--- product_id: 574256722 title: "Flintar True HEPA Replacement Filter, Compatible with Alen BreatheSmart Flex and 45i Air Purifier, H13 Grade True HEPA, Plus 3 Replaceable Pre-Filters, Part # B4-Fresh (1-Pack)" brand: "flintar" price: "3230302₫" currency: VND in_stock: true reviews_count: 5 category: "Flintar" url: https://www.desertcart.vn/products/574256722-flintar-true-hepa-replacement-filter-compatible-with-alen-breathesmart-flex store_origin: VN region: Vietnam --- # 0.80 lbs activated carbon for odor removal 3 replaceable pre-filters included H13 True HEPA captures 99.97% particles Flintar True HEPA Replacement Filter, Compatible with Alen BreatheSmart Flex and 45i Air Purifier, H13 Grade True HEPA, Plus 3 Replaceable Pre-Filters, Part # B4-Fresh (1-Pack) **Brand:** flintar **Price:** 3230302₫ **Availability:** ✅ In Stock ## Summary > 🌬️ Breathe smarter, live fresher — upgrade your air game now! ## Quick Answers - **What is this?** Flintar True HEPA Replacement Filter, Compatible with Alen BreatheSmart Flex and 45i Air Purifier, H13 Grade True HEPA, Plus 3 Replaceable Pre-Filters, Part # B4-Fresh (1-Pack) by flintar - **How much does it cost?** 3230302₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/574256722-flintar-true-hepa-replacement-filter-compatible-with-alen-breathesmart-flex) ## Best For - flintar enthusiasts ## Why This Product - Trusted flintar brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Maintenance:** Tool-free replacement keeps your air purifier running at peak performance with minimal hassle. - • **Tailored Compatibility:** Specifically designed for Alen BreatheSmart Flex & 45i models—no guesswork, just perfect fit. - • **99.97% Particle Capture:** H13-grade filter traps microscopic pollutants down to 0.1 microns for your health. - • **Odor Eraser Activated Carbon:** Neutralizes pet, cooking, smoke, and VOC odors with premium carbon pellets. - • **Triple-Stage Purification Power:** Pre-filter, True HEPA, and activated carbon combine to deliver ultra-clean air. ## Overview The Flintar True HEPA Replacement Filter (Part # B4-Fresh) is a premium 3-stage filtration system compatible exclusively with Alen BreatheSmart Flex and 45i air purifiers. Featuring an H13-grade True HEPA filter that captures 99.97% of airborne particles as small as 0.1 microns, a pre-filter to trap larger debris, and over 0.80 lbs of activated carbon pellets to eliminate odors and VOCs, this filter ensures cleaner, fresher air. Includes three extra replaceable pre-filters and offers easy, tool-free installation for optimal air purification performance. ## Description Flintar B4-Fresh H13 Grade True HEPA Replacement Filter is compatible with *Alen BreatheSmart Flex and 45i Air Purifiers. This True HEPA Filtration System includes: - Replaceable Pre-Filter: Traps larger particles in the air like dust, hairs, pet fur, lint and prolong the life of True HEPA Filter. Replace every 3 months to keep air purifier running efficiently - H13 Grade True HEPA Filter: Captures 99.97% of harmful airborne particles down to 0.1 microns in size, creating fresh air for you and your family - Activated Carbon Filter: Removes heavy odors from pets, cooking, smoke, wildfire and harmful VOC’s with the power of more than 0.80 lbs of high-efficiency activated carbon pellets Using Flintar premium air purifier filters and replacing the filters regularly will help optimize air cleaning performance. Replace your True HEPA Filter Set every 9-12 months and Pre-Filter every 3 months for optimal performance. Fully compatible with the following Allen Air Purifier: - BreatheSmart Flex - BreatheSmart 45i - DO NOT fit any other models Review: Fits perfectly Review: Better Than The Original & Excellent Seller ## Features - Compatible with Alen BreatheSmart Flex and 45i Air Purifier Only, Part # B4-Fresh (Old Part # FL40-Silver-Carbon). DO NOT fit any other models - Contains One (1) 3-Stage H13 True HEPA filtration system including Pre-Filter, H13 Grade True HEPA Filter, and Activated Carbon Filter. PLUS (3) extra replaceable Pre-Filters for added value - Pre-filter removes larger particles in the air like dust, hairs, pet fur, lint and prolongs the life of True HEPA Filter; Premium H13 Grade True HEPA Filter captures 99.97% of harmful airborne particles down to 0.1 microns in size, creating fresh and purified air for you and your family - Activated