To maintain your whole home filtration system’s effectiveness, you need to replace its filter every 3 to 6 months. Our whole home replacement filters carry a 5-micron or sub-micron rating. This rating scale refers to the size of the particles that are removed from your water. Contaminants like chlorine are larger than 5. This makes our replacement filters perfect for removing chlorine taste and odor from your home so your water tastes, smells and feels as fresh as it should.