Do water vapor fireplace create humidity or condensation in the room?

Water vapor fireplaces do create some humidity in the room, but the effect is generally minimal. The fine mist produced by these fireplaces is quickly absorbed by the surrounding air, which means it does not lead to significant condensation or moisture buildup on surfaces. 

However, prolonged use in poorly ventilated spaces can potentially increase humidity levels, leading to discomfort or issues like mold growth if not monitored. It's important to ensure proper ventilation when using these fireplaces to maintain a healthy indoor environment and prevent excessive humidity-related problems. 

In summary, while water vapor fireplaces can add slight humidity, they are designed to minimize condensation and should not create significant moisture issues when used appropriately.