---
product_id: 518366784
title: "B4-Fresh Replacement Filter, Compatible with Alen BreatheSmart Flex and 45i Air Purifier, H13 Grade High Efficiency Air Filtration with 12 oz. Activated Carbon Pellets, 1-Pack"
brand: "flintar"
price: "RM338"
currency: MYR
in_stock: true
reviews_count: 8
category: "Flintar"
url: https://www.desertcart.com.my/products/518366784-b4-fresh-replacement-filter-compatible-with-alen-breathesmart-flex-45i
store_origin: MY
region: Malaysia
---

# 12 oz activated carbon pellets for odor removal 3-stage filtration system for total air purity H13 Grade captures 99.9% particles B4-Fresh Replacement Filter, Compatible with Alen BreatheSmart Flex and 45i Air Purifier, H13 Grade High Efficiency Air Filtration with 12 oz. Activated Carbon Pellets, 1-Pack

**Brand:** flintar
**Price:** RM338
**Availability:** ✅ In Stock

## Summary

> 🌬️ Breathe Brilliance: Elevate your air, elevate your life.

## Quick Answers

- **What is this?** B4-Fresh Replacement Filter, Compatible with Alen BreatheSmart Flex and 45i Air Purifier, H13 Grade High Efficiency Air Filtration with 12 oz. Activated Carbon Pellets, 1-Pack by flintar
- **How much does it cost?** RM338 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.my](https://www.desertcart.com.my/products/518366784-b4-fresh-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

- • **Odor Obliterator:** 12 oz of activated carbon pellets neutralize pet, smoke, cooking & wildfire odors effortlessly.
- • **Value-Added Pack:** Includes 3 extra pre-filters to keep your air purifier running at peak power longer.
- • **Elite H13 Efficiency:** Filters down to 0.1 microns, eliminating 99.9% of airborne pollutants for a healthier home.
- • **Seamless Compatibility:** Perfectly engineered for Alen BreatheSmart Flex & 45i models—no guesswork, just pure performance.
- • **Triple-Action Purification:** Pre-filter, H13 main filter & activated carbon combine for unmatched air freshness.

## Overview

The Flintar B4-Fresh Replacement Filter is a premium H13 grade air purifier filter designed exclusively for Alen BreatheSmart Flex and 45i models. Featuring a three-stage filtration system with a pre-filter, high-efficiency H13 main filter capturing 99.9% of particles down to 0.1 microns, and 12 oz of activated carbon pellets to eliminate stubborn odors, it ensures fresher, cleaner indoor air. The package includes one complete filter set plus three extra pre-filters, offering extended value and optimized air purification performance.

## Description

Flintar B4-Fresh H13 Grade Replacement Filter is compatible with Alen BreatheSmart Flex and 45i Air Purifiers. This Air Filtration System includes: Replaceable Pre-filter: Traps larger particles in the air like hair, dust, pet fur, lint and and prolong the life of Main Filter. Replace every 3 months to keep air purifier running efficiently . H13 Grade High Efficiency Main Filter: Captures 99.9% of airborne particles down to 0.1 microns in size, creating fresh and purified air for you and your family. Activated Carbon Filter: Removes heavy household odors from pets, cooking, smoking, wildfire and harmful VOC’s with the power of more than 12 oz. 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 Main Filter every 9-12 months and Pre-Filter every 3 months for optimal performance.

Review: Works Like OEM - Works like OEM. It’s a good replacement and quickly clears the indoor air of smells pet smells smoke, etc..
Review: Perfect at fraction of cost! - Fit the brand name at half the cost!!

## Features

- COMPATIBILITY: Specifically designed to be fully compatible with Alen BreatheSmart Flex and 45i air purifier model as a direct replacement filter. Compares to Part # B4-Fresh (Old Part # FL40-Silver-Carbon). DO NOT fit any other models
- THREE-STAGE FILTRATION: Features pre-filter, H13 Grade main filter, and activated carbon filter for comprehensive air purification
- PREMIUM FILTER GRADE: H13 grade air filtration system captures 99.9% of harmful airborne particles with superior efficiency for cleaner and fresher indoor air
- HIGH-EFFICIENCY: Activated Carbon Filter removes heavy household odors from pets, cooking, smoking, wildfires, and harmful VOC’s with the power of more than 12 oz high-efficiency activated carbon pellets
- PACKAGE CONTENTS: Includes One (1) complete set of replacement filters (pre-filter, main filter, and activated carbon), PLUS (3) extra replaceable Pre-Filters for added value

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Best Sellers Rank | #107,733 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #734 in Air Purifier Filters |
| Brand | Flintar |
| Compatible Devices | BreathSmart 45i Air Purifier, BreathSmart Flex Air Purifier |
| Customer Reviews | 4.7 out of 5 stars 572 Reviews |
| MERV Rating | 13 |
| Material | Paper, Carbon |
| Product Dimensions | 14"L x 11"W x 2"Th |
| UPC | 850033652260 |

## Product Details

- **Air Filter Construction:** Pleated
- **Brand:** Flintar
- **Compatible Devices:** BreathSmart 45i Air Purifier, BreathSmart Flex Air Purifier
- **MERV Rating:** 13
- **Manufacturer:** Flintar LLC
- **Material:** Paper, Carbon
- **Number of Items:** 1
- **Product Dimensions:** 14"L x 11"W x 2"Th
- **Product Grade:** New
- **UPC:** 850033652260

## Images

![B4-Fresh Replacement Filter, Compatible with Alen BreatheSmart Flex and 45i Air Purifier, H13 Grade High Efficiency Air Filtration with 12 oz. Activated Carbon Pellets, 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works Like OEM
*by M***E on December 16, 2025*

Works like OEM. It’s a good replacement and quickly clears the indoor air of smells pet smells smoke, etc..

### ⭐⭐⭐⭐⭐ Perfect at fraction of cost!
*by J***L on September 9, 2025*

Fit the brand name at half the cost!!

### ⭐⭐⭐⭐⭐ Excellent
*by N***D on December 31, 2025*

Excellent. Would but again.

## 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

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*Product available on Desertcart Malaysia*
*Store origin: MY*
*Last updated: 2026-02-20*