The Air Purifier

Built for Little Lungs

$629.00
A Sereniby peacefully circulating clean air through a baby's crib
A baby playing happily on the floor with a Sereniby and crib in the background
A top-down view of a baby happily looking at her Sereniby.
A mother gazing lovingly at her baby with Sereniby facing his bassinet in the background.
A top-down view of a Sereniby device

From Our Family to Yours

The founders of Sereniby look at each other before the birth of their first child.

As expecting parents, we read the research about how important clean, circulating air is for babies...

American Academy of Pediatrics Logo

"Children spend 80% to 90% of their time indoors and therefore are frequently exposed to pollutants in indoor air."

Columbia University Medical Center Logo

“Children's lungs are especially sensitive to the harmful effects of air pollution."

New England Journal of Medicine Logo

"… improvements in air quality were associated with statistically and clinically significant positive effects on lung-function growth in children."

Stanford University Logo

“Air Pollution Puts Children at Higher Risk of Disease in Adulthood”

Harvard University Logo

"Studies suggest that PM 2.5 [airborne particulates small enough to penetrate the lungs] can hinder children’s neurological development…"

Kaiser Permanente Logo

"Keep your baby’s sleeping room well ventilated…. Good air circulation: Reduces the chance of carbon dioxide buildup."

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“Fan use during sleep was associated with a 72% reduction in SIDS risk”

We searched and searched for the right air purifier, but none of the options felt good enough. So we set out to create Sereniby. 

Babies Need Clean Air 👶

Sereniby purifies & circulates the air where your baby sleeps, supporting healthy development & safe, restful sleep 

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By Parents, For Families

Crafted with care to meet the unique needs of babies — and those who care for them.

Medical-Grade HEPA Purification

Eliminates impurities up to 5x more effectively than standard filters — because your baby deserves it.

Designed with Safety in Every Detail

Innovative, patent-pending design circulates air where your baby sleeps while keeping little hands safe.

Precision Sensors Protect Every Breath

Constantly monitor air quality and temperature, standing guard to ensure a healthy environment during this critical stage of growth.

Smart Features for Better Rest

Sleep-friendly night lighting, white noise, and “set it and forget it” controls bring peace to the whole family.

An Investment In Your Child's Health

Powerful, energy-efficient, and configurable, Sereniby grows with your child to provide clean air wherever it’s needed most.

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Free Shipping

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30-Day Risk-Free Trial

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2-Year Warranty

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Parent-Approved Support

Medical-Grade Purification

We hold our air to the highest standard — the same trusted by neonatal intensive care units.

With a custom-engineered, True HEPA filtration system, Sereniby eliminates viruses, pollution, wildfire smoke, and other harmful impurities up to 5x more effectively than standard home air filters. Because your baby deserves nothing less than the purest air.

Sereniby Purifying Nursery Fan placed beside a baby crib, ensuring clean air circulation.

Every Detail Crafted with Safety in Mind

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Evenly circulates air to help battle CO2 build-up, keeping baby’s air fresh & clean

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Hidden fan blades keep little hands safe

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Thoughtfully designed anti-tip & power-cord management provide added security

Precision Sensors Protect Every Breath 

🦠 When it comes to healthy air, the smallest particles have the biggest impact.

🔬 These microscopic impurities are extraordinarily challenging to measure accurately — and most air purifiers don’t even try.

👩‍🍼 But when it comes to your baby's health, you're not deterred by challenges, and neither is Sereniby. 

👩🏽‍🔬 That's why we hold your little one's air to the highest standards, using the same precision technology trusted by scientists and global health experts.

A baby peacefully looking up. Her Sereniby is positioned next to her crib, monitoring her air quality.

👉 Learn More About Indoor Air Quality

What are PM2.5 particles, and why should I care?

The air we breathe contains microscopic particles — about 30 times smaller than a grain of sand — known as PM2.5.

Surprisingly, indoor air is often far more polluted than outdoor air, making it essential to monitor what your family breathes at home.

How strict are the standards for PM2.5 exposure?

The World Health Organization (WHO) recommends keeping average PM2.5 exposure below 5 micrograms per cubic meter — an extraordinarily strict limit.

That’s roughly the equivalent of 5 tiny specks of dust floating in a space the size of a baby’s crib.

How can I know if my baby’s air meets these standards?

Measuring PM2.5 to this level of precision is no small feat, requiring science-grade instruments capable of continuous measurement — as levels can spike unpredictably throughout the day.

