What is a primary feature of countertop Reverse Osmosis (RO) systems?

Countertop Reverse Osmosis (RO) systems are designed with versatility and convenience in mind, making them particularly suitable for situations like rentals or where space beneath the sink is limited. One of their key features is that they are typically portable and do not require permanent installation; users can easily move them as needed or set them up without significant alterations to existing plumbing. This temporary setup is especially advantageous for renters who may not want to make permanent changes to their property.

While other features may pertain to different RO systems, options like extensive modifications to plumbing or being the least effective purification method do not align with the design and function of countertop units. Similarly, permanent installations are not characteristic of this type of system, reinforcing that the flexibility to adapt to various environments is a defining strength of countertop RO systems.