Description
xElevate your air quality with Flintar B4-Fresh
The Flintar B4-Fresh replacement filter is a direct fit for Alen BreatheSmart Flex and 45i purifiers. This three-stage filter set is designed for easy swap, providing a reliable refresh to your purifier without changing its form or operation.
Three-stage filtration at a glance
- Replaceable pre-filter traps hair, dust, and pet dander before reaching the main filter.
- H13-grade main filter captures fine particles down to 0.1 microns with high efficiency.
- Activated carbon layer with more than 12 ounces of carbon pellets targets odors and VOCs for a fresher room feel.
Note: This is a direct replacement for Alen BreatheSmart Flex and 45i models and is not intended for other purifiers.
What’s included and how to maintain performance
- One complete filter set: pre-filter, main filter, and activated carbon filter.
- Three extra replaceable pre-filters for extended maintenance between full replacements.
For ongoing performance, plan replacement on a schedule: change the main filter every 9 to 12 months and the pre-filter every 3 months, depending on usage and air quality.
Real-life use and installation tips
In everyday homes, the Flintar B4-Fresh acts behind the scenes to keep air feeling crisper as pets, cooking, and everyday activity come and go. The carbon layer helps manage odors from cooking, smoking, or smoky environments, while the fine particles are repelled by the high efficiency main filter.
- Power off the purifier before replacing filters for safe handling.
- Install filters in the correct orientation and ensure a snug, secure fit.
- Replace carbon and pre-filters as part of your routine so performance remains consistent.
Compatibility note
This Flintar filter is designed as a direct replacement for Alen BreatheSmart Flex and 45i purifiers. It should not be used with other model lines.
Choosing Flintar B4-Fresh means a straightforward upgrade path, with clear replacement intervals and components built to work together for cleaner air in your space.
FAQ
Q: Which air purifiers is the Flintar B4-Fresh replacement filter compatible with?
A: Directly compatible with Alen BreatheSmart Flex and 45i models.
Q: How often should I replace Flintar B4-Fresh filters?
A: Main filter every 9-12 months; pre-filters every 3 months for best results.
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.