---
product_id: 42825249
title: "Alen Air Filter B4-Pure Replacement H13 True HEPA Filter for BreatheSmart 45i & Flex Air Purifier - Captures Allergens, Dust, & Mold (1 Filter)"
brand: "alen"
price: "E£ 2376"
currency: EGP
in_stock: false
reviews_count: 5
url: https://www.desertcart.com.eg/products/42825249-alen-air-filter-b4-pure-replacement-h13-true-hepa-filter
store_origin: EG
region: Egypt
---

# 9-12 months lifespan 0.1 micron filtration 99.9% airborne particle capture Alen Air Filter B4-Pure Replacement H13 True HEPA Filter for BreatheSmart 45i & Flex Air Purifier - Captures Allergens, Dust, & Mold (1 Filter)

**Brand:** alen
**Price:** E£ 2376
**Availability:** ❌ Out of Stock

## Summary

> Breathe Fresh, Live Vibrant! 🌱

## Quick Answers

- **What is this?** Alen Air Filter B4-Pure Replacement H13 True HEPA Filter for BreatheSmart 45i & Flex Air Purifier - Captures Allergens, Dust, & Mold (1 Filter) by alen
- **How much does it cost?** E£ 2376 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.eg](https://www.desertcart.com.eg/products/42825249-alen-air-filter-b4-pure-replacement-h13-true-hepa-filter)

## Best For

- alen enthusiasts

## Why This Product

- Trusted alen brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Leak-Free Efficiency:** Maximize airflow and capture stubborn particles with our unique design.
- • **Medical-Grade Purity:** Experience the power of H13 True HEPA filtration for a healthier home.
- • **Effortless Maintenance:** Enjoy hassle-free upkeep with our easy-to-clean pre-filter design.
- • **Breathe Easy, Live Well:** Transform your indoor air quality with our advanced HEPA technology.
- • **Long-Lasting Performance:** Forget frequent replacements; our filters last up to a year!

## Overview

The Alen Air Filter B4-Pure Replacement H13 True HEPA Filter is designed for the BreatheSmart 45i & Flex Air Purifier, capturing 99.9% of airborne particles as small as 0.1 micron. With a lifespan of 9 to 12 months and an easy-to-clean pre-filter, it ensures efficient air purification while promoting a healthier living environment.

## Description

Full description not available

## Features

- HEPA AIR FILTER: Breathe cleaner air with the Alen Air Purifier's high-quality HEPA filter. This advanced filter captures allergens, dust, mold, and germs, promoting a healthier and safer environment for you and your loved ones.
- MEDICAL-GRADE H13 TRUE HEPA FILTER: Discover the exceptional power of our medical-grade H13 True HEPA filter within your home. Our filter captures 99.9% of airborne particles as small as 0.1 micron, this technology provides clean and fresh air throughout your space. Take control of your indoor air quality and create a safe haven for your family.
- HASSLE-FREE MAINTENANCE: Convenience made simple. Our Air Filter Replacements feature an easily removable pre-filter screen. Effortlessly clean your replacement filter using a vacuum ensuring optimal performance and extending its lifespan. Save time and effort while enjoying consistent air purification in your home.
- EXTRA LONG LASTING: Say goodbye to frequent filter replacements. Our filter has a 9 to 12 months lifespan. Enjoy continuous and hassle-free air purification without the worry of constantly replacing filters.
- EFFICIENT FILTER PERFORMANCE: Experience efficient performance with our Alen Air Purifier Filters. The unique design of our H13 True HEPA Medical-Grade Filters includes foam on the outside of the frame, which ensures exceptional effectiveness without any air leaks. Maximize airflow while capturing even the most stubborn particles, achieving a thorough and comprehensive clean.

## Product Details

- **Brand:** Alen
- **Material:** Allergies/Dust
- **Product Dimensions:** 15"L x 11"W x 2"Th
- **MERV Rating:** 17
- **Compatible Devices:** Air Purifier
- **Item Weight:** 16 ounces
- **Global Trade Identification Number:** 00810587023091
- **UPC:** 810587023091
- **Number of Items:** 1
- **Manufacturer:** Alen

## Images

![Alen Air Filter B4-Pure Replacement H13 True HEPA Filter for BreatheSmart 45i & Flex Air Purifier - Captures Allergens, Dust, & Mold (1 Filter) - Image 1](https://m.media-amazon.com/images/I/71Dl-IElsqL.jpg)
![Alen Air Filter B4-Pure Replacement H13 True HEPA Filter for BreatheSmart 45i & Flex Air Purifier - Captures Allergens, Dust, & Mold (1 Filter) - Image 2](https://m.media-amazon.com/images/I/71m0WX2w6iL.jpg)
![Alen Air Filter B4-Pure Replacement H13 True HEPA Filter for BreatheSmart 45i & Flex Air Purifier - Captures Allergens, Dust, & Mold (1 Filter) - Image 3](https://m.media-amazon.com/images/I/81JlXSwXZHL.jpg)
![Alen Air Filter B4-Pure Replacement H13 True HEPA Filter for BreatheSmart 45i & Flex Air Purifier - Captures Allergens, Dust, & Mold (1 Filter) - Image 4](https://m.media-amazon.com/images/I/81FHupD7TSL.jpg)
![Alen Air Filter B4-Pure Replacement H13 True HEPA Filter for BreatheSmart 45i & Flex Air Purifier - Captures Allergens, Dust, & Mold (1 Filter) - Image 5](https://m.media-amazon.com/images/I/71yjCbN7r-L.jpg)

## Available Options

This product comes in different **Size, Style Name** options.

