Increased storage capacity will be advantageous only for continuous flow units. When the distiller's storage tank empties, it turns itself on and fills the storage containers. Capacity is increased by increasing the total amount of distilled water available to the user. Distillers that use a combination of VOC removal methods are more efficient than those using one single method. Gas vents are small holes drilled into the passage leading to the cooling coils.
Gas vents allow VOCs to escape the distiller before they enter the cooling section coils.
VOCs are removed when they condense in a different section of the fractional column than where water does. Fractional distillers usually cost more than distillers with gas vents or ACF cartridges. ACFs trap VOCs in millions of small pores. ACFs need periodic replacement. The life span of an ACF is dependent on the concentration of VOCs in the water.