---
product_id: 150995432
title: "Alen (BF25A-Silver HEPA-Silver Replacement Filter for A350 and A375 Air Purifiers, 1-Pack"
brand: "alen"
price: "£264.78"
currency: GBP
in_stock: true
reviews_count: 5
category: "Alen"
url: https://www.desertcart.co.uk/products/150995432-alen-bf25a-silver-hepa-silver-replacement-filter-for-a350-a375
store_origin: GB
region: United Kingdom
---

# Silver-Ion tech kills 99.99% bacteria HEPA captures 99.97% airborne allergens Pre-filter extends filter lifespan Alen (BF25A-Silver HEPA-Silver Replacement Filter for A350 and A375 Air Purifiers, 1-Pack

**Brand:** alen
**Price:** £264.78
**Availability:** ✅ In Stock

## Summary

> 🌿 Elevate your air game — breathe cleaner, live smarter!

## Quick Answers

- **What is this?** Alen (BF25A-Silver HEPA-Silver Replacement Filter for A350 and A375 Air Purifiers, 1-Pack by alen
- **How much does it cost?** £264.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/150995432-alen-bf25a-silver-hepa-silver-replacement-filter-for-a350-a375)

## 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

- • **Silver-Ion Shield:** Built-in antimicrobial threads inhibit harmful bacteria and microbes, keeping your filter fresher longer.
- • **Odor & VOC Defense:** Activated carbon layer neutralizes household odors and volatile organic compounds for cleaner air.
- • **Extended Filter Life:** Washable pre-filter captures large particles, reducing wear and saving you money on replacements.
- • **Tailored Fit for Alen:** Specifically designed for A350 and A375 models to ensure optimal air purification performance.
- • **Breathe Pure, Live Better:** Advanced HEPA filtration traps dust, pollen, pet dander & mold spores for allergy relief.

## Overview

The Alen BF25A-Silver HEPA Replacement Filter is engineered for A350 and A375 air purifiers, combining a washable pre-filter, electrostatically charged HEPA material with antimicrobial silver-ion threads, and activated carbon to remove 99.97% of airborne allergens, neutralize odors, and inhibit bacterial growth, ensuring fresher, healthier indoor air.

## Description

Designed for the Alen A350 and A375 Air Purifiers, the Alen HEPA-Silver Filter combines three layers of filter technology to purify and freshen the air in your home while protecting the filter against bacteria and microbes. Polluted air first passes through Alen's washable Pre-Filter to capture large particles, extending the life of the filter. In the second layer, air moves through a unique, electrostatically charged HEPA style material that attracts and captures dust, pollen, pet dander, mold spores and other airborne pollutants. Alen's anti-microbial Silver-Ion threads are woven into the HEPA style material, protecting the filter from harmful bacteria and microbe growth. In the final layer, clean air passes through a layer of Alen's Activated Carbon, reducing light odors and chemicals commonly found in the air from cleaning products, smoke, cooking, pets and various other household materials. Test results demonstrate a 99.99% kill rate on E. Coli and Staph Bacteria.

Review: Great job filtering out cat litter dust - Does a great job filtering cat litter dust & smell, the HEPA filter adds another layer of protection, and lasts a long time even with 24-hour/7-days a week use. I've been buying these for years and will continue.
Review: Works okay - relatively expensive, but ultimately worth it! - I got this to replace my original Alen HEPA filter. It fits in and works fine. But wow, it seemed so expensive for what you get! However, when you think about it, a HEPA filter system is essentially just a fan pushing air through a filter like this. So really, the filter IS the key part of the system. So you want it to be high quality to effectively filter out fire smoke, pet dander, pollen, etc. and this does that job just fine. It got me through the extreme fire smoke clouds of late Summer/Fall 2020.

