Description
xRefresh your AP400 with genuine SIESEAN filters
Designed by the original manufacturer for the AP400, this four-filter set is built to fit perfectly and maintain the purifier’s intended airflow and filtration balance. Using authentic parts helps ensure the device performs as expected, while you refresh both particle and odor control in one simple bundle.
With official filters, you get a fit that aligns with the AP400’s bottom slots, a proper seal, and consistent airflow through every cycle. This reduces the guesswork of compatibility and helps preserve the purifier’s design intent over time.
What’s inside the 4-pack
- Two H13 True HEPA filters designed to capture fine particles with high efficiency, filtering small dust, pollen, and pet dander
- Two activated carbon filters that help absorb cooking smells, smoke, and common indoor gases
- Filters sized for AP400 with precise dimensions for reliable seating and sealing
- Clear guidelines for replacement cadence to help maintain steady air purification
How the filtration works in daily spaces
The H13 True HEPA stage targets particles as small as 0.1 microns, delivering effective filtration as air passes through the purifier. The activated carbon stage reduces odors and gases from everyday activities, contributing to a fresher room feel when you’re cooking, cleaning, or caring for pets.
Real-world use and maintenance
In a home environment—bedrooms, living rooms, kitchens—users may notice crisper air and a more neutral scent after refreshing with the AP400 filters. Results vary by space, but many people experience a more comfortable atmosphere during daily routines.
- Replacement cadence: replace every 3–4 months, depending on usage and air quality
- Easy, tool-free installation: remove packaging, align with bottom locking slots, and push in until secure
- Maintain seal and airflow: ensure all filters sit evenly to avoid gaps
Choosing genuine SIESEAN AP400 filters supports the purifier’s designed airflow and filtration balance. This 4-pack provides a straightforward upgrade path that keeps maintenance simple and predictable, helping you stay on top of indoor air quality with confidence. Store in a cool, dry place when not in use to maintain filter integrity.
FAQ
Q: What does the SIESEAN AP400 replacement set include?
A: A 4-pack with 2 H13 True HEPA filters and 2 activated carbon filters, designed by SIESEAN for AP400.
Q: How often should I replace the filters and how to install?
A: Replace every 3–4 months based on usage and air quality; install easily by aligning with bottom slots and removing packaging.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
- Choosing a selection results in a full page refresh.