RO has too much waste. Buy a distiller on amazon. They cost 50-70 dollars. I have been using mine daily for 5 years now.
An ro system does require some maintenance.
From Google......
A reverse osmosis (RO) system may produce too much waste water for a number of reasons, including low water pressure, a dirty filter, or a clogged membrane.
Causes
- Low water pressure: Water pressure below 35-40 PSI can lead to increased water usage.
- Dirty filter: A dirty sediment filter can cause pressure to drop, which can lead to more water waste.
- Clogged membrane: Calcium and other minerals can build up on the membrane, causing it to clog. This can reduce the amount of product water produced.
- Worn out valves: Worn out valves can reduce the efficiency of the system.
Solutions
- Check the water pressure: Ensure the home has adequate water pressure for efficient RO operation.
- Replace the filter: Replace the sediment filter and carbon filters if needed.
- Replace the membrane: Remove and inspect the RO membrane, and replace it if needed.
- Add a booster pump: A booster pump can increase the water pressure, which can reduce water waste.
- Add a water-saver kit: A water-saver kit can use the waste water from the first membrane to produce more product water.
- Reuse the waste water: The waste water from an RO system can be used to clean utensils.
But, for me, the bit of maintenance allowing for the convenience of just turning on a tap to fill a humidifier vs running a distiller for a limited amount of distilled water is an easy decision. The cost to install an ro system is higher for sure. But, the convenience makes the investment worth it IMO.