## Features

- Silver-Ion Technology protects the filter against growth of harmful bacteria and microbes
- Creates an allergy and asthma friendly environment by removing dust, pet dander, mold spores and pollen from the air
- Provides pure, breathable air by capturing VOCs (Volatile Organic Compounds) from cleaning products, personal care items and other household materials
- Pre-Filter layer extends the life of the filter

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00393TWHW |
| Brand | Alen |
| Brand Name | Alen |
| Compatible Devices | Air Purifier |
| Compatible devices | Air Purifier |
| Customer Reviews | 4.6 out of 5 stars 147 Reviews |
| Global Trade Identification Number | 00893127001445, 10893127001442 |
| Included Components | Filter |
| Item Type Name | Filter |
| MERV Rating | 13 |
| MERV rating | 13 |
| Manufacturer | Alen |
| Manufacturer Part Number | BF25A-Silver |
| Material | HEPA-type and Activated Carbon |
| Material Type | HEPA-type and Activated Carbon |
| Model Number | BF25A-Silver |
| Number of Items | 1 |
| Product Grade | new |
| UPC | 893127001445 798837823519 785934269777 |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** Alen
- **Material:** HEPA-type and Activated Carbon
- **Compatible devices:** Air Purifier
- **Global Trade Identification Number:** 00893127001445, 10893127001442
- **UPC:** 893127001445 798837823519 785934269777
- **Number of items:** 1
- **Manufacturer:** Alen
- **Product grade:** new
- **Unit count:** 1.0 count

## Images

![Alen (BF25A-Silver HEPA-Silver Replacement Filter for A350 and A375 Air Purifiers, 1-Pack - Image 1](https://m.media-amazon.com/images/I/81LLwX+shUL.jpg)
![Alen (BF25A-Silver HEPA-Silver Replacement Filter for A350 and A375 Air Purifiers, 1-Pack - Image 2](https://m.media-amazon.com/images/I/81QSkIWAw9L.jpg)
![Alen (BF25A-Silver HEPA-Silver Replacement Filter for A350 and A375 Air Purifiers, 1-Pack - Image 3](https://m.media-amazon.com/images/I/81XHsriHPZL.jpg)
![Alen (BF25A-Silver HEPA-Silver Replacement Filter for A350 and A375 Air Purifiers, 1-Pack - Image 4](https://m.media-amazon.com/images/I/818bBS2GHWL.jpg)
![Alen (BF25A-Silver HEPA-Silver Replacement Filter for A350 and A375 Air Purifiers, 1-Pack - Image 5](https://m.media-amazon.com/images/I/81yE7zfv5nL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great job filtering out cat litter dust
*by S***S on 27 October 2025*

Does a great job filtering cat litter dust & smell, the HEPA filter adds another layer of protection, and lasts a long time even with 24-hour/7-days a week use. I've been buying these for years and will continue.

### ⭐⭐⭐⭐⭐ Works okay - relatively expensive, but ultimately worth it!
*by D***R on 2 December 2020*

I got this to replace my original Alen HEPA filter. It fits in and works fine. But wow, it seemed so expensive for what you get! However, when you think about it, a HEPA filter system is essentially just a fan pushing air through a filter like this. So really, the filter IS the key part of the system. So you want it to be high quality to effectively filter out fire smoke, pet dander, pollen, etc. and this does that job just fine. It got me through the extreme fire smoke clouds of late Summer/Fall 2020.

### ⭐⭐⭐⭐⭐ This filter unit works great and and helps the spread of cold and flu in the home.
*by A***R on 9 April 2021*

The unit and its filter replacement are so very easy to install. No muss or fuss and I like the automatic reorder which reminds me to change on schedule. I have allergies and this filter helps me during my difficult seasons.

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**Shop now:** [https://www.desertcart.co.uk/products/150995432-alen-bf25a-silver-hepa-silver-replacement-filter-for-a350-a375](https://www.desertcart.co.uk/products/150995432-alen-bf25a-silver-hepa-silver-replacement-filter-for-a350-a375)

---

*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-06-17*