The models with the higher wattage ratings are capable of distilling more water per hour than the lower wattage units. A discharge line from the units can be connected to a refrigerator, water cooler or fountain with a demand pump option. Permanent water distillers should have a drain opening to remove contaminated water. Faucets facilitate draining countertop units. Cleaning the distiller varies in frequency with the quantity of impurities in the water.
Some manufacturers recommend cleaning the machine after every third distillation.
White vinegar may be used by leaving it in the boiling tank overnight, or a special cleaner made by the appliance manufacturer may be used. Cost to purchase a distiller is much higher than that for a filtering device. In order to compare the cost of distilling water at home with the cost and convenience of buying bottled water, the following data are necessary. Guidelines for comparing cost of distilled vs. bottled water. Comparison of treatment devices.