Carbon Filter removes heavy odors from pets, cooking, smoke, wildfire, and harmful VOC’s with the power of more than 0.80 lbs of high-efficiency activated carbon pellets - Easy to replace and disposable, no tools required. Replace True HEPA Filter Set every 9-12 months and Pre-filter every 3 months for optimal performance ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BF4NSSFL | | Brand | Flintar | | Brand Name | Flintar | | Compatible Devices | BreathSmart 45i Air Purifier, BreathSmart Flex Air Purifier | | Compatible devices | BreathSmart 45i Air Purifier, BreathSmart Flex Air Purifier | | Customer Reviews | 4.7 out of 5 stars 539 Reviews | | Item Dimensions L x W x Thickness | 35.6L x 27.9W x 5.1Th centimeters | | MERV Rating | 13 | | MERV rating | 13 | | Manufacturer | Flintar LLC | | Material | silver | | Material Type | silver | | Model Number | B4-Fresh | | Number of Items | 1 | | Product dimensions | 35.6L x 27.9W x 5.1Th centimeters | | UPC | 850033652260 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Flintar - **Material:** silver - **Compatible devices:** BreathSmart Flex Air Purifier, BreathSmart 45i Air Purifier - **UPC:** 850033652260 - **Number of Items:** 1 ## Images ![Flintar True HEPA Replacement Filter, Compatible with Alen BreatheSmart Flex and 45i Air Purifier, H13 Grade True HEPA, Plus 3 Replaceable Pre-Filters, Part # B4-Fresh (1-Pack) - Image 1](https://m.media-amazon.com/images/I/71gnrHUnu9L.jpg) ![Flintar True HEPA Replacement Filter, Compatible with Alen BreatheSmart Flex and 45i Air Purifier, H13 Grade True HEPA, Plus 3 Replaceable Pre-Filters, Part # B4-Fresh (1-Pack) - Image 2](https://m.media-amazon.com/images/I/81eHh7MFS7L.jpg) ![Flintar True HEPA Replacement Filter, Compatible with Alen BreatheSmart Flex and 45i Air Purifier, H13 Grade True HEPA, Plus 3 Replaceable Pre-Filters, Part # B4-Fresh (1-Pack) - Image 3](https://m.media-amazon.com/images/I/71fHdLwtZGL.jpg) ![Flintar True HEPA Replacement Filter, Compatible with Alen BreatheSmart Flex and 45i Air Purifier, H13 Grade True HEPA, Plus 3 Replaceable Pre-Filters, Part # B4-Fresh (1-Pack) - Image 4](https://m.media-amazon.com/images/I/81AwsP2XKaL.jpg) ![Flintar True HEPA Replacement Filter, Compatible with Alen BreatheSmart Flex and 45i Air Purifier, H13 Grade True HEPA, Plus 3 Replaceable Pre-Filters, Part # B4-Fresh (1-Pack) - Image 5](https://m.media-amazon.com/images/I/71LxIp0YBIL.jpg) ## Questions & Answers **Q: The listing says the filter captures 99.97% down to .1 microns, but the label on the box it captures 99.97% of particles 0.3 microns or larger. So?** A: Science/Engineer guys trying CYA, guessing. The takeaway is captures 0.3 or larger…sometimes it has captures down to 0.1, but they can only confirm 0.3. **Q: Will this filter kill mold and fish order?** A: Yes. This H13 True HEPA can capture up to 99.9% of airborne particles down to 0.1 microns, including pollen, mold, germs, bacteria. Its Activated Carbon Filter removes heavy odors from pets, smoke, cooking such as fish smell, and VOC’s with the power of more than 0.80 lbs of high-efficiency activated carbon pellets. **Q: Will this fit the breathesmart flex bh400 model?** A: Yes, it fits all of the BreatheSmart Flex series. **Q: Compatible with alen breathesmart f700 air purifier ? my filter now is hepa-silver (ff700-silver-carbon) hma 0405. bought in hong kong** A: Sorry, it only fits Alen BreatheSmart FLEX or 45i. It will not fit the F700 model. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fits perfectly *by T***. on 20 May 2023* ### ⭐⭐⭐⭐⭐ Better Than The Original & Excellent Seller *by S***O on 26 June 2022* ### ⭐⭐⭐⭐⭐ Perfect at fraction of cost! *by J***L on 9 September 2025* ## Frequently Bought Together - Flintar True HEPA Replacement Filter, Compatible with Alen BreatheSmart Flex and 45i Air Purifier, H13 Grade True HEPA, Plus 3 Extra Pre-Filters, Part # B4-Fresh (1-Pack) - Durabasics HEPA Filter Compatible with Alen BreatheSmart Classic & BF35 - Durabasics HEPA Filters Compatible with Alen T500-2 Pack Replacement Filter --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vn/products/574256722-flintar-true-hepa-replacement-filter-compatible-with-alen-breathesmart-flex](https://www.desertcart.vn/products/574256722-flintar-true-hepa-replacement-filter-compatible-with-alen-breathesmart-flex) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-22*