Product review (5 stars): Many uses - trying a different approach.
Easy set up - attached to my furnace humidifier water intake (1/4 inch QC)  - i am hoping this keeps some if not all of the white chalky gunk from building up in my filter - in past, i have had calcium buildup / i do have hard water obviously - so bad it made for a white powdery dust all over my furniture - if this filter does as i hope, i will order 6 or 7 and be good many many years.
UPDATE 04Mar18 ... great filter - less dust/white chalk etc - changed the furnace humidifier filter mid FEB and likely could have deferrred this ... this filter will save me time with dusting etc and replacement filter costs on the humidifier - would be nice if this item shipped directly to Canada