## Questions & Answers

**Q: What are the dimensions of this filter?**
A: The FL40 Silver-Carbon filter is 11 inches by 14 inches

**Q: Why would my unit indicate a need to change filter after less than a month of use?**
A: Each time you put in a new filter you'll need to press and hold the filter button on the control panel for 10 seconds to reset the red iight back to green. So, you my just need to reset that filter light.

**Q: Does the replacement filter come with a new pre-filter?**
A: Te filter has a thin layer on top of the main filter that you can remove and vacuum other for longer use I have two Shizu pups and
I am amazed at the things the filter catches that you can’t see with naked eyes I have one in my den and another in my bedroom We
Love ours

**Q: My replacement filter arrived without the black pre-filter. Am I supposed to keep and clean the original pre-filter and re-apply it to the new filter?**
A: Not sure what you are "supposed" to do, but since I don't throw away much I would have kept the pre-filter. Now I just thoroughly rinse my pre-filters and vacuum the filter until it is just too dirty to continue with it.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Permanent Pre-Filter for B4-Pure
*by T***L on March 11, 2025*

Been using multiple Alen machines for a couple of years. This time I ordered and received the B4-Pure filter. I was a little thrown when not seeing a removable pre-filter. This updated version has a permanent plastic-like pre-filter attached. Per Alen, this Pre-filter is easily cleaned using the vacuum (same as the removable ones). Just started using… I’ll try to update in a couple of weeks.

### ⭐⭐⭐⭐⭐ Superior air, quality, and long lasting filter
*by D***D on November 25, 2024*

I purchased the filter with the machine, the air purifier and I knew right off the bat. The quality of this filter was heavier than other filters I’ve used and add an air purifying machines. I was shocked at how the quality of the air in my apartment is with this air purifier. This filter is incredible at cleaning air. It gets everything out dust smoke smells from cooking and I was shocked at how long this filter lasted. It lasted me eight months and it kept the air quality for up to eight months at a very high quality. This is the only air filter I will use from now on it is pricey, compared to others, but I realize you get what you pay for. I highly recommend spend the money get the best you won’t regret. David NY

### ⭐⭐⭐⭐⭐ Breathe Easy with the Alen Air Filter Replacement
*by S***N on December 10, 2023*

I recently replaced my old air filter with the alen replacement filter, and the difference it has made in the air quality of my home is truly remarkable. As someone who is conscious of the impact of air quality on health and well-being, I can confidently say that this product has exceeded my expectations in every aspect, it really does help with mold spores! I have first hand experience with unknowingly living with mold and this air purifier saved us!The alen replacement filter was a perfect fit for my air purification system, and the clear instructions provided made the replacement process straightforward and hassle-free. Within minutes, I had a fresh filter in place and was ready to experience the benefits.From the moment the new filter was in place, I noticed a significant improvement in the air quality throughout my home. The filter's advanced design effectively captures dust, pollen, pet dander, and other airborne particles, resulting in cleaner, fresher air. This has been particularly beneficial for my family, as we have noticed a reduction in allergy symptoms and an overall improvement in respiratory comfort.Another standout feature of the alen replacement filter is its longevity. Despite its high level of filtration, the filter has demonstrated impressive durability and has maintained its effectiveness over time, my first filter lasted over a year! This has not only saved me money on frequent replacements but has also provided peace of mind knowing that my air purification system is consistently delivering optimal performance.Furthermore, the filter's construction is of high quality, and its robust design ensures a secure fit and reliable operation. This attention to detail has contributed to my confidence in the product's ability to deliver consistent and reliable air filtration.In conclusion, I highly recommend the alen air filter replacement to anyone seeking to improve the air quality in their home. Its exceptional performance, ease of installation, and long-lasting effectiveness make it a top choice for those who prioritize clean and healthy indoor air. By investing in this replacement filter, you can breathe easy knowing that you are creating a healthier environment for yourself and your loved ones.

## Frequently Bought Together

- Alen Air Filter B4-Pure Replacement H13 True HEPA Filter for BreatheSmart 45i & Flex Air Purifier - Captures Allergens, Dust, & Mold (1 Filter)
- Alen Air Filter BF35-Fresh Replacement HEPA Filter for BreatheSmart Classic Air Purifier - Captures Allergens, Dust, & Mold + Odors & Smoke (1 Filter)
- Alen Air Filter B7-Pure Replacement H13 True HEPA FIlter for BreatheSmart 75i Air Purifier - Captures Allergens, Dust, & Mold (1 Filter)

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*Product available on Desertcart Egypt*
*Store origin: EG*
*Last updated: 2026-02-10*