Frequently Asked Questions

Babies breathe more quickly than adults, making good air circulation essential for maintaining a safe sleep environment. Research indicates that using a fan in a nursery can promote healthy airflow, which contributes to safer sleep. Many pediatricians recommend incorporating a fan to support overall safe sleep practices and create a fresh, breathable space for your baby. Research shows the potential benefits of using a fan in your baby’s room.

PM2.5 particles are fine particulate matter that measure 2.5 micrometers or smaller in diameter. Due to their tiny size, they can penetrate deep into the lungs and even enter the bloodstream, causing various health issues. In babies, exposure to PM2.5 particles has been associated with respiratory problems, increased risk of allergies and asthma, and even neurobehavioral challenges. Learn more about the impacts of PM2.5 on your baby’s health here

Sereniby is designed to fit seamlessly beside your baby’s crib or bassinet, quietly circulating purified air for safer, healthier sleep. Its adjustable height allows it to grow with your baby, adapting easily to crib adjustments. Just position Sereniby, turn it on, and enjoy peace of mind knowing your baby is breathing clean air throughout the night.

Equipped with a medical-grade HEPA filter paired with activated carbon, Sereniby is capable of purifying the air in nurseries of any size, even under challenging conditions. It is engineered to not just clean, but to create an environment that meets the World Health Organization’s aspirational air quality standards

Sereniby is equipped with the most accurate PM2.5 sensor technology available. It provides real-time air quality read-outs both on the device and via the app, assuring you that your baby is breathing clean air.

Safety comes first with Sereniby. It boasts multiple anti-tip mechanisms – including an anchoring kit and stabilizing feet – a baby-safe cord-management system, and hidden fan blades to protect curious little fingers. These features are part of our holistic commitment to creating a secure environment for your child.

As parents, we understand the need for simplicity and convenience. Sereniby offers an intuitive app, with custom scheduling features and Auto Purify mode for hassle-free operation. Its embedded nightlight and rise alarm reduce the need for additional gadgets, simplifying your nursery. Plus, its core functions are app-independent for ease of use by any caregiver.

Not at all. Sereniby includes a 'dark mode' feature that allows all lights, including the LCD, to be switched off to prevent light pollution, ensuring your baby's sleep environment remains undisturbed.

Over time, Sereniby’s HEPA filter will capture particulate matter and need to be replaced — just like any high-performance air purifier. To ensure safe and effective operation, Sereniby is designed to work exclusively with our certified filters. These filters are the only ones that integrate with the app to track usage, monitor filter health, and support optimal performance.

Most families will need to replace the filter approximately every 6 months, though this can vary based on indoor air quality. Replacements can be easily ordered through the app when needed.

Sereniby is capable of purifying spaces up to 1,200 square feet, but is designed for optimal performance in nurseries of up to 600 square feet. This ensures the air around your baby is continually refreshed and purified, maintaining a safe, healthy environment tailored to their needs.

Yes — eligible customers can use HSA or FSA funds to purchase Sereniby through our secure checkout, powered by Flex.

At checkout, select the “Pay with HSA/FSA” option. If your account qualifies, you’ll be able to pay using your HSA or FSA card, or split the purchase across multiple payment methods if needed.

To ensure Flex appears at checkout, please make sure you are not logged into a Shopify customer account when checking out.

Flex handles all eligibility and documentation — no extra steps required.

Yes! Sereniby is delighted to offer a 15% registry completion discount to help you finish building your nursery. This discount is available beginning 60 days before your expected due date and remains valid up to 90 days after baby’s arrival. To claim your discount, please submit a request here, email us at contact@sereniby.com, or call us at 215-650-7523 (Monday–Friday, 9 am–5 pm ET).

Yes. We are proud to support those who dedicate their lives to serving others. Sereniby offers a 15% discount for active duty service members and veterans, healthcare workers, teachers, first responders (police officers, firefighters, EMTs), and public servants across all levels of government. To verify eligibility and redeem this discount, submit a request here, email us at contact@sereniby.com, or call us at 215-650-7523 (Monday–Friday, 9 am–5 pm ET).

Yes! If you’re planning to purchase more than one Sereniby purifier — whether for siblings, grandparents’ homes, or anyone else in the family — we offer automatic savings when you buy multiple units in a single order. Here’s how it works:

• Buy 2 and get 20% off the second unit
• Buy 3 and get 30% off the third unit
• Buy 4 or more and get 40% off each additional unit

The discount is automatically applied at checkout. No code needed! And yes, HSA/FSA funds can absolutely be used for qualifying purchases!

Yes. As parents, we know how important it is to contribute to a vision of the world that we can be proud to leave our children. Sereniby is manufactured under strict environmental-management standards, which have been tested and confirmed by an international standards body (ISO14001).

Yes! Sereniby uses a purpose-designed, custom motor, energy-efficient electrical components, and advanced airflow engineering. Combined with Auto Purify and scheduling features, it optimizes energy usage while maintaining powerful air purification.

Sereniby comes with a 2-year warranty, covering repairs and replacements for any manufacturing defects.

Sereniby offers free standard shipping throughout the continental United States.

We offer 30-day risk-free returns. If you’re not satisfied with Sereniby, you can return it within the first 30 days for a full refund.

Sereniby is available for purchase with free standard shipping throughout the continental United States. Unfortunately, we are currently unable to ship to Alaska, Hawaii, or U.S. territories.

Sadly, not right away, but if you live in another market and are eager to buy Sereniby for your family, we’d love to hear from you.