Alen BreatheSmart Pure filter references
Choose the exact purifier model.
01
The number in the B-code follows the purifier family
B3-Pure is documented for 35i, B4-Pure for 45i and FLEX, B7-Pure for 75i, and BF35-Pure for BreatheSmart Classic. Preserve the complete purifier name before choosing a variant.
Read: Similar purifier names: which filter reference belongs to yours?02
Pure identifies the selected filter variant
These records cover the Pure or Essential option. Alen documents other filter variants with different media and references, so a shared BreatheSmart fit does not make every variant the same product.
Read: Pre-filter, main filter or a complete replacement set?03