Laurastar products have been designed to work with tap water. Please note that no additives should be added at any time such as perfumed water, water containing chemical products, or water collected in the dryer as these may damage your Laurastar products.
If your tap water is very hard or contains many minerals (e.g., well water, hard water, water softener, many minerals in water), we recommend using store bought spring water.
Distilled water, reverse osmosis , rain water, demineralized water, perfumed water, water from clothes dryer machine, and, water from household dehumidifiers is not recommended because it is too pure and does not contain any minerals and thus no conductibility. The absence of conductibility will prevent the probe inside the boiler detecting the water level.