Ratings & Reviews for Alen B4-Fresh + Carbon HEPA Air Purifier Filter

Best Brand

I chose Allen because of my sensitivity to environmental toxins, as well as the stylishly designed air purifier units. The replacement filters are easily ordered, simply replaced, and are delivered expeditiously. Thank you, Allen, for making my life healthier and simpler! Nani Lawrence

Easy to change. I’m unable

Easy to change. I’m unable to get the green light for the filter to go on. It it still yellow

Amazing how clean our home smells

We live in central Florida, and our units keep us feeling pollen, dust and aroma free. The HEPA filters are great

TRUE HEPA

Great filter we have 2 breathesmat one upstairs one down. The system is great but filters cost is too high. Friends are switching to other systems for that reason. I will stay another year or so then start the research to switch though I like the units it's hard to justify the cost of replacement filters.

Does the job for me

Filters EZ to order, EZ to install, runs silent. Can select speed and hours. I replace every 12 mos. No animals, and only on during day.

Happy with our air purifier,

Happy with our air purifier, haven’t installed new filter yet,

45i Filter

After 1st yr of use am pleased w/ filter's performance ...

I I have been using

I I have been using Allen filters for three years. It has decrease my asthma episodes, and allowed me to breathe easily at night without coughing.

The flex and i45 filters

The flex and i45 filters are the same. I wish they stated that on the website. If I had known I would have chosen the bundle to save some money. Instead I bought them individually due to having both the flex and i45 and paid more instead of getting the bundle price.

Clean Air

What other conclusion can you come to...this is my fifth unit that I have purchased (gifts to my daughter and son (2 each) for their homes and the latest for my home. I'm a believer and loyal customer for ever.

It works!

This filter is the only thing between us and our next door neighbors wood stove smoke. It cuts the smell and allows us to breathe much easier than without.

Works just fine

This is my first replacement filter. It was incredibly easy to remove the old one and install the new one. The first filter lasted about 10 months. I had been hoping it would last a year, but considering the true workout the air purifier got, I think it lasted admirably. Large remodeling job upgrading both bathroom and kitchen, then an air conditioning failure that included ceiling collapse. So, in view of all of that, yes, it performed incredibly well.