We recommend you stick with the big 3. They've been around over 20 years with good financial strength and will probably be around when you need them. This specification measures the rate at which the distiller produces water. TYPE - Distillers are either manual or automatic types. Manual distillers can only produce one gallon of water at a time because they are limited by the size of their boiling chambers.
Automatic distillers produce water continuously.
They are connected directly to the water line. NSF Certified - NSF is a nonprofit, independent organization with more than 50 years experience in testing and certifying products to ensure they meet strict public health standards. For a system to become NSF Certified, it must meet not one but five basic requirements. The first requirement assures you contaminant reduction claims are true. The second assures you the system does not add anything harmful to the water.