Whole-house and point-of-use systems solve different problems.
Whole-house filtration
treats water as it enters the home. The filter media and system design must match the condition being addressed, such as sediment, taste, odor, iron, sulfur, or another tested concern.
Reverse osmosis
Treats water at a selected drinking-water tap. It can be considered for drinking and cooking water after Wenger reviews the water conditions, pretreatment needs, available space, water use, and maintenance expectations.
A home may need one approach or a treatment sequence. Wenger explains what each stage is intended to do and what it cannot do.