depending on the available space and configuration preferences

Within a week NO2 levels in the bedroom dropped by 23%

How often should I check the humidity level in the humidor

These features are included

Allergy Machine Filter Color:Black depending on the available spaceAll standard size units are interchangeable with all standard size filters. So, if you purchased a standard size HealthMate and would like to upgrade to the Allergy Machine, simply purchase a replacement Allergy Machine filter. When ordering your replacement filter, please ensure you have selected the correct size and type, before confirming your order as there may be a restocking fee for returning filters that are ordered incorrectly. Filter