---
product_id: 574256722
title: "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: "€ 112.45"
currency: EUR
in_stock: true
url: https://www.desertcart.sk/products/574256722-true-hepa-replacement-filter-compatible-with-alen-breathesmart-flex-45i
store_origin: SK
region: Slovakia
---

# 99.97% filtration 0.1 micron capture 3 replaceable pre-filters 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:** € 112.45
**Availability:** ✅ In Stock

## Summary

> Breathe Fresh, Live Fresh! 🌬️

## Quick Answers

- **What is this?** 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?** € 112.45 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/574256722-true-hepa-replacement-filter-compatible-with-alen-breathesmart-flex-45i)

## 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

- • **Value Pack:** Includes 3 extra pre-filters for extended use.
- • **Simple Swap:** Tool-free replacement for hassle-free maintenance.
- • **Breathe Easy:** Experience cleaner air with H13 Grade True HEPA filtration.
- • **Odor Be Gone:** Activated Carbon Filter eliminates unwanted odors effortlessly.
- • **Long-Lasting Performance:** Replace filters every 9-12 months for optimal air quality.

## Overview

The Flintar True HEPA Replacement Filter is designed specifically for Alen BreatheSmart Flex and 45i Air Purifiers, featuring a 3-stage filtration system that includes a premium H13 Grade True HEPA filter, activated carbon filter, and three additional pre-filters. This filter captures 99.97% of airborne particles down to 0.1 microns, ensuring your home remains a sanctuary of clean air. Easy to replace and maintain, it’s the perfect solution for families seeking a healthier living environment.

## Description

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)

## 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 |
|---------------|-------|
| Brand Name | Flintar |
| Model Info | B4-Fresh |
| Product Dimensions | 35.56 x 27.94 x 5.08 cm; 1.08 kg |
| Part Number | B4 Fresh |
| Compatible Device | BreathSmart Flex Air Purifier, BreathSmart 45i Air Purifier |
| Material Type | silver |
| Batteries Included? | No |
| Batteries Required? | No |
| Item Weight | 1.08 Kilograms |

## Product Details

- **Brand:** Flintar
- **Material:** silver
- **Compatible devices:** BreathSmart Flex Air Purifier, BreathSmart 45i Air Purifier
- **UPC:** 850033652260
- **Number of Items:** 1

## Images

![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)

## 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.

## 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.sk/products/574256722-true-hepa-replacement-filter-compatible-with-alen-breathesmart-flex-45i](https://www.desertcart.sk/products/574256722-true-hepa-replacement-filter-compatible-with-alen-breathesmart-flex-45i)

---

*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-06*