The final 1 vaporizes drinking water to produce a heat mist, and you could operate the risk of fireplace hazards in this case. Impeller humidifiers are pretty noisy. Ultrasonic humidifiers are definitely the best choice for grow tents. The Vicks Filter-Totally free Ultrasonic Great Mist Humidifier is our picked out https://lazypro.com/blogs/humidifiers/best-grow-tent-humidifier