That's why most air purifiers don’t measure air quality, and those that do rarely offer transparent PM2.5 readings — instead relying on vague "clean air" metrics with no clear link to global health standards.

What makes Sereniby different?

When it comes to your baby’s air, transparency and precision are essential. 

That’s why Sereniby uses next-generation laser sensors and proprietary detection algorithms to deliver real-time PM2.5 readings, instantly alerting you if air quality dips. 

No more guessing — just peace of mind that your baby’s air meets the highest standards.

The Whole Family Rests Easier With Sereniby's Smart Features

Sereniby's pure-red LED nightlight, supporting natural melatonin production1

Helping Your Baby Sleep Peacefully

Pure-red nightlight to support melatonin production, restful sleep

Gentle white noise naturally generated — no synthetic recordings

Dark Mode eliminates light pollution to create an ideal sleep environment

An Apple Watch displaying an alert about elevated particulate levels2

Giving You Peace of Mind

Real-time air quality monitoring & alerts keep you confident the air is clean

Springs into action the moment air-quality dips, without you lifting a finger

Filter health sensing ensures optimal performance without any guesswork

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Establishing Healthy Habits

Set-it-and-forget-it scheduling seamlessly integrates into your routines

Rise-to-wake lighting gently cues your toddler for healthy sleep habits

Intuitive on-device controls empower everyone to pitch in, no app required

A Long-Term Investment in Your Child’s Health

Exceptional Air Purification

Not just for babies — this high-performance air purifier rivals the best on the market, delivering clean, healthy air across spaces up to 1,200 square feet.

Energy Smart, Eco-Conscious

Energy-efficient airflow design and a purpose-built motor deliver powerful performance while minimizing impact on the environment — and your electric bill.

Grows with Your Child

Modular, adaptable design transitions effortlessly from nursery to playroom to shared family spaces, providing clean, healthy air at every stage of your child’s growth.

Why Settle When You Can Have It All?

One Device. Everything They Do — Only Better.

Sereniby stacks up well and provides excellent value when compared to other options

Why Settle When You Can Have It All?

One Device. Everything They Do — Only Better.

Sereniby stacks up well and provides excellent value when compared to other options

Welcome To Our Sereniby Community

We love getting to know you. Please tag us @Sereniby_Official or share a review to tell us why clean air matters to your family.

Customer Reviews

Based on 17 reviews
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Dr. Hannah Thompson, DO, MS
Best air filter I’ve ever used

The Sereniby exceeded all expectations. From the look and feel, the setup, the mobile app, and the actual use and impact it has on our toddlers sleep… it’s amazing.

It’s something we recommend to all our friends and pregnant moms as they’re figuring out what they need for their nursery.

We love our Sereniby and know you will to.

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Naomi Coe
Perfect for the nursery!

This air purifier is the best one I've found specifically for the nursery. It has so many features that just make sense, but it's also simple and streamlined. I love the design of it, the adjustable height, the LED nightlight, the white noise it makes and the fact that I can control it from the app without entering the room. So happy with this product!

B
Blair
Perfect for our family

As a family of physicians, we wanted a straightforward, reliable way to improve the air quality in our daughter's room. Sereniby has been great we like being able to check the PM2.5 levels anytime, and the alerts give us a heads-up if anything changes. It's exactly what we needed for their space.

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Jess G.
Peace of mind

Like all parents, we think nonstop about how to make healthy choices for our kids the right nutrition, limiting screen-time, so many things. Most healthy choices take extra time and effort from us every day. With Sereniby, it was different. We set it up easily, and now we know were providing our kids with healthy air, which is so important, without adding more to our plate. It's a huge relief to see something so simple making such a big impact. Highly recommend this to any parent looking for an easy way to support their childs health!

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Lexi
We can see and feel it working!

We were looking for a way to improve the air quality in our sons nursery, and this product has truly exceeded our expectations. The difference is noticeable the air feels fresher, and its reassuring to know our baby is breathing cleaner air. Setup was simple, and I love how it blends seamlessly into the room with its minimalist design. We love the app and get tons of use out of it, but we also appreciate that you don't need the app to control it, which is useful for when grandparents babysit. Finally, we appreciate the gentle noise it emits... ended up getting rid of the white noise machine as this seems to be sufficient to block out background noise while he's sleeping.Highly recommend to any parent who wants a high-quality air purifier for their childs room!