AlenAir Filter B4-MP-Odor Replacement HEPA Filter for BreatheSmart 45i & Flex Air Purifier-Captures Allergens & Mold + Pet Dander & Odors (1 Filter)

AlenAir Filter B4-MP-Odor Replacement HEPA Filter for BreatheSmart 45i & Flex Air Purifier-Captures Allergens & Mold + Pet Dander & Odors (1 Filter)

Q: What are the dimensions of this filter?

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?

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?

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?

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.

4.7/5

Product ID: 331373212

Secure Transaction

Details

Brand
Alen
Material
Odors/Heavy
MERV rating
13
Compatible devices
Air Purifier
Item weight
948 g

⏳9-12 months long-lasting lifespan

🦠99.9% particle capture @ 0.1 micron

🛠️Easy vacuum-clean pre-filter

Frequently Bought Together

Alen Air Filter B4-MP-Odor Replacement HEPA Filter for BreatheSmart 45i & Flex Air Purifier-Captures Allergens & Mold + Pet Dander & Odors (1 Filter)

Alen Air Filter B7-Odor Replacement True HEPA Filter for BreatheSmart 75i Air Purifier - Captures Allergens & Mold + Pet Dander & Odors (1 Filter)

Alen Air Filter BF35-Odor Replacement HEPA Filter for BreatheSmart Classic Air Purifier - Captures Allergens & Mold + Pet Dander & Odors (1 Filter)

Description

🌬️ Breathe smarter, live fresher — your air’s new best friend!

LEAK PROOF DESIGN - Foam-sealed frame maximizes airflow and ensures no air bypasses the filter for superior efficiency.
EXTENDED FILTER LIFE - Enjoy up to 12 months of continuous, hassle-free air purification without frequent replacements.
EFFORTLESS MAINTENANCE - Vacuum-cleanable pre-filter screen extends filter life and saves you time and money.
ODOR ALLERGEN DEFENSE - Eliminates stubborn household odors, pet dander, mold, and germs to keep your space fresh and safe.
MEDICAL GRADE H 13 TRUE HEPA - Captures 99.9% of airborne particles as tiny as 0.1 micron for pristine air quality.

The Alen Air Filter B4-MP-Odor Replacement features a medical-grade H13 True HEPA filter that captures 99.9% of airborne particles down to 0.1 micron, including allergens, mold, pet dander, and odors. Designed for the BreatheSmart 45i & Flex Air Purifiers, it offers a 9-12 month lifespan with a vacuum-cleanable pre-filter for easy maintenance and a foam-sealed frame to prevent air leaks, ensuring efficient and long-lasting air purification.

Specifications

Product Dimensions	5.08 x 27.94 x 38.1 cm; 948.01 g
Item Weight	948 g
Specification met	CARB Certified, EPA Certified
Is assembly required	No
Number of pieces	1
Batteries required	No
Included components	Replacement Filter

Have a Question? See What Others Asked

What are the dimensions of this filter?

Why would my unit indicate a need to change filter after less than a month of use?

Does the replacement filter come with a new pre-filter?

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?

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving over 300 million shoppers across more than 200 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

¥53144

Duties & taxes incl.

Japanstore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

View all Trustpilot reviews

About Us

Customer Services

Customer Support

Regional Access

Legal & Policies

Social

Get the App