hold a week), one fragrance (everywhere), and a refill reminder for the roughly 75-day tank. Then genuinely forget it.
The machine built for this is SOSA Vaayu - waterless, under 38dB, rated to 1000m³ (about 2,000-3,000 sq ft), with a 400ml tank lasting up to 75 days and a Bluetooth app running 1h/4h/8h/24h timers. Set it once, put a refill reminder in your calendar, and that is the whole system.
See the SOSA Vaayu ₹11,999 Book a scenting plan
Set once
Schedule, intensity and fragrance - one decision each
The machine behind a system you never think about
One machine builds the whole system for most homes. A second unit extends it to another zone; Angaan extends it to a whole house on one HVAC loop.
A home or floor, up to about 3,000 sq ft
SOSA Vaayu
Waterless cold-air nebuliser rated to 1000m³. Bluetooth app, 1h/4h/8h/24h timers, adjustable intensity, 400ml tank lasting up to 75 days. The whole system in one machine.
From ₹11,999
A second zone, the same four decisions
SOSA Vaayu (second unit)
A second Vaayu for a genuinely separate zone, set to the same schedule, intensity and fragrance as the first.
From ₹11,999
A whole house on one HVAC loop
SOSA Angaan
HVAC nebulising diffuser rated to 3,000m³, with an 800ml reservoir and programmable schedules, under 42dB. The same four decisions, at house scale.
From ₹25,999
The four settings that make it genuinely forgettable
Three of the four decisions are about restraint - fewer hours, lower intensity, one fragrance - and the fourth is simply remembering a refill date.
1
The schedule and intensity decisions
Fewer hours, lower intensity, set once
A few hours in the morning and a few in the evening beats running 24 hours a day, both for cost and for how the fragrance actually reads to a visitor. Start the intensity lower than feels right on day one - your own sense of the right level adapts within days - and hold whatever you set for a full week before changing it again.
Tip: Resist adjusting anything for the first week, even if it feels too light at first.
Vaayu's 1h/4h/8h/24h timers and adjustable intensity make both decisions a single app session.
See SOSA Vaayu →
2
The fragrance decision
One scent, in every machine, everywhere
Running a different fragrance in each room defeats the purpose of a set-and-forget system, because it becomes something to manage rather than something to ignore. Pick one scent and order it for every machine in the house, including a second zone or floor, so the whole home reads as one decision.
A whole house on Angaan's single HVAC loop makes the one-fragrance rule automatic by design.
See SOSA Angaan →
3
The refill decision
One calendar entry, and nothing else to remember
A 400ml Vaayu tank lasts up to about 75 days depending on intensity and run hours. Put a recurring reminder in your calendar at that interval, and there is genuinely nothing else this system asks of you between refills - no app to check, no bottle to remember, no caretaker to rely on.
Tip: Set the refill reminder the same day you set the schedule, so it is never forgotten.
Vaayu's 400ml tank and up-to-75-day life is the only maintenance interval in the whole system.
See SOSA Vaayu →
The SOSA principle
A set-and-forget system is not something the machine does for you. It is four decisions you make once, carefully, so that nothing is left to decide again.
The forgetting is the reward for the deciding. Skip the deciding and there is nothing to forget - just a schedule you keep tweaking.
What set-and-forget actually means with SOSA Vaayu
Here is the whole system laid out as four rows - decide each once, and the fifth column is simply time passing.
The SOSA plan
The four set-and-forget decisions, one table
| Decision | What to set, once |
|---|---|
|
Schedule
|
A few hours morning and evening, not 24 hours a day. View → |
|
Intensity
|
Start lower than feels right; hold it a week before adjusting. View → |
|
Fragrance
|
One scent, run in every machine across the home. |
|
Refill
|
A calendar reminder at the tank's roughly 75-day interval. View → |
Once the system is set, the discipline that keeps it right over time is covered in can a luxury home automatically smell amazing every day. And if you are still deciding where to mount the machine in the first place, how do I add automatic fragrance to a smart home covers that step by step.
Four decisions. Made once.
SOSA Vaayu ₹11,999 - set the schedule, the intensity, the fragrance and a refill reminder, then genuinely forget it.
Set-and-forget is not a feature of the machine. It is four decisions made once, carefully, so there is nothing left to remember.
— Sonal Sahani, SOSA
Forgotten until the reminder
One recurring calendar entry, nothing else
The SOSA set-and-forget specification
Vaayu builds the whole set-and-forget system for a home or floor; Angaan extends it to a whole house on one HVAC loop. Both waterless, both made in India. A portion of every order supports girl-child education through Nanhi Kali.
