Whole-House vs Point-of-Use Systems
Updated February 20, 2026
Key Takeaway
Whole-house systems filter every drop entering your home. Point-of-use treats water at a single fixture. The right choice depends on what you are treating, your budget, and whether you need treated water at every tap.
Overview
Whole-house systems filter every drop entering your home. Point-of-use treats water at a single fixture. The right choice depends on what you are treating, your budget, and whether you need treated water at every tap.
What to Know
Buying Tips
- Chlorine concern: whole-house carbon is most impactful single upgrade.
- Lead or fluoride: point-of-use RO at kitchen sink is sufficient.
- Whole-house + RO is the gold standard for comprehensive treatment.
- Well water almost always needs whole-house treatment.
Common Mistakes
- Only point-of-use when sediment is damaging water heater and appliances.
- Whole-house RO -- expensive, wasteful, unnecessary for showers and toilets.
- Assuming fridge filter replaces proper treatment.
- Not budgeting for ongoing filter replacement costs.
Bottom Line
Whole-house carbon for chlorine and sediment. Point-of-use RO for drinking water purity. Both together for best comprehensive treatment.