Reverse Osmosis Requirements
Important to note is the reverse osmosis filter requires a drain and 50% of the water used is wasted down the drain. Very cold water or low pressure can reduce this efficiency. The TrueSteam would need 6-12 gallons per day, thus the RO process would also send 6-12 gallons to the drain.
The RO water is pure and tasteless, ideal for the steam humidifier. RO water is stripped of minerals leaving the water with a high PH (acrid), not a problem for the humidifier. But do not use copper tubing with the acrid RO water. For such usage, the high PH would need to be offset by adding (dissolving) a mineral such as calcite in to the water.