The SOSA set-and-forget specification
Two machines, four decisions each
| Machine | Best for | Why it works | Price |
|---|---|---|---|
|
SOSA Vaayu
|
A home or a single floor up to about 3,000 sq ft | 400ml tank up to 75 days, Bluetooth app and timers, under 38dB | ₹11,999 View → |
|
SOSA Angaan
|
A whole house on one HVAC loop | 800ml reservoir, programmable schedules, under 42dB | ₹25,999 View → |
The most common mistake is treating this as a machine to keep adjusting rather than four settings to make once. A free scenting plan will help you land on the right schedule and intensity from day one.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
"Set-and-forget" gets used loosely, so let me be precise about what it actually means with SOSA Vaayu (₹11,999): it means four decisions made once, carefully, so that nothing is left for you to remember day to day. It has a Bluetooth app with 1h/4h/8h/24h timers and adjustable intensity, plus an auto-stop and a key-lock. It runs the same schedule every day, unattended, whether anyone is home or not.
The four decisions are ordinary. Pick one schedule - a few hours in the morning and a few in the evening, not 24 hours a day - and set it on the app once. Pick one intensity, starting lower than feels right, and hold it for a week before touching it again; your own sense of "right" adapts within days, so trust the lower number. Pick one fragrance and run it in every machine in the house, rather than mixing scents room to room, so the whole home reads as one considered decision. And put a refill date in your calendar - a 400ml tank lasts up to about 75 days depending on intensity and run hours, so a recurring reminder is the only maintenance this system needs.
Do those four things once and you genuinely can forget it - no app to check daily, no bottle to remember, nothing depending on a caretaker's memory. That is the real meaning of automation here: not that it thinks for itself, but that it needs nothing further from you once it is set. Made in India, and a portion of every order supports girl-child education through Nanhi Kali.
Frequently asked questions
What does a set-and-forget fragrance system actually involve?
Four decisions made once: a daily schedule of a few hours morning and evening, an intensity started low and held for a week, one fragrance used in every machine, and a refill reminder for the roughly 75-day tank life on SOSA Vaayu (Rs 11,999).
How often do I need to check on a set-and-forget fragrance machine?
Mainly at refill time. Once the schedule and intensity are set, a SOSA Vaayu needs no daily attention - just a calendar reminder for the refill, which comes around roughly every 75 days depending on use.
Should I use a different fragrance in different rooms?
For a set-and-forget system, no - one fragrance across every machine keeps the whole home reading as one considered decision rather than something to manage room by room.
How do I choose the right intensity for a set-and-forget system?
Start lower than feels right on day one, since your own sense of the correct level adapts within days of continuous exposure. Hold whatever you set for at least a week before making any further adjustment.
Does a set-and-forget system need an internet connection?
No. SOSA Vaayu and Angaan run on a Bluetooth app or onboard schedule, with no wifi or cloud account required, so the system keeps running on its own schedule with no connectivity dependency at all.
Four decisions. Made once. Then forgotten.
SOSA — Smart Home Scenting the set-and-forget system, step by step
SOSA Vaayu (₹11,999) runs the whole system on a Bluetooth app for a home or floor; SOSA Angaan (₹25,999) does the same for a whole house on the HVAC. Made in India, and a portion of every order supports girl-child education through Nanhi Kali.
Book a free scenting plan → SOSA Vaayu · ₹11,999
One more look before you decide
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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 planning advice applies to any brand.Facts verified 24 August 2026 against the live SOSA product pages: the SOSA Vaayu (₹11,999) is a waterless cold-air nebuliser rated to 1000m³, approximately 2,000-3,000 sq ft, with a 400ml refillable tank lasting up to about 75 days, a Bluetooth app with 1h/4h/8h/24h timers and adjustable intensity, and operation under 38dB. The SOSA Angaan (₹25,999) is an HVAC nebulising diffuser rated to 3,000m³, roughly 8,000-10,000 sq ft, with an 800ml reservoir, metal body, programmable schedules and operation under 42dB. Scent enhances the ambience and perceived quality of a space; it works alongside proper ventilation and cleaning and is not a substitute for either, and SOSA makes no claim that fragrance alone influences a purchase decision. The hotel-inspired scents are SOSA's own original interpretations; SOSA is an independent brand and is not affiliated with, or endorsed by, any hotel named for reference. Coverage, fragrance usage and running cost depend on the space, settings and hours of use, and are confirmed on a consultation. Prices and availability are subject to change - see the live product pages.